x86: Use BRK to pre mapping page table to make xen happy

on top of tip/x86/mm2, but please zap last patch in that branch.

1. use brk to mapping first PMD_SIZE range.
2. top down to initialize page table range by range.
3. get rid of calculate page table, and find_early_page_table.
4. remove early_ioremap in page table accessing.

v2: changes, update xen interface about pagetable_reserve, so not
use pgt_buf_* in xen code directly.
v3: use range top-down to initialize page table, so will not use
calculating/find early table anymore.
also reorder the patches sequence.

could be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-mm

later we could get rid of workaround about xen_mapping_pagetable_reserve, that could kill another 50 lines codes. --- will do that later because x86/mm2 is not updated to linus/master yet. If we do that now, will have merge conflicts.

Thanks

Yinghai Lu

Yinghai Lu (7):
x86, mm: align start address to correct big page size x86, mm: Use big page size for small memory range
x86, mm: Don't clear page table if next range is ram x86, mm: only keep initial mapping for ram
x86, mm: Break down init_all_memory_mapping
x86, mm: setup page table from top-down
x86, mm: Remove early_memremap workaround for page table accessing

 arch/x86/include/asm/page_types.h |    1 +
 arch/x86/include/asm/pgtable.h    |    1 +
 arch/x86/kernel/setup.c           |    3 +
 arch/x86/mm/init.c                |  251 ++++++++++++------------------------
 arch/x86/mm/init_32.c             |   18 +++-
 arch/x86/mm/init_64.c             |  100 ++++++---------
 6 files changed, 144 insertions(+), 230 deletions(-)

1.7.7

We are going to use buffer in BRK to pre-map final page table buffer.

Final page table buffer could be only page aligened, but around it are still ram, we could use bigger page to map it to avoid small page.

We will probe to adjust page_size_mask in next patch to make big page size could be used with small ram range.

Before that, this patch will make start address to be aligned down according to bigger page size. otherwise entry in page page will not have correct value.

---
 arch/x86/mm/init_32.c |    1 +
 arch/x86/mm/init_64.c |    5 +++--
 2 files changed, 4 insertions(+), 2 deletions(-)

index 11a5800..27f7fc6 100644
@@ -310,6 +310,7 @@ repeat:
 					__pgprot(PTE_IDENT_ATTR |
 						 _PAGE_PSE);
 
+				pfn &= PMD_MASK >> PAGE_SHIFT;
 				addr2 = (pfn + PTRS_PER_PTE-1) * PAGE_SIZE +
 					PAGE_OFFSET + PAGE_SIZE-1;
 

index ab558eb..f40f383 100644
@@ -461,7 +461,7 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
 			pages++;
 			spin_lock(&init_mm.page_table_lock);
 			set_pte((pte_t *)pmd,
-				pfn_pte(address >> PAGE_SHIFT,
+				pfn_pte((address & PMD_MASK) >> PAGE_SHIFT,
 					__pgprot(pgprot_val(prot) | _PAGE_PSE)));
 			spin_unlock(&init_mm.page_table_lock);
 			last_map_addr = next;

@@ -536,7 +536,8 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
 			pages++;
 			spin_lock(&init_mm.page_table_lock);
 			set_pte((pte_t *)pud,
-				pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
+				pfn_pte((addr & PUD_MASK) >> PAGE_SHIFT,
+					PAGE_KERNEL_LARGE));
 			spin_unlock(&init_mm.page_table_lock);
 			last_map_addr = next;
 			continue;

1.7.7

We could map small range in the middle of big range at first, so should use big page size at first to avoid using small page size to break down page table.

Only can set big page bit when that range has big ram area around it.

---
 arch/x86/mm/init.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

index c12dfd5..ebf76ce 100644
@@ -88,6 +88,35 @@ static int __meminit save_mr(struct map_range *mr, int nr_range,
 	return nr_range;
 }
 
+/*
+ * adjust the page_size_mask for small range to go with
+ *	big page size instead small one if nearby are ram too.
+ */
+static void __init_refok adjust_range_page_size_mask(struct map_range *mr,
+							 int nr_range)
+{
+	int i;
+
+	for (i = 0; i < nr_range; i++) {
+		if ((page_size_mask & (1<<PG_LEVEL_2M)) &&
+		    !(mr[i].page_size_mask & (1<<PG_LEVEL_2M))) {
+			unsigned long start = round_down(mr[i].start, PMD_SIZE);
+			unsigned long end = round_up(mr[i].end, PMD_SIZE);
+
+			if (memblock_is_region_memory(start, end - start))
+				mr[i].page_size_mask |= 1<<PG_LEVEL_2M;
+		}
+		if ((page_size_mask & (1<<PG_LEVEL_1G)) &&
+		    !(mr[i].page_size_mask & (1<<PG_LEVEL_1G))) {
+			unsigned long start = round_down(mr[i].start, PUD_SIZE);
+			unsigned long end = round_up(mr[i].end, PUD_SIZE);
+
+			if (memblock_is_region_memory(start, end - start))
+				mr[i].page_size_mask |= 1<<PG_LEVEL_1G;
+		}
+	}
+}
+
 static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 				     unsigned long start,
 				     unsigned long end)

@@ -182,6 +211,9 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 		nr_range--;
 	}
 
+	if (!after_bootmem)
+		adjust_range_page_size_mask(mr, nr_range);
+
 	for (i = 0; i < nr_range; i++)
 		printk(KERN_DEBUG " [mem %#010lx-%#010lx] page %s\n",
 				mr[i].start, mr[i].end - 1,

1.7.7

After we add code use BRK to map buffer for final page table,

It should be safe to remove early_memmap for page table accessing.

But we get panic with that.

It turns out we clear the initial page table wrongly for next range that is separated by holes.
And it only happens when we are trying to map range one by one range separately.

After we add checking before clearing the related page table, that panic will not happen anymore.

---
 arch/x86/mm/init_64.c |   37 ++++++++++++++++---------------------
 1 files changed, 16 insertions(+), 21 deletions(-)

index f40f383..61b3c44 100644
@@ -363,20 +363,19 @@ static unsigned long __meminit
 phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
 	      pgprot_t prot)
 {
-	unsigned pages = 0;
+	unsigned long pages = 0, next;
 	unsigned long last_map_addr = end;
 	int i;
 
 	pte_t *pte = pte_page + pte_index(addr);
 
-	for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) {
-
+	for (i = pte_index(addr); i < PTRS_PER_PTE; i++, addr = next, pte++) {
+		next = (addr & PAGE_MASK) + PAGE_SIZE;
 		if (addr >= end) {
-			if (!after_bootmem) {
-				for(; i < PTRS_PER_PTE; i++, pte++)
-					set_pte(pte, __pte(0));
-			}
-			break;
+			if (!after_bootmem &&
+			    !e820_any_mapped(addr & PAGE_MASK, next, 0))
+				set_pte(pte, __pte(0));
+			continue;
 		}
 
 		/*

@@ -418,16 +417,14 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
 		pte_t *pte;
 		pgprot_t new_prot = prot;
 
+		next = (address & PMD_MASK) + PMD_SIZE;
 		if (address >= end) {
-			if (!after_bootmem) {
-				for (; i < PTRS_PER_PMD; i++, pmd++)
-					set_pmd(pmd, __pmd(0));
-			}
-			break;
+			if (!after_bootmem &&
+			    !e820_any_mapped(address & PMD_MASK, next, 0))
+				set_pmd(pmd, __pmd(0));
+			continue;
 		}
 
-		next = (address & PMD_MASK) + PMD_SIZE;
-
 		if (pmd_val(*pmd)) {
 			if (!pmd_large(*pmd)) {
 				spin_lock(&init_mm.page_table_lock);

@@ -494,13 +491,11 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
 		pmd_t *pmd;
 		pgprot_t prot = PAGE_KERNEL;
 
-		if (addr >= end)
-			break;
-
 		next = (addr & PUD_MASK) + PUD_SIZE;
-
-		if (!after_bootmem && !e820_any_mapped(addr, next, 0)) {
-			set_pud(pud, __pud(0));
+		if (addr >= end) {
+			if (!after_bootmem &&
+			    !e820_any_mapped(addr & PUD_MASK, next, 0))
+				set_pud(pud, __pud(0));
 			continue;
 		}
 

1.7.7

0 mean any e820 type will be kept, and only hole is removed.

change to E820_RAM and E820_RESERVED_KERN only.

---
 arch/x86/mm/init_64.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)

index 61b3c44..4898e80 100644
@@ -373,7 +373,8 @@ phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
 		next = (addr & PAGE_MASK) + PAGE_SIZE;
 		if (addr >= end) {
 			if (!after_bootmem &&
-			    !e820_any_mapped(addr & PAGE_MASK, next, 0))
+			    !e820_any_mapped(addr & PAGE_MASK, next, E820_RAM) &&
+			    !e820_any_mapped(addr & PAGE_MASK, next, E820_RESERVED_KERN))
 				set_pte(pte, __pte(0));
 			continue;
 		}

@@ -420,7 +421,8 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
 		next = (address & PMD_MASK) + PMD_SIZE;
 		if (address >= end) {
 			if (!after_bootmem &&
-			    !e820_any_mapped(address & PMD_MASK, next, 0))
+			    !e820_any_mapped(address & PMD_MASK, next, E820_RAM) &&
+			    !e820_any_mapped(address & PMD_MASK, next, E820_RESERVED_KERN))
 				set_pmd(pmd, __pmd(0));
 			continue;
 		}

@@ -494,7 +496,8 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
 		next = (addr & PUD_MASK) + PUD_SIZE;
 		if (addr >= end) {
 			if (!after_bootmem &&
-			    !e820_any_mapped(addr & PUD_MASK, next, 0))
+			    !e820_any_mapped(addr & PUD_MASK, next, E820_RAM) &&
+			    !e820_any_mapped(addr & PUD_MASK, next, E820_RESERVED_KERN))
 				set_pud(pud, __pud(0));
 			continue;
 		}

1.7.7

This is good candidate for squashing in-to the previous patch, with verbose explanation why you care only about those two types.

two patches should be more safe.

new series will make sure only map RAM/RESEVED_KERN, so we should only keep initial page table with those types.

Will replace that will top-down page table initialization. new one need to take range.

---
 arch/x86/mm/init.c |   41 +++++++++++++++++++----------------------
 1 files changed, 19 insertions(+), 22 deletions(-)

index ebf76ce..23ce4db 100644
@@ -393,40 +393,30 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
  * Depending on the alignment of E820 ranges, this may possibly result in using
  * smaller size (i.e. 4K instead of 2M or 1G) page tables.
  */
-static void __init init_all_memory_mapping(void)
+static void __init init_all_memory_mapping(unsigned long all_start,
+					   unsigned long all_end)
 {
 	unsigned long start_pfn, end_pfn;
 	int i;
 
-	/* the ISA range is always mapped regardless of memory holes */
-	init_memory_mapping(0, ISA_END_ADDRESS);
-
 	for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn, NULL) {
 		u64 start = start_pfn << PAGE_SHIFT;
 		u64 end = end_pfn << PAGE_SHIFT;
 
-		if (end <= ISA_END_ADDRESS)
+		if (end <= all_start)
 			continue;
 
-		if (start < ISA_END_ADDRESS)
-			start = ISA_END_ADDRESS;
-#ifdef CONFIG_X86_32
-		/* on 32 bit, we only map up to max_low_pfn */
-		if ((start >> PAGE_SHIFT) >= max_low_pfn)
+		if (start < all_start)
+			start = all_start;
+
+		if (start >= all_end)
 			continue;
 
-		if ((end >> PAGE_SHIFT) > max_low_pfn)
-			end = max_low_pfn << PAGE_SHIFT;
-#endif
-		init_memory_mapping(start, end);
-	}
+		if (end > all_end)
+			end = all_end;
 
-#ifdef CONFIG_X86_64
-	if (max_pfn > max_low_pfn) {
-		/* can we preseve max_low_pfn ?*/
-		max_low_pfn = max_pfn;
+		init_memory_mapping(start, end);
 	}
-#endif
 }
 
 void __init init_mem_mapping(void)

@@ -456,8 +446,15 @@ void __init init_mem_mapping(void)
 		(pgt_buf_top << PAGE_SHIFT) - 1);
 
 	max_pfn_mapped = 0; /* will get exact value next */
-	init_all_memory_mapping();
-
+	/* the ISA range is always mapped regardless of memory holes */
+	init_memory_mapping(0, ISA_END_ADDRESS);
+	init_all_memory_mapping(ISA_END_ADDRESS, end);
+#ifdef CONFIG_X86_64
+	if (max_pfn > max_low_pfn) {
+		/* can we preseve max_low_pfn ?*/
+		max_low_pfn = max_pfn;
+	}
+#endif
 	/*
 	 * Reserve the kernel pagetable pages we used (pgt_buf_start -
 	 * pgt_buf_end) and free the other ones (pgt_buf_end - pgt_buf_top)

1.7.7

s/will/with?

Huh? I have no idea what this patch does from your description. It says it will replace something (not identified) with top-down table initialization.

And the code is not that simple - you should explain _how_ you are changing it. From what it did before to what it does _now_.

Think of the audience of kernel engineers who have memory loss and will forget everything in three months - the perfect time when the merge window opens and bugs start appearing. They (ok, maybe it is only me who is needs this) need the documentation to figure out what went wrong. Please explain it.

I tried to make the next patch to be little smaller, so split this change out.

Get pgt_buf early from BRK, and use it to map PMD_SIZE to top at first. then use page from PMD_SIZE to map next blow range.

alloc_low_page will use page from BRK at first, then will switch to use to memblock to find and reserve page for page table usage.

At last we could get rid of calculation and find early pgt related code.

---
 arch/x86/include/asm/page_types.h |    1 +
 arch/x86/include/asm/pgtable.h    |    1 +
 arch/x86/kernel/setup.c           |    3 +
 arch/x86/mm/init.c                |  188 ++++++++-----------------------------
 arch/x86/mm/init_32.c             |   17 +++-
 arch/x86/mm/init_64.c             |   17 +++-
 6 files changed, 71 insertions(+), 156 deletions(-)

index 54c9787..9f6f3e6 100644
@@ -45,6 +45,7 @@ extern int devmem_is_allowed(unsigned long pagenr);
 
 extern unsigned long max_low_pfn_mapped;
 extern unsigned long max_pfn_mapped;
+extern unsigned long min_pfn_mapped;
 
 static inline phys_addr_t get_max_mapped(void)
 {

index 52d40a1..25fa5bb 100644
@@ -599,6 +599,7 @@ static inline int pgd_none(pgd_t pgd)
 
 extern int direct_gbpages;
 void init_mem_mapping(void);
+void early_alloc_pgt_buf(void);
 
 /* local pte updates need not use xchg for locking */
 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)

index 4989f80..3987daa 100644
@@ -123,6 +123,7 @@
  */
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
+unsigned long min_pfn_mapped;
 
 #ifdef CONFIG_DMI
 RESERVE_BRK(dmi_alloc, 65536);

@@ -896,6 +897,8 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_ibft_region();
 
+	early_alloc_pgt_buf();
+
 	/*
 	 * Need to conclude brk, before memblock_x86_fill()
 	 *  it could use memblock_find_in_range, could overlap with

index 27f7fc6..7bb1106 100644
@@ -61,11 +61,22 @@ bool __read_mostly __vmalloc_start_set = false;
 
 static __init void *alloc_low_page(void)
 {
-	unsigned long pfn = pgt_buf_end++;
+	unsigned long pfn;
 	void *adr;
 
-	if (pfn >= pgt_buf_top)
-		panic("alloc_low_page: ran out of memory");
+	if ((pgt_buf_end + 1) >= pgt_buf_top) {
+		unsigned long ret;
+		if (min_pfn_mapped >= max_pfn_mapped)
+			panic("alloc_low_page: ran out of memory");
+		ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT,
+					max_pfn_mapped << PAGE_SHIFT,
+					PAGE_SIZE, PAGE_SIZE);
+		if (!ret)
+			panic("alloc_low_page: can not alloc memory");
+		memblock_reserve(ret, PAGE_SIZE);
+		pfn = ret >> PAGE_SHIFT;
+	} else
+		pfn = pgt_buf_end++;
 
 	adr = __va(pfn * PAGE_SIZE);
 	clear_page(adr);

index 4898e80..7dfa69b 100644
@@ -316,7 +316,7 @@ void __init cleanup_highmap(void)
 
 static __ref void *alloc_low_page(unsigned long *phys)
 {
-	unsigned long pfn = pgt_buf_end++;
+	unsigned long pfn;
 	void *adr;
 
 	if (after_bootmem) {

@@ -326,8 +326,19 @@ static __ref void *alloc_low_page(unsigned long *phys)
 		return adr;
 	}
 
-	if (pfn >= pgt_buf_top)
-		panic("alloc_low_page: ran out of memory");
+	if ((pgt_buf_end + 1) >= pgt_buf_top) {
+		unsigned long ret;
+		if (min_pfn_mapped >= max_pfn_mapped)
+			panic("alloc_low_page: ran out of memory");
+		ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT,
+					max_pfn_mapped << PAGE_SHIFT,
+					PAGE_SIZE, PAGE_SIZE);
+		if (!ret)
+			panic("alloc_low_page: can not alloc memory");
+		memblock_reserve(ret, PAGE_SIZE);
+		pfn = ret >> PAGE_SHIFT;
+	} else
+		pfn = pgt_buf_end++;
 
 	adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
 	clear_page(adr);

1.7.7

sorry , there one typo in this patch, please use attached one instead.

Subject: [PATCH] x86, mm: setup page table from top-down

Get pgt_buf early from BRK, and use it to map PMD_SIZE to top at first. then use page from PMD_SIZE to map next blow range.

alloc_low_page will use page from BRK at first, then will switch to use to memblock to find and reserve page for page table usage.

At last we could get rid of calculation and find early pgt related code.

---
 arch/x86/include/asm/page_types.h |    1 
 arch/x86/include/asm/pgtable.h    |    1 
 arch/x86/kernel/setup.c           |    3 
 arch/x86/mm/init.c                |  188 +++++++-------------------------------
 arch/x86/mm/init_32.c             |   17 ++-
 arch/x86/mm/init_64.c             |   17 ++-
 6 files changed, 71 insertions(+), 156 deletions(-)

Index: linux-2.6/arch/x86/include/asm/pgtable.h
===================================================================
@@ -603,6 +603,7 @@ static inline int pgd_none(pgd_t pgd)
 
 extern int direct_gbpages;
 void init_mem_mapping(void);
+void early_alloc_pgt_buf(void);
 
 /* local pte updates need not use xchg for locking */
 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)

Index: linux-2.6/arch/x86/kernel/setup.c
===================================================================
@@ -123,6 +123,7 @@
  */
 unsigned long max_low_pfn_mapped;
 unsigned long max_pfn_mapped;
+unsigned long min_pfn_mapped;
 
 #ifdef CONFIG_DMI
 RESERVE_BRK(dmi_alloc, 65536);

@@ -896,6 +897,8 @@ void __init setup_arch(char **cmdline_p)
 
 	reserve_ibft_region();
 
+	early_alloc_pgt_buf();
+
 	/*
 	 * Need to conclude brk, before memblock_x86_fill()
 	 *  it could use memblock_find_in_range, could overlap with

Index: linux-2.6/arch/x86/include/asm/page_types.h
===================================================================
@@ -45,6 +45,7 @@ extern int devmem_is_allowed(unsigned lo
 
 extern unsigned long max_low_pfn_mapped;
 extern unsigned long max_pfn_mapped;
+extern unsigned long min_pfn_mapped;
 
 static inline phys_addr_t get_max_mapped(void)
 {

Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
@@ -61,11 +61,22 @@ bool __read_mostly __vmalloc_start_set =
 
 static __init void *alloc_low_page(void)
 {
-	unsigned long pfn = pgt_buf_end++;
+	unsigned long pfn;
 	void *adr;
 
-	if (pfn >= pgt_buf_top)
-		panic("alloc_low_page: ran out of memory");
+	if ((pgt_buf_end + 1) >= pgt_buf_top) {
+		unsigned long ret;
+		if (min_pfn_mapped >= max_pfn_mapped)
+			panic("alloc_low_page: ran out of memory");
+		ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT,
+					max_pfn_mapped << PAGE_SHIFT,
+					PAGE_SIZE, PAGE_SIZE);
+		if (!ret)
+			panic("alloc_low_page: can not alloc memory");
+		memblock_reserve(ret, PAGE_SIZE);
+		pfn = ret >> PAGE_SHIFT;
+	} else
+		pfn = pgt_buf_end++;
 
 	adr = __va(pfn * PAGE_SIZE);
 	clear_page(adr);

Index: linux-2.6/arch/x86/mm/init_64.c
===================================================================
@@ -316,7 +316,7 @@ void __init cleanup_highmap(void)
 
 static __ref void *alloc_low_page(unsigned long *phys)
 {
-	unsigned long pfn = pgt_buf_end++;
+	unsigned long pfn;
 	void *adr;
 
 	if (after_bootmem) {

@@ -326,8 +326,19 @@ static __ref void *alloc_low_page(unsign
 		return adr;
 	}
 
-	if (pfn >= pgt_buf_top)
-		panic("alloc_low_page: ran out of memory");
+	if ((pgt_buf_end + 1) >= pgt_buf_top) {
+		unsigned long ret;
+		if (min_pfn_mapped >= max_pfn_mapped)
+			panic("alloc_low_page: ran out of memory");
+		ret = memblock_find_in_range(min_pfn_mapped << PAGE_SHIFT,
+					max_pfn_mapped << PAGE_SHIFT,
+					PAGE_SIZE, PAGE_SIZE);
+		if (!ret)
+			panic("alloc_low_page: can not alloc memory");
+		memblock_reserve(ret, PAGE_SIZE);
+		pfn = ret >> PAGE_SHIFT;
+	} else
+		pfn = pgt_buf_end++;
 
 	adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
 	clear_page(adr);

ok, will change that interface and call in from alloc_low_page.

how about the pages from BRK, do we need to call xen hooks to mark it as RO?

It doesn't matter whether they come from BRK or other memory: Xen assumes that all the pagetable pages come from pgt_buf_start-pgt_buf_top, so if you are going to use another range you need to tell Xen about it.

Alternatively, you can follow Peter's suggestion and replace the current hooks with a new one with a more precise and well defined semantic. Something along the lines of "this pagetable page is about to be hooked into the live pagetable". Xen would use the hook to mark it RO.

attached patch on top of this patch will fix the problem?

---
 arch/x86/include/asm/x86_init.h |    2 +-
 arch/x86/kernel/x86_init.c      |    3 ++-
 arch/x86/mm/init_32.c           |    1 +
 arch/x86/mm/init_64.c           |    1 +
 arch/x86/xen/mmu.c              |   15 +++------------
 5 files changed, 8 insertions(+), 14 deletions(-)

Index: linux-2.6/arch/x86/include/asm/x86_init.h
===================================================================
@@ -76,7 +76,7 @@ struct x86_init_oem {
  * init_memory_mapping and the commit that added it.
  */
 struct x86_init_mapping {
-	void (*pagetable_reserve)(u64 start, u64 end);
+	void (*mark_page_ro)(u64 addr);
 };
 
 /**

Index: linux-2.6/arch/x86/kernel/x86_init.c
===================================================================
@@ -28,6 +28,7 @@ void __cpuinit x86_init_noop(void) { }
 void __init x86_init_uint_noop(unsigned int unused) { }
 int __init iommu_init_noop(void) { return 0; }
 void iommu_shutdown_noop(void) { }
+static void mark_page_ro_noop(u64 addr) { }
 
 /*
  * The platform setup functions are preset with the default functions

@@ -63,7 +64,7 @@ struct x86_init_ops x86_init __initdata
 	},
 
 	.mapping = {
-		.pagetable_reserve		= native_pagetable_reserve,
+		.mark_page_ro			= mark_page_ro_noop;
 	},
 
 	.paging = {

Index: linux-2.6/arch/x86/xen/mmu.c
===================================================================
@@ -1177,18 +1177,9 @@ static void xen_exit_mmap(struct mm_stru
 
 static void xen_post_allocator_init(void);
 
-static __init void xen_mapping_pagetable_reserve(u64 start, u64 end)
+static __init void xen_mapping_mark_page_ro(u64 addr)
 {
-	/* reserve the range used */
-	native_pagetable_reserve(start, end);
-
-	/* set as RW the rest */
-	printk(KERN_DEBUG "xen: setting RW the range %llx - %llx\n", end,
-			PFN_PHYS(pgt_buf_top));
-	while (end < PFN_PHYS(pgt_buf_top)) {
-		make_lowmem_page_readwrite(__va(end));
-		end += PAGE_SIZE;
-	}
+	make_lowmem_page_readonly(__va(addr));
 }
 
 #ifdef CONFIG_X86_64

@@ -2177,7 +2168,7 @@ static const struct pv_mmu_ops xen_mmu_o
 
 void __init xen_init_mmu_ops(void)
 {
-	x86_init.mapping.pagetable_reserve = xen_mapping_pagetable_reserve;
+	x86_init.mapping.mark_page_ro = xen_mapping_mark_page_ro;
 	x86_init.paging.pagetable_init = xen_pagetable_init;
 	pv_mmu_ops = xen_mmu_ops;
 

Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
@@ -78,6 +78,7 @@ static __init void *alloc_low_page(void)
 	} else
 		pfn = pgt_buf_end++;
 
+	x86_init.mapping.mark_page_ro(pfn << PAGE_SHIFT);
 	adr = __va(pfn * PAGE_SIZE);
 	clear_page(adr);
 	return adr;

Index: linux-2.6/arch/x86/mm/init_64.c
===================================================================
@@ -340,6 +340,7 @@ static __ref void *alloc_low_page(unsign
 	} else
 		pfn = pgt_buf_end++;
 
+	x86_init.mapping.mark_page_ro(pfn << PAGE_SHIFT);
 	adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
 	clear_page(adr);
 	*phys  = pfn * PAGE_SIZE;

.mapping = {
- .pagetable_reserve = native_pagetable_reserve,
+ .mark_page_ro = mark_page_ro_noop;
},

I have already objected to this naming in the past, because it describes an implementation ("hypervisor make readonly") as opposed to a semantic function "make this page permissible to use as a page table". I would call it pagetable_prepare or something like that.

-hpa

H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

please check v7 series with /46 in the title.

Not needed that anymore after patches include premaping page table buf and not clear initial page table wrongly.

---
 arch/x86/mm/init_64.c |   38 ++++----------------------------------
 1 files changed, 4 insertions(+), 34 deletions(-)

index 7dfa69b..4e6873f 100644
@@ -340,36 +340,12 @@ static __ref void *alloc_low_page(unsigned long *phys)
 	} else
 		pfn = pgt_buf_end++;
 
-	adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
+	adr = __va(pfn * PAGE_SIZE);
 	clear_page(adr);
 	*phys  = pfn * PAGE_SIZE;
 	return adr;
 }
 
-static __ref void *map_low_page(void *virt)
-{
-	void *adr;
-	unsigned long phys, left;
-
-	if (after_bootmem)
-		return virt;
-
-	phys = __pa(virt);
-	left = phys & (PAGE_SIZE - 1);
-	adr = early_memremap(phys & PAGE_MASK, PAGE_SIZE);
-	adr = (void *)(((unsigned long)adr) | left);
-
-	return adr;
-}
-
-static __ref void unmap_low_page(void *adr)
-{
-	if (after_bootmem)
-		return;
-
-	early_iounmap((void *)((unsigned long)adr & PAGE_MASK), PAGE_SIZE);
-}
-
 static unsigned long __meminit
 phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
 	      pgprot_t prot)

@@ -441,10 +417,9 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
 		if (pmd_val(*pmd)) {
 			if (!pmd_large(*pmd)) {
 				spin_lock(&init_mm.page_table_lock);
-				pte = map_low_page((pte_t *)pmd_page_vaddr(*pmd));
+				pte = (pte_t *)pmd_page_vaddr(*pmd);
 				last_map_addr = phys_pte_init(pte, address,
 								end, prot);
-				unmap_low_page(pte);
 				spin_unlock(&init_mm.page_table_lock);
 				continue;
 			}

@@ -480,7 +455,6 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
 
 		pte = alloc_low_page(&pte_phys);
 		last_map_addr = phys_pte_init(pte, address, end, new_prot);
-		unmap_low_page(pte);
 
 		spin_lock(&init_mm.page_table_lock);
 		pmd_populate_kernel(&init_mm, pmd, __va(pte_phys));

@@ -515,10 +489,9 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
 
 		if (pud_val(*pud)) {
 			if (!pud_large(*pud)) {
-				pmd = map_low_page(pmd_offset(pud, 0));
+				pmd = pmd_offset(pud, 0);
 				last_map_addr = phys_pmd_init(pmd, addr, end,
 							 page_size_mask, prot);
-				unmap_low_page(pmd);
 				__flush_tlb_all();
 				continue;
 			}

@@ -555,7 +528,6 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
 		pmd = alloc_low_page(&pmd_phys);
 		last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask,
 					      prot);
-		unmap_low_page(pmd);
 
 		spin_lock(&init_mm.page_table_lock);
 		pud_populate(&init_mm, pud, __va(pmd_phys));

@@ -591,17 +563,15 @@ kernel_physical_mapping_init(unsigned long start,
 			next = end;
 
 		if (pgd_val(*pgd)) {
-			pud = map_low_page((pud_t *)pgd_page_vaddr(*pgd));
+			pud = (pud_t *)pgd_page_vaddr(*pgd);
 			last_map_addr = phys_pud_init(pud, __pa(start),
 						 __pa(end), page_size_mask);
-			unmap_low_page(pud);
 			continue;
 		}
 
 		pud = alloc_low_page(&pud_phys);
 		last_map_addr = phys_pud_init(pud, __pa(start), __pa(next),
 						 page_size_mask);
-		unmap_low_page(pud);
 
 		spin_lock(&init_mm.page_table_lock);
 		pgd_populate(&init_mm, pgd, __va(pud_phys));

1.7.7

So while I appreciate you actively looking at this and iteratively sending snapshots of the progress - I think it would be easier if you posted a patchset that has rework done completly per what Peter described.

That way folks who are reviewing will know when they can focus their time on reviewing the whole thing in one go instead of doing it step by step - as some of the patches still haven't addressed the review comments that were given the first time.

I am confused. Why do you need x86/mm2? If you do need it, you need to describe in this writeup why you depend on it, and what is there.

You can't base it on linus's tree?

it should be done this time, so asked Stefano to test it again.

I addressed one that i can do.

no, some init_memory_mapping related cleanups are in x86/mm2.

the whole story: while reviewing x86/mm2,
Stefano say it would be better to get rid of ioremap to access page table area. so according to hpa's concept, I use some pages in BRK to pre-map page table at first.
on -v2, with xen Stefano found panic on system with more than 4g. To address that panic, we come out -v3 that will map memory top-down and range size for
each step is from PMD_SIZE to more bigger...

Thanks

Yinghai

I don't think you can change the x86 code without changing the xen code at the same time, otherwise you'll be really likely to break Xen. That is unless you don't change any of the pvops but I thought that it was one of the point of this series.

So you are missing the Xen patches entirely in this iteration of the series?

please check updated for-x86-mm branch.

[PATCH -v4 00/15] x86: Use BRK to pre mapping page table to make xen happy

on top of current linus/master and tip/x86/mm2, but please zap last patch in that branch.

1. use brk to mapping first PMD_SIZE range.
2. top down to initialize page table range by range.
3. get rid of calculate page table, and find_early_page_table.
4. remove early_ioremap in page table accessing.

v2: changes, update xen interface about pagetable_reserve, so not
use pgt_buf_* in xen code directly.
v3: use range top-down to initialize page table, so will not use
calculating/find early table anymore.
also reorder the patches sequence.
v4: add mapping_mark_page_ro to fix xen, also move pgt_buf_* to init.c
and merge alloc_low_page()

could be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-x86-mm

Yinghai Lu (15):
x86, mm: Align start address to correct big page size
x86, mm: Use big page size for small memory range
x86, mm: Don't clear page table if next range is ram
x86, mm: only keep initial mapping for ram
x86, mm: Break down init_all_memory_mapping
x86, xen: Add xen_mapping_mark_page_ro
x86, mm: setup page table in top-down
x86, mm: Remove early_memremap workaround for page table accessing on 64bit x86, mm: Remove parameter in alloc_low_page for 64bit
x86, mm: Merge alloc_low_page between 64bit and 32bit
x86, mm: Move min_pfn_mapped back to mm/init.c
x86, mm, xen: Remove mapping_pagatable_reserve
x86, mm: Add alloc_low_pages(num)
x86, mm: only call early_ioremap_page_range_init() one time on 32bit x86, mm: Move back pgt_buf_* to mm/init.c

 arch/x86/include/asm/init.h          |    4 -
 arch/x86/include/asm/pgtable.h       |    1 +
 arch/x86/include/asm/pgtable_types.h |    1 -
 arch/x86/include/asm/x86_init.h      |    2 +-
 arch/x86/kernel/setup.c              |    2 +
 arch/x86/kernel/x86_init.c           |    3 +-
 arch/x86/mm/init.c                   |  321 +++++++++++++++-------------------
 arch/x86/mm/init_32.c                |   76 ++++++--
 arch/x86/mm/init_64.c                |  119 ++++---------
 arch/x86/mm/mm_internal.h            |   11 ++
 arch/x86/xen/mmu.c                   |   29 +---
 11 files changed, 249 insertions(+), 320 deletions(-)
 create mode 100644 arch/x86/mm/mm_internal.h

Stefano,

Can you try -v4 to see if xen works with the changes?

Thanks

Yinghai

I find that patch series are easier to review than having to checkout your code and read the commit messages. Please post your patch series to the LKML next time.

In any case, regarding "x86, xen: Add xen_mapping_mark_page_ro": please take Peter's feedback into account; mark_page_ro is not a good name for a pvops.
Also I don't believe that this call is actually needed, see below.

Regarding "x86, mm: setup page table in top-down": if you mark the pagetable page RO in alloc_low_page, won't the entire thing crash as soon as you try to write to it? You are supposed to mark it RO after filling up the pagetable page and before hooking it into the live pagetable.
However contrary to my expectations, I did a quick test and it seems to be working, that is probably due to a bug: maybe __pa or lookup_address don't work correctly when called so early?

In any case we don't care about that because if we assume that alloc_low_pages will always return a page from a range that is already mapped, then we do not need this pvop anymore. That's because xen_alloc_pte_init, xen_alloc_pmd_init, etc, will mark the page RO before hooking it into the pagetable automatically.
Sorry for I misled you last time.

Let me repeat it again:
Can we assume that the page returned by alloc_low_pages is already mapped?

Yes? In that case let's get rid of mark_page_ro and everything should work.

It is worth stating it in clear letters in a comment on top of alloc_low_pages:

"This function always returns a page from a memory range already mapped."

Hi Yinghai, I just tried it and dom0 died during init_memory_mapping, here is the Oops snippet, full logs are attached:

e820: last_pfn = 0x22f000 max_arch_pfn = 0x400000000
e820: last_pfn = 0xcff00 max_arch_pfn = 0x400000000 initial memory mapped: [mem 0x00000000-0x022affff] Base memory trampoline at [ffff880000096000] 96000 size 24576
init_memory_mapping: [mem 0x00000000-0x000fffff]
[mem 0x00000000-0x000fffff] page 4k
init_memory_mapping: [mem 0x21fe00000-0x21fe77fff]
[mem 0x21fe00000-0x21fe77fff] page 4k
init_memory_mapping: [mem 0x21c000000-0x21fdfffff]
[mem 0x21c000000-0x21fdfffff] page 4k
init_memory_mapping: [mem 0x200000000-0x21bffffff]
[mem 0x200000000-0x21bffffff] page 4k
init_memory_mapping: [mem 0x00100000-0xcec6dfff]
[mem 0x00100000-0xcec6dfff] page 4k
init_memory_mapping: [mem 0xcf5f4000-0xcf5f4fff]
[mem 0xcf5f4000-0xcf5f4fff] page 4k
init_memory_mapping: [mem 0xcf7fb000-0xcfc19fff]
[mem 0xcf7fb000-0xcfc19fff] page 4k
init_memory_mapping: [mem 0xcfef4000-0xcfefffff]
[mem 0xcfef4000-0xcfefffff] page 4k
init_memory_mapping: [mem 0x100001000-0x1ffffffff]
[mem 0x100001000-0x1ffffffff] page 4k
PGD 0

Oops: 0003 [#1] SMP 
Modules linked in:
CPU 0 
Pid: 0, comm: swapper Not tainted 3.6.0+ #3 AMD Pike/Pike
RIP: e030:[<ffffffff81cd778a>]  [<ffffffff81cd778a>] xen_set_pte_init+0x1/0x9
RSP: e02b:ffffffff81c01ae8  EFLAGS: 00010086
RAX: 80000001913d1063 RBX: ffff88021f63b1c8 RCX: 8000000000000163
RDX: 00000000000001ff RSI: 80000001913d1063 RDI: ffff88021f63b1c8
RBP: ffffffff81c01af8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000011b039000
R13: 000000000000003a R14: 000000011b03a000 R15: 000000011b039000
FS:  0000000000000000(0000) GS:ffffffff81cbe000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000001c0b000 CR4: 0000000000000660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 0000000000000000 DR7: 0000000000000000
Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13410)
Stack:
 ffffffff81c01af8 ffffffff810330f5 ffffffff81c01b58 ffffffff816aa9f3
 8000000000000163 ffff88021f63c000 0000000200000000 000000011b039000
 ffffffff81c01b38 0000000000000000 000000011b000000 ffff88021f7146c0
Call Trace:
 [<ffffffff810330f5>] ? set_pte+0xb/0xd
 [<ffffffff816aa9f3>] phys_pte_init+0xd4/0x106
 [<ffffffff816aabe0>] phys_pmd_init+0x1bb/0x215
 [<ffffffff816aadf3>] phys_pud_init+0x1b9/0x218
 [<ffffffff816aaeff>] kernel_physical_mapping_init+0xad/0x14a
 [<ffffffff81682a1a>] init_memory_mapping+0x275/0x303
 [<ffffffff81ce6e62>] init_range_memory_mapping+0x8b/0xc8
 [<ffffffff81ce6f91>] init_mem_mapping+0xf2/0x162
 [<ffffffff81cd9d74>] setup_arch+0x682/0xaac
 [<ffffffff816af4ab>] ? printk+0x48/0x4a
 [<ffffffff81cd3868>] start_kernel+0x8e/0x3d8
 [<ffffffff81cd32d3>] x86_64_start_reservations+0xae/0xb2
 [<ffffffff81cd6dbc>] xen_start_kernel+0x63d/0x63f
Code: 00 00 48 c7 c7 f2 a8 aa 81 e8 ee 61 36 ff c7 05 59 10 06 00 01 00 00 00 5d c3 55 48 89 f7 48 89 e5 e8 95 cf 32 ff 31 c0 5d c3 55 <48> 89 37 48 89 e5 5d c3 55 48 89 e5 41 57 41 56 45 31 f6 41 55 
 RSP <ffffffff81c01ae8>
CR2: 0000000000000000
---[ end trace c2b54da46b5614cf ]---

Initializing cgroup subsys cpuset
Initializing cgroup subsys cpu
Linux version 3.6.0+ (jshin@jshin-Pike) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #3 SMP Fri Oct 12 16:22:42 CDT 2012 Command line: placeholder root=/dev/sda1 ro
Freeing 9c-100 pfn range: 100 pages freed
1-1 mapping on 9c->100
Freeing cec6e-cf5f4 pfn range: 2438 pages freed
1-1 mapping on cec6e->cf5f4
Freeing cf5f5-cf7fb pfn range: 518 pages freed
1-1 mapping on cf5f5->cf7fb
Freeing cfc1a-cfef4 pfn range: 730 pages freed
1-1 mapping on cfc1a->cfef4
Freeing cff00-100001 pfn range: 196865 pages freed
1-1 mapping on cff00->100001
Released 200651 pages of unused memory
Set 200651 page(s) to 1-1 mapping
Populating 1eeead-21fe78 pfn range: 200651 pages added
e820: BIOS-provided physical RAM map:
Xen: [mem 0x0000000000000000-0x000000000009bfff] usable
Xen: [mem 0x000000000009cc00-0x00000000000fffff] reserved
Xen: [mem 0x0000000000100000-0x00000000cec6dfff] usable
Xen: [mem 0x00000000cec6e000-0x00000000cedf1fff] reserved
Xen: [mem 0x00000000cedf2000-0x00000000cf149fff] ACPI NVS
Xen: [mem 0x00000000cf14a000-0x00000000cf5f3fff] reserved
Xen: [mem 0x00000000cf5f4000-0x00000000cf5f4fff] usable
Xen: [mem 0x00000000cf5f5000-0x00000000cf7fafff] ACPI NVS
Xen: [mem 0x00000000cf7fb000-0x00000000cfc19fff] usable
Xen: [mem 0x00000000cfc1a000-0x00000000cfef3fff] reserved
Xen: [mem 0x00000000cfef4000-0x00000000cfefffff] usable
Xen: [mem 0x00000000f8000000-0x00000000fbffffff] reserved
Xen: [mem 0x00000000fec00000-0x00000000fec00fff] reserved
Xen: [mem 0x00000000fec10000-0x00000000fec10fff] reserved
Xen: [mem 0x00000000fec20000-0x00000000fec20fff] reserved
Xen: [mem 0x00000000fed00000-0x00000000fed00fff] reserved
Xen: [mem 0x00000000fed61000-0x00000000fed70fff] reserved
Xen: [mem 0x00000000fed80000-0x00000000fed8ffff] reserved
Xen: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
Xen: [mem 0x00000000fef00000-0x00000000ffffffff] reserved
Xen: [mem 0x0000000100001000-0x000000022effffff] usable
NX (Execute Disable) protection: active
DMI 2.7 present.
DMI: AMD Pike/Pike, BIOS WPK2919N_Weekly_12_09_19 09/17/2012
e820: update [mem 0x00000000-0x0000ffff] usable ==> reserved
e820: remove [mem 0x000a0000-0x000fffff] usable
No AGP bridge found
e820: last_pfn = 0x22f000 max_arch_pfn = 0x400000000
e820: last_pfn = 0xcff00 max_arch_pfn = 0x400000000
initial memory mapped: [mem 0x00000000-0x022affff]
Base memory trampoline at [ffff880000096000] 96000 size 24576
init_memory_mapping: [mem 0x00000000-0x000fffff]
[mem 0x00000000-0x000fffff] page 4k
init_memory_mapping: [mem 0x21fe00000-0x21fe77fff]
[mem 0x21fe00000-0x21fe77fff] page 4k
init_memory_mapping: [mem 0x21c000000-0x21fdfffff]
[mem 0x21c000000-0x21fdfffff] page 4k
init_memory_mapping: [mem 0x200000000-0x21bffffff]
[mem 0x200000000-0x21bffffff] page 4k
init_memory_mapping: [mem 0x00100000-0xcec6dfff]
[mem 0x00100000-0xcec6dfff] page 4k
init_memory_mapping: [mem 0xcf5f4000-0xcf5f4fff]
[mem 0xcf5f4000-0xcf5f4fff] page 4k
init_memory_mapping: [mem 0xcf7fb000-0xcfc19fff]
[mem 0xcf7fb000-0xcfc19fff] page 4k
init_memory_mapping: [mem 0xcfef4000-0xcfefffff]
[mem 0xcfef4000-0xcfefffff] page 4k
init_memory_mapping: [mem 0x100001000-0x1ffffffff]
[mem 0x100001000-0x1ffffffff] page 4k
PGD 0

Oops: 0003 [#1] SMP 
Modules linked in:
CPU 0 
Pid: 0, comm: swapper Not tainted 3.6.0+ #3 AMD Pike/Pike
RIP: e030:[<ffffffff81cd778a>]  [<ffffffff81cd778a>] xen_set_pte_init+0x1/0x9
RSP: e02b:ffffffff81c01ae8  EFLAGS: 00010086
RAX: 80000001913d1063 RBX: ffff88021f63b1c8 RCX: 8000000000000163
RDX: 00000000000001ff RSI: 80000001913d1063 RDI: ffff88021f63b1c8
RBP: ffffffff81c01af8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 000000011b039000
R13: 000000000000003a R14: 000000011b03a000 R15: 000000011b039000
FS:  0000000000000000(0000) GS:ffffffff81cbe000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000001c0b000 CR4: 0000000000000660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 0000000000000000 DR7: 0000000000000000
Process swapper (pid: 0, threadinfo ffffffff81c00000, task ffffffff81c13410)
Stack:
 ffffffff81c01af8 ffffffff810330f5 ffffffff81c01b58 ffffffff816aa9f3
 8000000000000163 ffff88021f63c000 0000000200000000 000000011b039000
 ffffffff81c01b38 0000000000000000 000000011b000000 ffff88021f7146c0
Call Trace:
 [<ffffffff810330f5>] ? set_pte+0xb/0xd
 [<ffffffff816aa9f3>] phys_pte_init+0xd4/0x106
 [<ffffffff816aabe0>] phys_pmd_init+0x1bb/0x215
 [<ffffffff816aadf3>] phys_pud_init+0x1b9/0x218
 [<ffffffff816aaeff>] kernel_physical_mapping_init+0xad/0x14a
 [<ffffffff81682a1a>] init_memory_mapping+0x275/0x303
 [<ffffffff81ce6e62>] init_range_memory_mapping+0x8b/0xc8
 [<ffffffff81ce6f91>] init_mem_mapping+0xf2/0x162
 [<ffffffff81cd9d74>] setup_arch+0x682/0xaac
 [<ffffffff816af4ab>] ? printk+0x48/0x4a
 [<ffffffff81cd3868>] start_kernel+0x8e/0x3d8
 [<ffffffff81cd32d3>] x86_64_start_reservations+0xae/0xb2
 [<ffffffff81cd6dbc>] xen_start_kernel+0x63d/0x63f
Code: 00 00 48 c7 c7 f2 a8 aa 81 e8 ee 61 36 ff c7 05 59 10 06 00 01 00 00 00 5d c3 55 48 89 f7 48 89 e5 e8 95 cf 32 ff 31 c0 5d c3 55 <48> 89 37 48 89 e5 5d c3 55 48 89 e5 41 57 41 56 45 31 f6 41 55 
 RSP <ffffffff81c01ae8>
CR2: 0000000000000000
---[ end trace c2b54da46b5614cf ]---
 __  __            _  _    _____                    _        _     _      
 \ \/ /___ _ __   | || |  |___ /    _   _ _ __  ___| |_ __ _| |__ | | ___ 
  \  // _ \ '_ \  | || |_   |_ \ __| | | | '_ \/ __| __/ _` | '_ \| |/ _ \
  /  \  __/ | | | |__   _| ___) |__| |_| | | | \__ \ || (_| | |_) | |  __/
 /_/\_\___|_| |_|    |_|(_)____/    \__,_|_| |_|___/\__\__,_|_.__/|_|\___|

(XEN) Xen version 4.3-unstable (jshin@) (gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3) Thu Oct 18 10:52:04 CDT 2012 (XEN) Latest ChangeSet: Mon Oct 15 16:51:44 2012 +0100 26061:c1c549c4fe9e
(XEN) Bootloader: GRUB 1.99-21ubuntu3.4
(XEN) Command line: placeholder noreboot cpuinfo vpmu
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: V2; EDID transfer time: 1 seconds
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:

(XEN)  0000000000000000 - 000000000009cc00 (usable)
(XEN)  000000000009cc00 - 00000000000a0000 (reserved)
(XEN)  00000000000e0000 - 0000000000100000 (reserved)
(XEN)  0000000000100000 - 00000000cec6e000 (usable)
(XEN)  00000000cec6e000 - 00000000cedf2000 (reserved)
(XEN)  00000000cedf2000 - 00000000cf14a000 (ACPI NVS)
(XEN)  00000000cf14a000 - 00000000cf5f4000 (reserved)
(XEN)  00000000cf5f4000 - 00000000cf5f5000 (usable)
(XEN)  00000000cf5f5000 - 00000000cf7fb000 (ACPI NVS)
(XEN)  00000000cf7fb000 - 00000000cfc1a000 (usable)
(XEN)  00000000cfc1a000 - 00000000cfef4000 (reserved)
(XEN)  00000000cfef4000 - 00000000cff00000 (usable)
(XEN)  00000000f8000000 - 00000000fc000000 (reserved)
(XEN)  00000000fec00000 - 00000000fec01000 (reserved)
(XEN)  00000000fec10000 - 00000000fec11000 (reserved)
(XEN)  00000000fec20000 - 00000000fec21000 (reserved)
(XEN)  00000000fed00000 - 00000000fed01000 (reserved)
(XEN)  00000000fed61000 - 00000000fed71000 (reserved)
(XEN)  00000000fed80000 - 00000000fed90000 (reserved)
(XEN)  00000000fef00000 - 0000000100000000 (reserved)
(XEN)  0000000100001000 - 000000022f000000 (usable)
(XEN) ACPI: RSDP 000F0490, 0024 (r2 ALASKA)
(XEN) ACPI: XSDT CF133070, 005C (r1 ALASKA    A M I  1072009 AMI     10013)
(XEN) ACPI: FACP CF13EDF0, 010C (r5 ALASKA    A M I  1072009 AMI     10013)

(XEN) ACPI Warning (tbfadt-0232): FADT (revision 5) is longer than ACPI 2.0 version, truncating length 0x10C to 0xF4 [20070126] (XEN) ACPI Warning (tbfadt-0444): Optional field "Pm2ControlBlock" has zero address or length: 0000000000000000/1 [20070126]
(XEN) ACPI: DSDT CF133160, BC89 (r2 ALASKA A M I 0 INTL 20051117)
(XEN) ACPI: FACS CF143080, 0040

(XEN) ACPI: APIC CF13EF00, 009E (r3 ALASKA    A M I  1072009 AMI     10013)
(XEN) ACPI: FPDT CF13EFA0, 0044 (r1 ALASKA    A M I  1072009 AMI     10013)
(XEN) ACPI: MCFG CF13EFE8, 003C (r1 ALASKA    A M I  1072009 MSFT    10013)
(XEN) ACPI: HPET CF13F028, 0038 (r1 ALASKA    A M I  1072009 AMI         5)

(XEN) ACPI: SSDT CF13F060, 167C (r1 AMD POWERNOW 1 AMD 1)
(XEN) ACPI: IVRS CF1406E0, 00D8 (r1 AMD RD890S 202031 AMD 0)
(XEN) System RAM: 8160MB (8356052kB)
(XEN) No NUMA configuration found
(XEN) Faking a node at 0000000000000000-000000022f000000
(XEN) Domain heap initialised
(XEN) found SMP MP-table at 000fd820
(XEN) DMI 2.7 present.
(XEN) Using APIC driver default
(XEN) ACPI: PM-Timer IO Port: 0x808
(XEN) ACPI: ACPI SLEEP INFO: pm1x_cnt[804,0], pm1x_evt[800,0]
(XEN) ACPI: 32/64X FACS address mismatch in FADT - cf143080/0000000000000000, using 32
(XEN) ACPI: wakeup_vec[cf14308c], vec_size[20]
(XEN) ACPI: Local APIC address 0xfee00000
(XEN) ACPI: LAPIC (acpi_id[0x01] lapic_id[0x10] enabled)
(XEN) Processor #16 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x02] lapic_id[0x11] enabled)
(XEN) Processor #17 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x03] lapic_id[0x12] enabled)
(XEN) Processor #18 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x04] lapic_id[0x13] enabled)
(XEN) Processor #19 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x05] lapic_id[0x14] enabled)
(XEN) Processor #20 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x06] lapic_id[0x15] enabled)
(XEN) Processor #21 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x07] lapic_id[0x16] enabled)
(XEN) Processor #22 5:2 APIC version 16
(XEN) ACPI: LAPIC (acpi_id[0x08] lapic_id[0x17] enabled)
(XEN) Processor #23 5:2 APIC version 16
(XEN) ACPI: LAPIC_NMI (acpi_id[0xff] high edge lint[0x1])
(XEN) ACPI: IOAPIC (id[0x09] address[0xfec00000] gsi_base[0])
(XEN) IOAPIC[0]: apic_id 9, version 33, address 0xfec00000, GSI 0-23 (XEN) ACPI: IOAPIC (id[0x0a] address[0xfec20000] gsi_base[24])
(XEN) IOAPIC[1]: apic_id 10, version 33, address 0xfec20000, GSI 24-55 (XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 0 global_irq 2 dfl dfl)
(XEN) ACPI: INT_SRC_OVR (bus 0 bus_irq 9 global_irq 9 low level)
(XEN) ACPI: IRQ0 used by override.
(XEN) ACPI: IRQ2 used by override.
(XEN) ACPI: IRQ9 used by override.
(XEN) Enabling APIC mode: Flat. Using 2 I/O APICs
(XEN) ACPI: HPET id: 0x43538210 base: 0xfed00000
(XEN) Table is not found!
(XEN) Using ACPI (MADT) for SMP configuration information
(XEN) SMP: Allowing 8 CPUs (0 hotplug CPUs)
(XEN) IRQ limits: 56 GSI, 1496 MSI/MSI-X
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Initializing CPU#0
(XEN) Detected 3492.408 MHz processor.
(XEN) Initing memory sharing.
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 0(8) -> Processor 0, Compute Unit 0
(XEN) xstate_init: using cntxt_size: 0x3c0 and states: 0x4000000000000007 (XEN) AMD Fam15h machine check reporting enabled
(XEN) PCI: MCFG configuration 0: base e0000000 segment 0000 buses 00 - ff (XEN) PCI: Not using MCFG for segment 0000 bus 00-ff
(XEN) AMD-Vi: IOMMU 0 Enabled.
(XEN) AMD-Vi: Enabling global vector map
(XEN) I/O virtualisation enabled
(XEN) - Dom0 mode: Relaxed
(XEN) CPU0: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) ..TIMER: vector=0xF0 apic1=0 pin1=2 apic2=-1 pin2=-1
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 64 KiB.
(XEN) HVM: ASIDs enabled.
(XEN) SVM: Supported advanced features:

(XEN)  - Nested Page Tables (NPT)
(XEN)  - Last Branch Record (LBR) Virtualisation
(XEN)  - Next-RIP Saved on #VMEXIT
(XEN)  - VMCB Clean Bits
(XEN)  - DecodeAssists
(XEN)  - Pause-Intercept Filter
(XEN)  - TSC Rate MSR

(XEN) HVM: SVM enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB, 1GB
(XEN) Booting processor 1/17 eip 8c000
(XEN) Initializing CPU#1
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 1(8) -> Processor 0, Compute Unit 0
(XEN) CPU1: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 2/18 eip 8c000
(XEN) Initializing CPU#2
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 2(8) -> Processor 0, Compute Unit 1
(XEN) CPU2: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 3/19 eip 8c000
(XEN) Initializing CPU#3
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 3(8) -> Processor 0, Compute Unit 1
(XEN) CPU3: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 4/20 eip 8c000
(XEN) Initializing CPU#4
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 4(8) -> Processor 0, Compute Unit 2
(XEN) CPU4: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 5/21 eip 8c000
(XEN) Initializing CPU#5
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 5(8) -> Processor 0, Compute Unit 2
(XEN) CPU5: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 6/22 eip 8c000
(XEN) Initializing CPU#6
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 6(8) -> Processor 0, Compute Unit 3
(XEN) CPU6: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) Booting processor 7/23 eip 8c000
(XEN) Initializing CPU#7
(XEN) CPU: L1 I cache 64K (64 bytes/line), D cache 16K (64 bytes/line) (XEN) CPU: L2 Cache: 2048K (64 bytes/line)
(XEN) CPU 7(8) -> Processor 0, Compute Unit 3
(XEN) CPU7: AMD Eng Sample, 1D358151W8K54_40/35/22_2/8 stepping 00
(XEN) Brought up 8 CPUs
(XEN) microcode: collect_cpu_info: patch_id=0x600081e
(XEN) ACPI sleep modes: S3
(XEN) MCA: Use hw thresholding to adjust polling frequency
(XEN) mcheck_poll: Machine check polling timer started.
(XEN) *** LOADING DOMAIN 0 ***
(XEN) elf_parse_binary: phdr: paddr=0x1000000 memsz=0xb9d000
(XEN) elf_parse_binary: phdr: paddr=0x1c00000 memsz=0xbd0e8
(XEN) elf_parse_binary: phdr: paddr=0x1cbe000 memsz=0x14100
(XEN) elf_parse_binary: phdr: paddr=0x1cd3000 memsz=0x5dd000
(XEN) elf_parse_binary: memory: 0x1000000 -> 0x22b0000
(XEN) elf_xen_parse_note: GUEST_OS = "linux"
(XEN) elf_xen_parse_note: GUEST_VERSION = "2.6"
(XEN) elf_xen_parse_note: XEN_VERSION = "xen-3.0"
(XEN) elf_xen_parse_note: VIRT_BASE = 0xffffffff80000000
(XEN) elf_xen_parse_note: ENTRY = 0xffffffff81cd3210
(XEN) elf_xen_parse_note: HYPERCALL_PAGE = 0xffffffff81001000
(XEN) elf_xen_parse_note: FEATURES = "!writable_page_tables|pae_pgdir_above_4gb" (XEN) elf_xen_parse_note: PAE_MODE = "yes"
(XEN) elf_xen_parse_note: LOADER = "generic"
(XEN) elf_xen_parse_note: unknown xen elf note (0xd)
(XEN) elf_xen_parse_note: SUSPEND_CANCEL = 0x1
(XEN) elf_xen_parse_note: HV_START_LOW = 0xffff800000000000
(XEN) elf_xen_parse_note: PADDR_OFFSET = 0x0
(XEN) elf_xen_addr_calc_check: addresses:

(XEN)     virt_base        = 0xffffffff80000000
(XEN)     elf_paddr_offset = 0x0
(XEN)     virt_offset      = 0xffffffff80000000
(XEN)     virt_kstart      = 0xffffffff81000000
(XEN)     virt_kend        = 0xffffffff822b0000
(XEN)     virt_entry       = 0xffffffff81cd3210
(XEN)     p2m_base         = 0xffffffffffffffff

(XEN) Xen kernel: 64-bit, lsb, compat32
(XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x22b0000 (XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN) Dom0 alloc.: 0000000220000000->0000000224000000 (2010797 pages to be allocated)
(XEN) VIRTUAL MEMORY ARRANGEMENT:

(XEN)  Loaded kernel: ffffffff81000000->ffffffff822b0000
(XEN)  Init. ramdisk: ffffffff822b0000->ffffffff822b0000
(XEN)  Phys-Mach map: ffffffff822b0000->ffffffff83227568
(XEN)  Start info:    ffffffff83228000->ffffffff832284b4
(XEN)  Page tables:   ffffffff83229000->ffffffff83246000
(XEN)  Boot stack:    ffffffff83246000->ffffffff83247000
(XEN)  TOTAL:         ffffffff80000000->ffffffff83400000
(XEN)  ENTRY ADDRESS: ffffffff81cd3210

(XEN) Dom0 has maximum 8 VCPUs
(XEN) elf_load_binary: phdr 0 at 0xffffffff81000000 -> 0xffffffff81b9d000 (XEN) elf_load_binary: phdr 1 at 0xffffffff81c00000 -> 0xffffffff81cbd0e8 (XEN) elf_load_binary: phdr 2 at 0xffffffff81cbe000 -> 0xffffffff81cd2100 (XEN) elf_load_binary: phdr 3 at 0xffffffff81cd3000 -> 0xffffffff81d71000 (XEN) Scrubbing Free RAM: .done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: All
(XEN) Guest Loglevel: All
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen) (XEN) Freed 244kB init memory.
(XEN) Domain 0 crashed: 'noreboot' set - not rebooting.

Jacob,
thanks for testing!

Yinghai, it might be useful for you to try your patch series on Xen. It is pretty simple, considering that you only need the hypervisor. Just follow these steps:

- clone the xen-unstable git mirror
git clone git://xenbits.xen.org/xen.git

- compile and install xen
make xen
cp xen/xen.gz /boot

- add an entry to grub2.cfg
see the following example, note the multiboot line and the placeholder argument after vmlinuz:

menuentry 'GNU/Linux, with Linux 2.6.32.40-pv' --class gnu-linux --class gnu --class os {
        recordfail
        insmod part_msdos
        insmod ext2
        search --no-floppy --fs-uuid --set=root 016e7c8a-4bdd-4873-92dd-d71171a49d6d
        set root='(/dev/sda,msdos2)'
        search --no-floppy --fs-uuid --set=root 016e7c8a-4bdd-4873-92dd-d71171a49d6d
        multiboot /boot/xen-4.2-unstable.gz
        module /boot/vmlinuz-2.6.32.40-pv placeholder root=UUID=016e7c8a-4bdd-4873-92dd-d71171a49d6d dom0_mem=1024 console=tty  quiet splash vt.handoff=7
        module /boot/initrd.img-2.6.32.40-pv
}

- reboot and enjoy!

yes, i tried dom0 with xen 32bit and 64bit, all can boot well.

but did not test with domU.

Thanks

Yinghai

i tested dom0 conf on 32 bit and 64 bit, they are all working.

and just now I tried with mem=8944m, and they are still working.

anyway, can you please updated -v5 for-x86-mm branch ? I removed mark_page_ro workaround according to stefano

Thanks

Yinghai

Just tested -v5 with Xen, and Dom0 no longer dies. Also tried it on HVM DomU and also boots fine.

Also tested on our 1TB machine, and it looks good, only E820_RAM are mapped:

[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x00000000000983ff] usable
[    0.000000] BIOS-e820: [mem 0x0000000000098400-0x000000000009ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000000d2000-0x00000000000fffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000c7ebffff] usable
[    0.000000] BIOS-e820: [mem 0x00000000c7ec0000-0x00000000c7ed7fff] ACPI data
[    0.000000] BIOS-e820: [mem 0x00000000c7ed8000-0x00000000c7ed9fff] ACPI NVS
[    0.000000] BIOS-e820: [mem 0x00000000c7eda000-0x00000000c7ffffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fec00000-0x00000000fec0ffff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved
[    0.000000] BIOS-e820: [mem 0x00000000fff00000-0x00000000ffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000000e037ffffff] usable
[    0.000000] BIOS-e820: [mem 0x000000e038000000-0x000000ffffffffff] reserved
[    0.000000] BIOS-e820: [mem 0x0000010000000000-0x0000011ffeffffff] usable

...

[    0.000000] e820: last_pfn = 0xc7ec0 max_arch_pfn = 0x400000000
[    0.000000] initial memory mapped: [mem 0x00000000-0x1fffffff]
[    0.000000] Base memory trampoline at [ffff880000092000] 92000 size 24576
[    0.000000] Using GB pages for direct mapping
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000]  [mem 0x00000000-0x000fffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x11ffee00000-0x11ffeffffff]
[    0.000000]  [mem 0x11ffee00000-0x11ffeffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x11ffc000000-0x11ffedfffff]
[    0.000000]  [mem 0x11ffc000000-0x11ffedfffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x11f80000000-0x11ffbffffff]
[    0.000000]  [mem 0x11f80000000-0x11fbfffffff] page 1G
[    0.000000]  [mem 0x11fc0000000-0x11ffbffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x11000000000-0x11f7fffffff]
[    0.000000]  [mem 0x11000000000-0x11f7fffffff] page 1G
[    0.000000] init_memory_mapping: [mem 0x00100000-0xc7ebffff]
[    0.000000]  [mem 0x00100000-0x001fffff] page 4k
[    0.000000]  [mem 0x00200000-0x3fffffff] page 2M
[    0.000000]  [mem 0x40000000-0xbfffffff] page 1G
[    0.000000]  [mem 0xc0000000-0xc7dfffff] page 2M
[    0.000000]  [mem 0xc7e00000-0xc7ebffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x100000000-0xe037ffffff]
[    0.000000]  [mem 0x100000000-0xdfffffffff] page 1G
[    0.000000]  [mem 0xe000000000-0xe037ffffff] page 2M
[    0.000000] init_memory_mapping: [mem 0x10000000000-0x10fffffffff]
[    0.000000]  [mem 0x10000000000-0x10fffffffff] page 1G

Thanks!!

ok, will post -v5 to the list.

yeah, I was confused how xen could RO page for page table.

yes, removed.

actually alloc_... should be always return mapped.

Thanks

Yinghai

fyi, the way to do that is to revert it the offending patch.

So which branch should I try out? Do you have one with all of the required patches so I can just do a 3.7-rc3 'git pull' and try it out?

add for-x86-mm-test branch, and it is based on 3.7-rc3, and merged with for-x86-mm branch.

so you can try
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-x86-mm-test

there is conflicts between for-x86-mm and 3.7-rc3, and attached patch could be used to fix them

Thanks

Yinghai

---
 arch/x86/kernel/setup.c     |   29 ---------------------
 arch/x86/mm/init.c          |   59 --------------------------------------------
 arch/x86/platform/efi/efi.c |   15 +----------
 3 files changed, 2 insertions(+), 101 deletions(-)

Index: linux-yinghai/arch/x86/kernel/setup.c
===================================================================
@@ -921,35 +921,6 @@ void __init setup_arch(char **cmdline_p)
 
 	init_mem_mapping();
 
-<<<<<<< HEAD
-	/* max_pfn_mapped is updated here */
-	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
-	max_pfn_mapped = max_low_pfn_mapped;
-
-#ifdef CONFIG_X86_64
-	if (max_pfn > max_low_pfn) {
-		int i;
-		unsigned long start, end;
-		unsigned long start_pfn, end_pfn;
-
-		for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn,
-							 NULL) {
-
-			end = PFN_PHYS(end_pfn);
-			if (end <= (1UL<<32))
-				continue;
-
-			start = PFN_PHYS(start_pfn);
-			max_pfn_mapped = init_memory_mapping(
-						max((1UL<<32), start), end);
-		}
-
-		/* can we preseve max_low_pfn ?*/
-		max_low_pfn = max_pfn;
-	}
-#endif
-=======
->>>>>>> for-x86-mm
 	memblock.current_limit = get_max_mapped();
 	dma_contiguous_reserve(0);
 

Index: linux-yinghai/arch/x86/platform/efi/efi.c
===================================================================
@@ -835,11 +835,7 @@ void __init efi_enter_virtual_mode(void)
 	efi_memory_desc_t *md, *prev_md = NULL;
 	efi_status_t status;
 	unsigned long size;
-<<<<<<< HEAD
-	u64 end, systab, end_pfn;
-=======
-	u64 end, systab, addr, npages, start_pfn, end_pfn;
->>>>>>> for-x86-mm
+	u64 end, systab, start_pfn, end_pfn;
 	void *p, *va, *new_memmap = NULL;
 	int count = 0;
 

@@ -894,14 +890,7 @@ void __init efi_enter_virtual_mode(void)
 
 		start_pfn = PFN_DOWN(md->phys_addr);
 		end_pfn = PFN_UP(end);
-<<<<<<< HEAD
-		if (end_pfn <= max_low_pfn_mapped
-		    || (end_pfn > (1UL << (32 - PAGE_SHIFT))
-			&& end_pfn <= max_pfn_mapped)) {
-=======
-
-		if (pfn_range_is_mapped(start_pfn, end_pfn))
->>>>>>> for-x86-mm
+		if (pfn_range_is_mapped(start_pfn, end_pfn)) {
 			va = __va(md->phys_addr);
 
 			if (!(md->attribute & EFI_MEMORY_WB))

Peter/Ingo,

can you put for-x86-mm-test to tip for more testing?

or you want to rebase the whole patchset?

Thanks

Yinghai

I am travelling at the moment... I hope to be able to look at it Sunday.

Sent from my mobile phone. Please excuse brevity and lack of formatting.

All,

please check branch that is rebased on top of 3.7-rc4.
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-x86-mm

Stefano, Konrad,
please check them with xen parts, and give your acked-by or Reviewed-by accordingly.

Thanks

Yinghai

From: Yinghai Lu <[email protected]>
Date: Mon, 5 Nov 2012 11:54:12 -0800
Subject: [PATCH v6 00/42] x86, mm: map ram from top-down with BRK and memblock.

rebase patchset together tip/x86/mm2 on top of linus v3.7-rc4

so this one include patchset : x86, mm: init_memory_mapping cleanup in tip/x86/mm2
---
Current kernel init memory mapping between [0, TOML) and [4G, TOMH) Some AMD systems have mem hole between 4G and TOMH, around 1T. According to HPA, we should only mapping ram range.
1. Seperate calculate_table_space_size and find_early_page_table out with init_memory_mapping.
2. For all ranges, will allocate page table one time
3. init mapping for ram range one by one.
---

pre mapping page table patcheset includes:
1. use brk to mapping first PMD_SIZE range under end of ram.
2. top down to initialize page table range by range.
3. get rid of calculate_page_table, and find_early_page_table.
4. remove early_ioremap in page table accessing.
5. remove workaround in xen to mark page RO.

v2: changes, update xen interface about pagetable_reserve, so not
use pgt_buf_* in xen code directly.
v3: use range top-down to initialize page table, so will not use
calculating/find early table anymore.
also reorder the patches sequence.
v4: add mapping_mark_page_ro to fix xen, also move pgt_buf_* to init.c
and merge alloc_low_page(), and for 32bit need to add alloc_low_pages to fix 32bit kmap setting.
v5: remove mark_page_ro workaround and add another 5 cleanup patches.
v6: rebase on v3.7-rc4 and add 4 cleanup patches.

could be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git
for-x86-mm

1b66ccf: mm: Kill NO_BOOTMEM version free_all_bootmem_node() 0332736: sparc, mm: Remove calling of free_all_bootmem_node() 0f88d27: x86, mm: kill numa_64.h
10c4c68: x86, mm: kill numa_free_all_bootmem()
0187d6e: x86, mm: Let "memmap=" take more entries one time 2c20fd0: x86, mm: Use clamp_t() in init_range_memory_mapping 770db30: x86, mm: Move after_bootmem to mm_internel.h
d9bd282: x86, mm: Unifying after_bootmem for 32bit and 64bit 003d654: x86, mm: use limit_pfn for end pfn
29f27b8: x86, mm: use pfn instead of pos in split_mem_range 8edaab8: x86, mm: use PFN_DOWN in split_mem_range()
e652c73: x86, mm: use round_up/down in split_mem_range() 5fd1391: x86, mm: Add check before clear pte above max_low_pfn on 32bit
f4fd136: x86, mm: Move function declaration into mm_internal.h
ea421df: x86, mm: change low/hignmem_pfn_init to static on 32bit 867525b: x86, mm: Move init_gbpages() out of setup.c
97fb23a: x86, mm: Move back pgt_buf_* to mm/init.c
ba55b2f: x86, mm: only call early_ioremap_page_table_range_init() once
bb6d2d9: x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages 6bc7e9f: x86, mm: Add alloc_low_pages(num)
d90df25: x86, mm, Xen: Remove mapping_pagetable_reserve()
f6699d2: x86, mm: Move min_pfn_mapped back to mm/init.c 675697b: x86, mm: Merge alloc_low_page between 64bit and 32bit
a14a382: x86, mm: Remove parameter in alloc_low_page for 64bit
a0d7a52: x86, mm: Remove early_memremap workaround for page table accessing on 64bit
384a79d: x86, mm: setup page table in top-down
16252f2: x86, mm: Break down init_all_memory_mapping
255a0bf: x86, mm: Don't clear page table if range is ram 4bc70c5: x86, mm: Use big page size for small memory range
dc62aa8: x86, mm: Align start address to correct big page size 18f374c: x86: Only direct map addresses that are marked as E820_RAM 150387c: x86: Fixup code testing if a pfn is direct mapped 45cb049: x86: if kernel .text .data .bss are not marked as E820_RAM, complain and fix
8d0b8bd: x86, mm: Set memblock initial limit to 1M
6c712cf: x86, mm: Separate out calculate_table_space_size() 33b0520: x86, mm: Find early page table buffer together
a95ff4b: x86, mm: Change find_early_table_space() paramters
ea564f8: x86, mm: Revert back good_end setting for 64bit 912c686: x86, mm: Move init_memory_mapping calling out of setup.c 47cfa63: x86, mm: Move down find_early_table_space()
060ed6c: x86, mm: Split out split_mem_range from init_memory_mapping 2ad38b5: x86, mm: Add global page_size_mask and probe one time only

 arch/sparc/mm/init_64.c              |   24 +-
 arch/x86/include/asm/init.h          |   21 +--
 arch/x86/include/asm/numa.h          |    2 -
 arch/x86/include/asm/numa_64.h       |    6 -
 arch/x86/include/asm/page_types.h    |    2 +
 arch/x86/include/asm/pgtable.h       |    2 +
 arch/x86/include/asm/pgtable_types.h |    1 -
 arch/x86/include/asm/x86_init.h      |   12 -
 arch/x86/kernel/acpi/boot.c          |    1 -
 arch/x86/kernel/cpu/amd.c            |    9 +-
 arch/x86/kernel/cpu/intel.c          |    1 -
 arch/x86/kernel/e820.c               |   16 ++-
 arch/x86/kernel/setup.c              |   70 ++----
 arch/x86/kernel/x86_init.c           |    4 -
 arch/x86/mm/init.c                   |  445 ++++++++++++++++++++++------------
 arch/x86/mm/init_32.c                |  106 +++++---
 arch/x86/mm/init_64.c                |  140 ++++-------
 arch/x86/mm/mm_internal.h            |   19 ++
 arch/x86/mm/numa_64.c                |   13 -
 arch/x86/platform/efi/efi.c          |    7 +-
 arch/x86/xen/mmu.c                   |   28 ---
 include/linux/mm.h                   |    1 -
 mm/nobootmem.c                       |   14 -
 23 files changed, 480 insertions(+), 464 deletions(-)
 delete mode 100644 arch/x86/include/asm/numa_64.h
 create mode 100644 arch/x86/mm/mm_internal.h

1.7.7

Now NO_BOOTMEM version free_all_bootmem_node() does not really do free_bootmem at all, and it only call register_page_bootmem_info_node instead.

That is confusing, try to kill that free_all_bootmem_node().

Before that, this patch will remove numa_free_all_bootmem().

That function could be replaced with register_page_bootmem_info() and free_all_bootmem();

---
 arch/x86/include/asm/numa_64.h |    2 --
 arch/x86/mm/init_64.c          |   15 +++++++++++----
 arch/x86/mm/numa_64.c          |   13 -------------
 3 files changed, 11 insertions(+), 19 deletions(-)

index 0c05f7a..fe4d2d4 100644
@@ -1,6 +1,4 @@
 #ifndef _ASM_X86_NUMA_64_H
 #define _ASM_X86_NUMA_64_H
 
-extern unsigned long numa_free_all_bootmem(void);
-
 #endif /* _ASM_X86_NUMA_64_H */

index 1d53def..4178530 100644
@@ -629,6 +629,16 @@ EXPORT_SYMBOL_GPL(arch_add_memory);
 
 static struct kcore_list kcore_vsyscall;
 
+static void __init register_page_bootmem_info(void)
+{
+#ifdef CONFIG_NUMA
+	int i;
+
+	for_each_online_node(i)
+		register_page_bootmem_info_node(NODE_DATA(i));
+#endif
+}
+
 void __init mem_init(void)
 {
 	long codesize, reservedpages, datasize, initsize;

@@ -641,11 +651,8 @@ void __init mem_init(void)
 	reservedpages = 0;
 
 	/* this will put all low memory onto the freelists */
-#ifdef CONFIG_NUMA
-	totalram_pages = numa_free_all_bootmem();
-#else
+	register_page_bootmem_info();
 	totalram_pages = free_all_bootmem();
-#endif
 
 	absent_pages = absent_pages_in_range(0, max_pfn);
 	reservedpages = max_pfn - totalram_pages - absent_pages;

index 92e2711..9405ffc 100644
@@ -10,16 +10,3 @@ void __init initmem_init(void)
 {
 	x86_numa_init();
 }
-
-unsigned long __init numa_free_all_bootmem(void)
-{
-	unsigned long pages = 0;
-	int i;
-
-	for_each_online_node(i)
-		pages += free_all_bootmem_node(NODE_DATA(i));
-
-	pages += free_low_memory_core_early(MAX_NUMNODES);
-
-	return pages;
-}

1.7.7

---
 arch/x86/include/asm/numa.h    |    2 --
 arch/x86/include/asm/numa_64.h |    4 ----
 arch/x86/kernel/acpi/boot.c    |    1 -
 arch/x86/kernel/cpu/amd.c      |    1 -
 arch/x86/kernel/cpu/intel.c    |    1 -
 arch/x86/kernel/setup.c        |    3 ---
 6 files changed, 0 insertions(+), 12 deletions(-)
 delete mode 100644 arch/x86/include/asm/numa_64.h

index 49119fc..52560a2 100644
@@ -54,8 +54,6 @@ static inline int numa_cpu_node(int cpu)
 
 #ifdef CONFIG_X86_32
 # include <asm/numa_32.h>
-#else
-# include <asm/numa_64.h>
 #endif
 
 #ifdef CONFIG_NUMA

deleted file mode 100644
index fe4d2d4..0000000
@@ -1,4 +0,0 @@
-#ifndef _ASM_X86_NUMA_64_H
-#define _ASM_X86_NUMA_64_H
-
-#endif /* _ASM_X86_NUMA_64_H */

index e651f7a..4b23aa1 100644
@@ -51,7 +51,6 @@ EXPORT_SYMBOL(acpi_disabled);
 
 #ifdef	CONFIG_X86_64
 # include <asm/proto.h>
-# include <asm/numa_64.h>
 #endif				/* X86 */
 
 #define BAD_MADT_ENTRY(entry, end) (					    \

index 9619ba6..913f94f 100644
@@ -12,7 +12,6 @@
 #include <asm/pci-direct.h>
 
 #ifdef CONFIG_X86_64
-# include <asm/numa_64.h>
 # include <asm/mmconfig.h>
 # include <asm/cacheflush.h>
 #endif

index 198e019..3b547cc 100644
@@ -17,7 +17,6 @@
 
 #ifdef CONFIG_X86_64
 #include <linux/topology.h>
-#include <asm/numa_64.h>
 #endif
 
 #include "cpu.h"

index 457de1d..8b0fb6fd 100644
@@ -108,9 +108,6 @@
 #include <asm/topology.h>
 #include <asm/apicdef.h>
 #include <asm/amd_nb.h>
-#ifdef CONFIG_X86_64
-#include <asm/numa_64.h>
-#endif
 #include <asm/mce.h>
 #include <asm/alternative.h>
 #include <asm/prom.h>

1.7.7

Now NO_BOOTMEM version free_all_bootmem_node() does not really do free_bootmem at all, and it only call register_page_bootmem_info_node instead.

That is confusing, try to kill that free_all_bootmem_node().

Before that, this patch will remove calling of free_all_bootmem_node()

We add register_page_bootmem_info() to call register_page_bootmem_info_node directly.

Also could use free_all_bootmem() for numa case, and it is just the same as free_low_memory_core_early().

---
 arch/sparc/mm/init_64.c |   24 +++++++++++-------------
 1 files changed, 11 insertions(+), 13 deletions(-)

index 9e28a11..b24bac2 100644
@@ -2021,6 +2021,16 @@ static void __init patch_tlb_miss_handler_bitmap(void)
 	flushi(&valid_addr_bitmap_insn[0]);
 }
 
+static void __init register_page_bootmem_info(void)
+{
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+	int i;
+
+	for_each_online_node(i)
+		if (NODE_DATA(i)->node_spanned_pages)
+			register_page_bootmem_info_node(NODE_DATA(i));
+#endif
+}
 void __init mem_init(void)
 {
 	unsigned long codepages, datapages, initpages;

@@ -2038,20 +2048,8 @@ void __init mem_init(void)
 
 	high_memory = __va(last_valid_pfn << PAGE_SHIFT);
 
-#ifdef CONFIG_NEED_MULTIPLE_NODES
-	{
-		int i;
-		for_each_online_node(i) {
-			if (NODE_DATA(i)->node_spanned_pages != 0) {
-				totalram_pages +-					free_all_bootmem_node(NODE_DATA(i));
-			}
-		}
-		totalram_pages += free_low_memory_core_early(MAX_NUMNODES);
-	}
-#else
+	register_page_bootmem_info();
 	totalram_pages = free_all_bootmem();
-#endif
 
 	/* We subtract one to account for the mem_map_zero page
 	 * allocated below.

1.7.7

From: Yinghai Lu <[email protected]>
Date: Mon, 5 Nov 2012 12:27:42 -0800

Now NO_BOOTMEM version free_all_bootmem_node() does not really do free_bootmem at all, and it only call register_page_bootmem_info_node for online nodes instead.

That is confusing.

We can kill that free_all_bootmem_node(), after we kill two callings in x86 and sparc.

---
 mm/nobootmem.c |   14 --------------
 1 files changed, 0 insertions(+), 14 deletions(-)

index 714d5d6..f22c228 100644
@@ -141,20 +141,6 @@ unsigned long __init free_low_memory_core_early(int nodeid)
 }
 
 /**
- * free_all_bootmem_node - release a node's free pages to the buddy allocator
- * @pgdat: node to be released
- *
- * Returns the number of pages actually released.
- */
-unsigned long __init free_all_bootmem_node(pg_data_t *pgdat)
-{
-	register_page_bootmem_info_node(pgdat);
-
-	/* free_low_memory_core_early(MAX_NUMNODES) will be called later */
-	return 0;
-}
-
-/**
  * free_all_bootmem - release free pages to the buddy allocator
  *
  * Returns the number of pages actually released.

1.7.7

I did a overnight test and it passed that. Let me do a couple of more of bootups with various memory configurations (1GB, 2GB, 3333M, 4G, 8GB, 16GB, 32GB) to get a good feel.

Thanks!

I ran in a problem with launching an 8GB guest. When launching a 4GB it worked fine, but with 8GB I get:

.000000] init_memory_mapping: [mem 0x1f4000000-0x1f47fffff]

[    0.000000]  [mem 0x1f4000000-0x1f47fffff] page 4k
[    0.000000] memblock_reserve: [0x000001f311c000-0x000001f311d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311b000-0x000001f311c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311a000-0x000001f311b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3119000-0x000001f311a000] alloc_low_pages+0x103/0x130
[    0.000000] Kernel panic - not syncing: initrd too large to handle, disabling initrd (348401664 needed, 524288 available)
[    0.000000] 
[    0.000000] Pid: 0, comm: swapper Not tainted 3.7.0-rc4upstream-00042-g1b66ccf #1
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff81633a5c>] panic+0xbf/0x1df
[    0.000000]  [<ffffffff81ac00e1>] setup_arch+0x728/0xb29
[    0.000000]  [<ffffffff81633c48>] ? printk+0x48/0x4a
[    0.000000]  [<ffffffff81aba897>] start_kernel+0x90/0x39e
[    0.000000]  [<ffffffff81aba356>] x86_64_start_reservations+0x131/0x136
[    0.000000]  [<ffffffff81abca38>] xen_start_kernel+0x546/0x548

Attaching the full log.

# cat /tm est.xm
extra="console=hvc0 debug earlyprintk=xen memblock=debug"
kernel="/mnt/lab/bootstrap-x86_64/vmlinuz"
ramdisk="/mnt/lab/bootstrap-x86_64/initramfs.cpio.gz"
memory=8000
vcpus=1
maxvcpus=3
name="bootstrap-x86_64"
on_crash="preserve"
vif = [ 'mac=00:0F:4B:00:00:68, bridge=switch' ]
#vfb = [ 'vnc=1, vnclisten=0.0.0.0,vncunused=1']
vnc=1
vnclisten="0.0.0.0"
disk=['phy:/dev/guests/bootstrap-x86_64,xvda,w']
# xm create -c /test.xm
Using config file "/test.xm".
[  538.086293] device vif4.0 entered promiscuous mode
[  538.097636] IPv6: ADDRCONF(NETDEV_UP): vif4.0: link is not ready
mapping kernel into physical memory
Started domain bootstrap-x86_64 (id=4)
about to get started...
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Linux version 3.7.0-rc4upstream-00042-g1b66ccf ([email protected]) (gcc version 4.4.4 20100503 (Red Hat 4.4.4-2) (GCC) ) #1 SMP Wed Nov 7 18:10:00 EST 2012
[    0.000000] Command line: console=hvc0 debug earlyprintk=xen memblock=debug
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[    0.000000] Xen: [mem 0x0000000000100000-0x00000001f47fffff] usable
[    0.000000] bootconsole [xenboot0] enabled
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] DMI not present or invalid.
[    0.000000] e820: update [mem 0x00000000-0x0000ffff] usable ==> reserved
[    0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[    0.000000] No AGP bridge found
[    0.000000] e820: last_pfn = 0x1f4800 max_arch_pfn = 0x400000000
[    0.000000] e820: la 0x1f4790000 reserved size = 0x17139000
[    0.000000]  memory.cnt  = 0x2
[    0.000000]  memory[0x0]	[0x00000000010000-0x0000000009ffff], 0x90000 bytes
[    0.000000]  memory[0x1]	[0x00000000100000-0x000001f47fffff], 0x1f4700000 bytes
[    0.000000]  reserved.cnt  = 0x4
[    0.000000]  reserved[0x0]	[0x00000001000000-0x00000001c92fff], 0xc93000 bytes
[    0.000000]  reserved[0x1]	[0x00000002095000-0x00000017c7afff], 0x15be6000 bytes
[    0.000000]  reserved[0x2]	[0x00000017c7e000-0x00000017d3dfff], 0xc0000 bytes
[    0.000000]  reserved[0x3]	[0x000001f4000000-0x000001f47fffff], 0x800000 bytes
[    0.000000] initial memory mapped: [mem 0x00000000-0x16cd7fff]
[    0.000000] memblock_reserve: [0x0000000009a000-0x000000000a0000] setup_real_mode+0x69/0x19b
[    0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000]  [mem 0x00000000-0x000fffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x1f3e00000-0x1f3ffffff]
[    0.000000]  [mem 0x1f3e00000-0x1f3ffffff] page 4k
[    0.000000] init_memory_mapping: [mem 0x1f0000000-0x1f3dfffff]
[    0.000000]  [mem 0x1f0000000-0x1f3dfffff] page 4k
[    0.000000] memblock_reserve: [0x000001f3fff000-0x000001f4000000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ffe000-0x000001f3fff000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ffd000-0x000001f3ffe000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ffc000-0x000001f3ffd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ffb000-0x000001f3ffc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ffa000-0x000001f3ffb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff9000-0x000001f3ffa000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff8000-0x000001f3ff9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff7000-0x000001f3ff8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff6000-0x000001f3ff7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff5000-0x000001f3ff6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff4000-0x000001f3ff5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff3000-0x000001f3ff4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff2000-0x000001f3ff3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff1000-0x000001f3ff2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ff0000-0x000001f3ff1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fef000-0x000001f3ff0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fee000-0x000001f3fef000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fed000-0x000001f3fee000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fec000-0x000001f3fed000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3feb000-0x000001f3fec000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fea000-0x000001f3feb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe9000-0x000001f3fea000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe8000-0x000001f3fe9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe7000-0x000001f3fe8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe6000-0x000001f3fe7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe5000-0x000001f3fe6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe4000-0x000001f3fe5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe3000-0x000001f3fe4000] alloc_low_pages+0x103/0x130
[    0.000000] init_memory_mapping: [mem 0x180000000-0x1efffffff]
[    0.000000]  [mem 0x180000000-0x1efffffff] page 4k
[    0.000000] memblock_reserve: [0x000001f3fe2000-0x000001f3fe3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe1000-0x000001f3fe2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fe0000-0x000001f3fe1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fdf000-0x000001f3fe0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fde000-0x000001f3fdf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fdd000-0x000001f3fde000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3fdc000-0x000001f3fdd000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3f52000-0x000001f3f53000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3f50000-0x000001f3f51000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3f42000-0x000001f3f43000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3f30000-0x000001f3f31000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3f2f000-0x000001f3f30000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3ec4000-0x000001f3ec5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ec3000-0x000001f3ec4000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3ebf000-0x000001f3ec0000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3eb2000-0x000001f3eb3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3eb1000-0x000001f3eb2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3eb0000-0x000001f3eb1000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3ea7000-0x000001f3ea8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea6000-0x000001f3ea7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea5000-0x000001f3ea6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea4000-0x000001f3ea5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea3000-0x000001f3ea4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea2000-0x000001f3ea3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea1000-0x000001f3ea2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ea0000-0x000001f3ea1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e9f000-0x000001f3ea0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e9e000-0x000001f3e9f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e9d000-0x000001f3e9e000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e95000-0x000001f3e96000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e94000-0x000001f3e95000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e93000-0x000001f3e94000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e92000-0x000001f3e93000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e91000-0x000001f3e92000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e90000-0x000001f3e91000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8f000-0x000001f3e90000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8e000-0x000001f3e8f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8d000-0x000001f3e8e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8c000-0x000001f3e8d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8b000-0x000001f3e8c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e8a000-0x000001f3e8b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e89000-0x000001f3e8a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e88000-0x000001f3e89000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e87000-0x000001f3e88000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e86000-0x000001f3e87000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e85000-0x000001f3e86000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e84000-0x000001f3e85000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e83000-0x000001f3e84000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e82000-0x000001f3e83000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e81000-0x000001f3e82000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e80000-0x000001f3e81000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e7f000-0x000001f3e80000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e7e000-0x000001f3e7f000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e45000-0x000001f3e46000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e36000-0x000001f3e37000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e35000-0x000001f3e36000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e28000-0x000001f3e29000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e27000-0x000001f3e28000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e26000-0x000001f3e27000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e25000-0x000001f3e26000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e24000-0x000001f3e25000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e22000-0x000001f3e23000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e21000-0x000001f3e22000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e20000-0x000001f3e21000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e1a000-0x000001f3e1b000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e18000-0x000001f3e19000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e17000-0x000001f3e18000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e16000-0x000001f3e17000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e15000-0x000001f3e16000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e14000-0x000001f3e15000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e13000-0x000001f3e14000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e12000-0x000001f3e13000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e11000-0x000001f3e12000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e10000-0x000001f3e11000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e0f000-0x000001f3e10000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e0a000-0x000001f3e0b000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e07000-0x000001f3e08000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e06000-0x000001f3e07000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3e04000-0x000001f3e05000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e03000-0x000001f3e04000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e02000-0x000001f3e03000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e01000-0x000001f3e02000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3e00000-0x000001f3e01000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dff000-0x000001f3e00000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dfe000-0x000001f3dff000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dfd000-0x000001f3dfe000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dfc000-0x000001f3dfd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dfb000-0x000001f3dfc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dfa000-0x000001f3dfb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df9000-0x000001f3dfa000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df8000-0x000001f3df9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df7000-0x000001f3df8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df6000-0x000001f3df7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df5000-0x000001f3df6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df4000-0x000001f3df5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df3000-0x000001f3df4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df2000-0x000001f3df3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df1000-0x000001f3df2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3df0000-0x000001f3df1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3def000-0x000001f3df0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dee000-0x000001f3def000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3dec000-0x000001f3ded000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3deb000-0x000001f3dec000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dea000-0x000001f3deb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de9000-0x000001f3dea000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de8000-0x000001f3de9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de7000-0x000001f3de8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de6000-0x000001f3de7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de5000-0x000001f3de6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de4000-0x000001f3de5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de3000-0x000001f3de4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de2000-0x000001f3de3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de1000-0x000001f3de2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3de0000-0x000001f3de1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ddf000-0x000001f3de0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dde000-0x000001f3ddf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ddd000-0x000001f3dde000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ddc000-0x000001f3ddd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ddb000-0x000001f3ddc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dda000-0x000001f3ddb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd9000-0x000001f3dda000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd8000-0x000001f3dd9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd7000-0x000001f3dd8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd6000-0x000001f3dd7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd5000-0x000001f3dd6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd4000-0x000001f3dd5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd3000-0x000001f3dd4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd2000-0x000001f3dd3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd1000-0x000001f3dd2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dd0000-0x000001f3dd1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dcf000-0x000001f3dd0000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3dcd000-0x000001f3dce000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dcc000-0x000001f3dcd000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3dc6000-0x000001f3dc7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dc5000-0x000001f3dc6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dc4000-0x000001f3dc5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dc3000-0x000001f3dc4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dc2000-0x000001f3dc3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3dc1000-0x000001f3dc2000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d9a000-0x000001f3d9b000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d98000-0x000001f3d99000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d97000-0x000001f3d98000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d96000-0x000001f3d97000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d95000-0x000001f3d96000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d94000-0x000001f3d95000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d93000-0x000001f3d94000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d92000-0x000001f3d93000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d91000-0x000001f3d92000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d90000-0x000001f3d91000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d8d000-0x000001f3d8e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d8c000-0x000001f3d8d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d8b000-0x000001f3d8c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d8a000-0x000001f3d8b000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d88000-0x000001f3d89000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d87000-0x000001f3d88000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d86000-0x000001f3d87000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d85000-0x000001f3d86000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d84000-0x000001f3d85000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d83000-0x000001f3d84000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d82000-0x000001f3d83000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d81000-0x000001f3d82000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d80000-0x000001f3d81000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d7e000-0x000001f3d7f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d7d000-0x000001f3d7e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d7c000-0x000001f3d7d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d7b000-0x000001f3d7c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d7a000-0x000001f3d7b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d79000-0x000001f3d7a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d78000-0x000001f3d79000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d77000-0x000001f3d78000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d76000-0x000001f3d77000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d75000-0x000001f3d76000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d74000-0x000001f3d75000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d73000-0x000001f3d74000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d72000-0x000001f3d73000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d71000-0x000001f3d72000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d70000-0x000001f3d71000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6f000-0x000001f3d70000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6e000-0x000001f3d6f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6d000-0x000001f3d6e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6c000-0x000001f3d6d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6b000-0x000001f3d6c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d6a000-0x000001f3d6b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d69000-0x000001f3d6a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d68000-0x000001f3d69000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d67000-0x000001f3d68000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d66000-0x000001f3d67000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d65000-0x000001f3d66000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d64000-0x000001f3d65000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d63000-0x000001f3d64000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d62000-0x000001f3d63000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d61000-0x000001f3d62000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d60000-0x000001f3d61000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5f000-0x000001f3d60000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5e000-0x000001f3d5f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5d000-0x000001f3d5e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5c000-0x000001f3d5d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5b000-0x000001f3d5c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d5a000-0x000001f3d5b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d59000-0x000001f3d5a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d58000-0x000001f3d59000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d57000-0x000001f3d58000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d56000-0x000001f3d57000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d55000-0x000001f3d56000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d54000-0x000001f3d55000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d53000-0x000001f3d54000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d52000-0x000001f3d53000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d51000-0x000001f3d52000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d50000-0x000001f3d51000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4f000-0x000001f3d50000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4e000-0x000001f3d4f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4d000-0x000001f3d4e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4c000-0x000001f3d4d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4b000-0x000001f3d4c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d4a000-0x000001f3d4b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d49000-0x000001f3d4a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d48000-0x000001f3d49000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d47000-0x000001f3d48000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d46000-0x000001f3d47000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d45000-0x000001f3d46000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d44000-0x000001f3d45000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d43000-0x000001f3d44000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d42000-0x000001f3d43000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d41000-0x000001f3d42000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d40000-0x000001f3d41000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3f000-0x000001f3d40000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3e000-0x000001f3d3f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3d000-0x000001f3d3e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3c000-0x000001f3d3d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3b000-0x000001f3d3c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d3a000-0x000001f3d3b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d39000-0x000001f3d3a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d38000-0x000001f3d39000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d37000-0x000001f3d38000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d36000-0x000001f3d37000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d35000-0x000001f3d36000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d34000-0x000001f3d35000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d33000-0x000001f3d34000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d32000-0x000001f3d33000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d31000-0x000001f3d32000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d30000-0x000001f3d31000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2f000-0x000001f3d30000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2e000-0x000001f3d2f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2d000-0x000001f3d2e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2c000-0x000001f3d2d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2b000-0x000001f3d2c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d2a000-0x000001f3d2b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d29000-0x000001f3d2a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d28000-0x000001f3d29000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d27000-0x000001f3d28000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d26000-0x000001f3d27000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d25000-0x000001f3d26000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d24000-0x000001f3d25000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d23000-0x000001f3d24000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d22000-0x000001f3d23000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d21000-0x000001f3d22000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d20000-0x000001f3d21000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d1e000-0x000001f3d1f000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d13000-0x000001f3d14000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3d12000-0x000001f3d13000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3d10000-0x000001f3d11000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cf5000-0x000001f3cf6000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cf3000-0x000001f3cf4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cf2000-0x000001f3cf3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cf1000-0x000001f3cf2000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cef000-0x000001f3cf0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cee000-0x000001f3cef000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cec000-0x000001f3ced000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3ce8000-0x000001f3ce9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce7000-0x000001f3ce8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce6000-0x000001f3ce7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce5000-0x000001f3ce6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce4000-0x000001f3ce5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce3000-0x000001f3ce4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce2000-0x000001f3ce3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce1000-0x000001f3ce2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ce0000-0x000001f3ce1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cdf000-0x000001f3ce0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cde000-0x000001f3cdf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cdd000-0x000001f3cde000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cdc000-0x000001f3cdd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cdb000-0x000001f3cdc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cda000-0x000001f3cdb000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cd7000-0x000001f3cd8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd6000-0x000001f3cd7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd5000-0x000001f3cd6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd4000-0x000001f3cd5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd3000-0x000001f3cd4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd2000-0x000001f3cd3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd1000-0x000001f3cd2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cd0000-0x000001f3cd1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ccf000-0x000001f3cd0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cce000-0x000001f3ccf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ccd000-0x000001f3cce000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ccc000-0x000001f3ccd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ccb000-0x000001f3ccc000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cc9000-0x000001f3cca000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3cc7000-0x000001f3cc8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc6000-0x000001f3cc7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc5000-0x000001f3cc6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc4000-0x000001f3cc5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc3000-0x000001f3cc4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc2000-0x000001f3cc3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc1000-0x000001f3cc2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cc0000-0x000001f3cc1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cbf000-0x000001f3cc0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cbe000-0x000001f3cbf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cbd000-0x000001f3cbe000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cbc000-0x000001f3cbd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cbb000-0x000001f3cbc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cba000-0x000001f3cbb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb9000-0x000001f3cba000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb8000-0x000001f3cb9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb7000-0x000001f3cb8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb6000-0x000001f3cb7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb5000-0x000001f3cb6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb4000-0x000001f3cb5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb3000-0x000001f3cb4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb2000-0x000001f3cb3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb1000-0x000001f3cb2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cb0000-0x000001f3cb1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3caf000-0x000001f3cb0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cae000-0x000001f3caf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cad000-0x000001f3cae000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cac000-0x000001f3cad000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3cab000-0x000001f3cac000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3caa000-0x000001f3cab000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca9000-0x000001f3caa000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca8000-0x000001f3ca9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca7000-0x000001f3ca8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca6000-0x000001f3ca7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca5000-0x000001f3ca6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca4000-0x000001f3ca5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca3000-0x000001f3ca4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca2000-0x000001f3ca3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca1000-0x000001f3ca2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3ca0000-0x000001f3ca1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9f000-0x000001f3ca0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9e000-0x000001f3c9f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9d000-0x000001f3c9e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9c000-0x000001f3c9d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9b000-0x000001f3c9c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c9a000-0x000001f3c9b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c99000-0x000001f3c9a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c98000-0x000001f3c99000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c97000-0x000001f3c98000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c96000-0x000001f3c97000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c95000-0x000001f3c96000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c94000-0x000001f3c95000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c93000-0x000001f3c94000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c92000-0x000001f3c93000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c91000-0x000001f3c92000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c90000-0x000001f3c91000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8f000-0x000001f3c90000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8e000-0x000001f3c8f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8d000-0x000001f3c8e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8c000-0x000001f3c8d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8b000-0x000001f3c8c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c8a000-0x000001f3c8b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c89000-0x000001f3c8a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c88000-0x000001f3c89000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c87000-0x000001f3c88000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c86000-0x000001f3c87000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c85000-0x000001f3c86000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c84000-0x000001f3c85000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c83000-0x000001f3c84000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c82000-0x000001f3c83000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c81000-0x000001f3c82000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c80000-0x000001f3c81000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7f000-0x000001f3c80000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7e000-0x000001f3c7f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7d000-0x000001f3c7e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7c000-0x000001f3c7d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7b000-0x000001f3c7c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c7a000-0x000001f3c7b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c79000-0x000001f3c7a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c78000-0x000001f3c79000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c77000-0x000001f3c78000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c76000-0x000001f3c77000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c75000-0x000001f3c76000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c74000-0x000001f3c75000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c73000-0x000001f3c74000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c72000-0x000001f3c73000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c71000-0x000001f3c72000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c70000-0x000001f3c71000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6f000-0x000001f3c70000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6e000-0x000001f3c6f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6d000-0x000001f3c6e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6c000-0x000001f3c6d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6b000-0x000001f3c6c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c6a000-0x000001f3c6b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c69000-0x000001f3c6a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c68000-0x000001f3c69000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c67000-0x000001f3c68000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c66000-0x000001f3c67000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c65000-0x000001f3c66000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c64000-0x000001f3c65000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c63000-0x000001f3c64000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c62000-0x000001f3c63000] alloc_low_pages+0x103/0x130
[    0.000000] init_memory_mapping: [mem 0x00100000-0x17fffffff]
[    0.000000]  [mem 0x00100000-0x17fffffff] page 4k
[    0.000000] memblock_reserve: [0x000001f3c61000-0x000001f3c62000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c60000-0x000001f3c61000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5f000-0x000001f3c60000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5e000-0x000001f3c5f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5d000-0x000001f3c5e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5c000-0x000001f3c5d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5b000-0x000001f3c5c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c5a000-0x000001f3c5b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c59000-0x000001f3c5a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c58000-0x000001f3c59000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c57000-0x000001f3c58000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c56000-0x000001f3c57000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c55000-0x000001f3c56000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c54000-0x000001f3c55000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c53000-0x000001f3c54000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c52000-0x000001f3c53000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c51000-0x000001f3c52000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c50000-0x000001f3c51000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4f000-0x000001f3c50000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4e000-0x000001f3c4f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4d000-0x000001f3c4e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4c000-0x000001f3c4d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4b000-0x000001f3c4c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c4a000-0x000001f3c4b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c49000-0x000001f3c4a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c48000-0x000001f3c49000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c47000-0x000001f3c48000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c46000-0x000001f3c47000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c45000-0x000001f3c46000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c44000-0x000001f3c45000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c43000-0x000001f3c44000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c42000-0x000001f3c43000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c41000-0x000001f3c42000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c40000-0x000001f3c41000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3f000-0x000001f3c40000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3e000-0x000001f3c3f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3d000-0x000001f3c3e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3c000-0x000001f3c3d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3b000-0x000001f3c3c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c3a000-0x000001f3c3b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c39000-0x000001f3c3a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c38000-0x000001f3c39000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c37000-0x000001f3c38000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c36000-0x000001f3c37000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c35000-0x000001f3c36000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c34000-0x000001f3c35000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c33000-0x000001f3c34000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c32000-0x000001f3c33000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c31000-0x000001f3c32000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c30000-0x000001f3c31000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2f000-0x000001f3c30000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2e000-0x000001f3c2f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2d000-0x000001f3c2e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2c000-0x000001f3c2d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2b000-0x000001f3c2c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c2a000-0x000001f3c2b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c29000-0x000001f3c2a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c28000-0x000001f3c29000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c27000-0x000001f3c28000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c26000-0x000001f3c27000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c25000-0x000001f3c26000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c24000-0x000001f3c25000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c23000-0x000001f3c24000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c22000-0x000001f3c23000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c21000-0x000001f3c22000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c20000-0x000001f3c21000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1f000-0x000001f3c20000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1e000-0x000001f3c1f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1d000-0x000001f3c1e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1c000-0x000001f3c1d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1b000-0x000001f3c1c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c1a000-0x000001f3c1b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c19000-0x000001f3c1a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c18000-0x000001f3c19000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c17000-0x000001f3c18000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c16000-0x000001f3c17000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c15000-0x000001f3c16000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c14000-0x000001f3c15000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c13000-0x000001f3c14000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c12000-0x000001f3c13000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c11000-0x000001f3c12000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c10000-0x000001f3c11000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0f000-0x000001f3c10000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0e000-0x000001f3c0f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0d000-0x000001f3c0e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0c000-0x000001f3c0d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0b000-0x000001f3c0c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c0a000-0x000001f3c0b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c09000-0x000001f3c0a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c08000-0x000001f3c09000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c07000-0x000001f3c08000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c06000-0x000001f3c07000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c05000-0x000001f3c06000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c04000-0x000001f3c05000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c03000-0x000001f3c04000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c02000-0x000001f3c03000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c01000-0x000001f3c02000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3c00000-0x000001f3c01000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bff000-0x000001f3c00000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bfe000-0x000001f3bff000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bfd000-0x000001f3bfe000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bfc000-0x000001f3bfd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bfb000-0x000001f3bfc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bfa000-0x000001f3bfb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf9000-0x000001f3bfa000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf8000-0x000001f3bf9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf7000-0x000001f3bf8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf6000-0x000001f3bf7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf5000-0x000001f3bf6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf4000-0x000001f3bf5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf3000-0x000001f3bf4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf2000-0x000001f3bf3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf1000-0x000001f3bf2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bf0000-0x000001f3bf1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bef000-0x000001f3bf0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bee000-0x000001f3bef000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bed000-0x000001f3bee000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bec000-0x000001f3bed000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3beb000-0x000001f3bec000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bea000-0x000001f3beb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be9000-0x000001f3bea000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be8000-0x000001f3be9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be7000-0x000001f3be8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be6000-0x000001f3be7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be5000-0x000001f3be6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be4000-0x000001f3be5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be3000-0x000001f3be4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be2000-0x000001f3be3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be1000-0x000001f3be2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3be0000-0x000001f3be1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bdf000-0x000001f3be0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bde000-0x000001f3bdf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bdd000-0x000001f3bde000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bdc000-0x000001f3bdd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bdb000-0x000001f3bdc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bda000-0x000001f3bdb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd9000-0x000001f3bda000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd8000-0x000001f3bd9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd7000-0x000001f3bd8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd6000-0x000001f3bd7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd5000-0x000001f3bd6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd4000-0x000001f3bd5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd3000-0x000001f3bd4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd2000-0x000001f3bd3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd1000-0x000001f3bd2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bd0000-0x000001f3bd1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bcf000-0x000001f3bd0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bce000-0x000001f3bcf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bcd000-0x000001f3bce000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bcc000-0x000001f3bcd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bcb000-0x000001f3bcc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bca000-0x000001f3bcb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc9000-0x000001f3bca000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc8000-0x000001f3bc9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc7000-0x000001f3bc8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc6000-0x000001f3bc7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc5000-0x000001f3bc6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc4000-0x000001f3bc5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc3000-0x000001f3bc4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc2000-0x000001f3bc3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc1000-0x000001f3bc2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3bc0000-0x000001f3bc1000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b42000-0x000001f3b43000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b40000-0x000001f3b41000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b35000-0x000001f3b36000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b33000-0x000001f3b34000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b32000-0x000001f3b33000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b31000-0x000001f3b32000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b30000-0x000001f3b31000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b2f000-0x000001f3b30000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b2e000-0x000001f3b2f000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b28000-0x000001f3b29000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b26000-0x000001f3b27000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b25000-0x000001f3b26000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b24000-0x000001f3b25000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b23000-0x000001f3b24000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b22000-0x000001f3b23000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b21000-0x000001f3b22000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b20000-0x000001f3b21000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b1f000-0x000001f3b20000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b1d000-0x000001f3b1e000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b1a000-0x000001f3b1b000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f3b18000-0x000001f3b19000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b17000-0x000001f3b18000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b16000-0x000001f3b17000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b15000-0x000001f3b16000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3b14000-0x000001f3b15000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f39c2000-0x000001f39c3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f39c1000-0x000001f39c2000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f39bb000-0x000001f39bc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f39ba000-0x000001f39bb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f39b9000-0x000001f39ba000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f39b5000-0x000001f39b6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f39b4000-0x000001f39b5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f39b3000-0x000001f39b4000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32d1000-0x000001f32d2000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32c1000-0x000001f32c2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32c0000-0x000001f32c1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32bf000-0x000001f32c0000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32bd000-0x000001f32be000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32bc000-0x000001f32bd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32bb000-0x000001f32bc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32ba000-0x000001f32bb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32b9000-0x000001f32ba000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32b5000-0x000001f32b6000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32b2000-0x000001f32b3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32b1000-0x000001f32b2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32b0000-0x000001f32b1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32af000-0x000001f32b0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32ae000-0x000001f32af000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32ad000-0x000001f32ae000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32ac000-0x000001f32ad000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32ab000-0x000001f32ac000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32aa000-0x000001f32ab000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a9000-0x000001f32aa000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32a7000-0x000001f32a8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a6000-0x000001f32a7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a5000-0x000001f32a6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a4000-0x000001f32a5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a3000-0x000001f32a4000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f32a1000-0x000001f32a2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f32a0000-0x000001f32a1000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f329c000-0x000001f329d000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f329a000-0x000001f329b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3299000-0x000001f329a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3298000-0x000001f3299000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3297000-0x000001f3298000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3296000-0x000001f3297000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3295000-0x000001f3296000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3294000-0x000001f3295000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3293000-0x000001f3294000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3292000-0x000001f3293000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3291000-0x000001f3292000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f328f000-0x000001f3290000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f328d000-0x000001f328e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f328c000-0x000001f328d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f328b000-0x000001f328c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f328a000-0x000001f328b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3289000-0x000001f328a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3288000-0x000001f3289000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3287000-0x000001f3288000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3286000-0x000001f3287000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3285000-0x000001f3286000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3284000-0x000001f3285000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f31e2000-0x000001f31e3000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f31df000-0x000001f31e0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31de000-0x000001f31df000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f31dc000-0x000001f31dd000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f31d9000-0x000001f31da000] alloc_low_pages+0x103/0x130
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[    0.000000] memblock_reserve: [0x000001f31d5000-0x000001f31d6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31d4000-0x000001f31d5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31d3000-0x000001f31d4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31d2000-0x000001f31d3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31d1000-0x000001f31d2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31d0000-0x000001f31d1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31cf000-0x000001f31d0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ce000-0x000001f31cf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31cd000-0x000001f31ce000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31cc000-0x000001f31cd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31cb000-0x000001f31cc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ca000-0x000001f31cb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c9000-0x000001f31ca000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c8000-0x000001f31c9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c7000-0x000001f31c8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c6000-0x000001f31c7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c5000-0x000001f31c6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c4000-0x000001f31c5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c3000-0x000001f31c4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c2000-0x000001f31c3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c1000-0x000001f31c2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31c0000-0x000001f31c1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31bf000-0x000001f31c0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31be000-0x000001f31bf000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31bd000-0x000001f31be000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31bc000-0x000001f31bd000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31bb000-0x000001f31bc000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ba000-0x000001f31bb000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b9000-0x000001f31ba000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b8000-0x000001f31b9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b7000-0x000001f31b8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b6000-0x000001f31b7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b5000-0x000001f31b6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b4000-0x000001f31b5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b3000-0x000001f31b4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b2000-0x000001f31b3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b1000-0x000001f31b2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31b0000-0x000001f31b1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31af000-0x000001f31b0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ae000-0x000001f31af000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ad000-0x000001f31ae000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ac000-0x000001f31ad000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31ab000-0x000001f31ac000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31aa000-0x000001f31ab000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a9000-0x000001f31aa000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a8000-0x000001f31a9000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a7000-0x000001f31a8000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a6000-0x000001f31a7000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a5000-0x000001f31a6000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a4000-0x000001f31a5000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a3000-0x000001f31a4000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a2000-0x000001f31a3000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a1000-0x000001f31a2000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f31a0000-0x000001f31a1000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319f000-0x000001f31a0000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319e000-0x000001f319f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319d000-0x000001f319e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319c000-0x000001f319d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319b000-0x000001f319c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f319a000-0x000001f319b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3199000-0x000001f319a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3198000-0x000001f3199000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3197000-0x000001f3198000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3196000-0x000001f3197000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3195000-0x000001f3196000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3194000-0x000001f3195000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3193000-0x000001f3194000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3192000-0x000001f3193000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3191000-0x000001f3192000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3190000-0x000001f3191000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318f000-0x000001f3190000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318e000-0x000001f318f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318d000-0x000001f318e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318c000-0x000001f318d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318b000-0x000001f318c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f318a000-0x000001f318b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3189000-0x000001f318a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3188000-0x000001f3189000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3187000-0x000001f3188000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3186000-0x000001f3187000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3185000-0x000001f3186000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3184000-0x000001f3185000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3183000-0x000001f3184000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3182000-0x000001f3183000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3181000-0x000001f3182000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3180000-0x000001f3181000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317f000-0x000001f3180000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317e000-0x000001f317f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317d000-0x000001f317e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317c000-0x000001f317d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317b000-0x000001f317c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f317a000-0x000001f317b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3179000-0x000001f317a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3178000-0x000001f3179000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3177000-0x000001f3178000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3176000-0x000001f3177000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3175000-0x000001f3176000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3174000-0x000001f3175000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3173000-0x000001f3174000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3172000-0x000001f3173000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3171000-0x000001f3172000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3170000-0x000001f3171000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316f000-0x000001f3170000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316e000-0x000001f316f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316d000-0x000001f316e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316c000-0x000001f316d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316b000-0x000001f316c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f316a000-0x000001f316b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3169000-0x000001f316a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3168000-0x000001f3169000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3167000-0x000001f3168000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3166000-0x000001f3167000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3165000-0x000001f3166000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3164000-0x000001f3165000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3163000-0x000001f3164000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3162000-0x000001f3163000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3161000-0x000001f3162000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3160000-0x000001f3161000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315f000-0x000001f3160000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315e000-0x000001f315f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315d000-0x000001f315e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315c000-0x000001f315d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315b000-0x000001f315c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f315a000-0x000001f315b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3159000-0x000001f315a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3158000-0x000001f3159000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3157000-0x000001f3158000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3156000-0x000001f3157000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3155000-0x000001f3156000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3154000-0x000001f3155000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3153000-0x000001f3154000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3152000-0x000001f3153000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3151000-0x000001f3152000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3150000-0x000001f3151000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314f000-0x000001f3150000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314e000-0x000001f314f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314d000-0x000001f314e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314c000-0x000001f314d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314b000-0x000001f314c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f314a000-0x000001f314b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3149000-0x000001f314a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3148000-0x000001f3149000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3147000-0x000001f3148000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3146000-0x000001f3147000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3145000-0x000001f3146000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3144000-0x000001f3145000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3143000-0x000001f3144000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3142000-0x000001f3143000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3141000-0x000001f3142000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3140000-0x000001f3141000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313f000-0x000001f3140000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313e000-0x000001f313f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313d000-0x000001f313e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313c000-0x000001f313d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313b000-0x000001f313c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f313a000-0x000001f313b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3139000-0x000001f313a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3138000-0x000001f3139000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3137000-0x000001f3138000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3136000-0x000001f3137000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3135000-0x000001f3136000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3134000-0x000001f3135000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3133000-0x000001f3134000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3132000-0x000001f3133000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3131000-0x000001f3132000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3130000-0x000001f3131000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312f000-0x000001f3130000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312e000-0x000001f312f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312d000-0x000001f312e000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312c000-0x000001f312d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312b000-0x000001f312c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f312a000-0x000001f312b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3129000-0x000001f312a000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3128000-0x000001f3129000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3127000-0x000001f3128000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3126000-0x000001f3127000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3125000-0x000001f3126000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3124000-0x000001f3125000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3123000-0x000001f3124000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3122000-0x000001f3123000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3121000-0x000001f3122000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3120000-0x000001f3121000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311f000-0x000001f3120000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311e000-0x000001f311f000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311d000-0x000001f311e000] alloc_low_pages+0x103/0x130
[    0.000000] init_memory_mapping: [mem 0x1f4000000-0x1f47fffff]
[    0.000000]  [mem 0x1f4000000-0x1f47fffff] page 4k
[    0.000000] memblock_reserve: [0x000001f311c000-0x000001f311d000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311b000-0x000001f311c000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f311a000-0x000001f311b000] alloc_low_pages+0x103/0x130
[    0.000000] memblock_reserve: [0x000001f3119000-0x000001f311a000] alloc_low_pages+0x103/0x130
[    0.000000] Kernel panic - not syncing: initrd too large to handle, disabling initrd (348401664 needed, 524288 available)
[    0.000000] 
[    0.000000] Pid: 0, comm: swapper Not tainted 3.7.0-rc4upstream-00042-g1b66ccf #1
[    0.000000] Call Trace:
[    0.000000]  [<ffffffff81633a5c>] panic+0xbf/0x1df
[    0.000000]  [<ffffffff81ac00e1>] setup_arch+0x728/0xb29
[    0.000000]  [<ffffffff81633c48>] ? printk+0x48/0x4a
[    0.000000]  [<ffffffff81aba897>] start_kernel+0x90/0x39e
[    0.000000]  [<ffffffff81aba356>] x86_64_start_reservations+0x131/0x136
[    0.000000]  [<ffffffff81abca38>] xen_start_kernel+0x546/0x548

xen memmap

[    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[    0.000000] Xen: [mem 0x0000000000100000-0x00000001f47fffff] usable

there is no hole under 4G, trigger the bug about max_low_pfn_mapped updating in add_pfn_range_mapped().

please check attached patch, that should fix the problem.

then I will fold it into corresponding commit that instroduce add_pfn_range_mapped().

Thanks

Yinghai

---
 arch/x86/mm/init.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

Index: linux-2.6/arch/x86/mm/init.c
===================================================================
@@ -305,8 +305,9 @@ static void add_pfn_range_mapped(unsigne
 
 	max_pfn_mapped = max(max_pfn_mapped, end_pfn);
 
-	if (end_pfn <= (1UL << (32 - PAGE_SHIFT)))
-		max_low_pfn_mapped = max(max_low_pfn_mapped, end_pfn);
+	if (start_pfn < (1UL<<(32-PAGE_SHIFT)))
+		max_low_pfn_mapped = max(max_low_pfn_mapped,
+					 min(end_pfn, 1UL<<(32-PAGE_SHIFT)));
 }
 
 bool pfn_range_is_mapped(unsigned long start_pfn, unsigned long end_pfn)

If you did not try the patch yet, please get for-x86-mm again. I folded that patch into that commit about add_pfn_range_mapped.

Yinghai,

I've tested it the patches with the modifications and they were working.

Can you repost them once more so that I can review the last time and provide the proper acks, etc.

rebase patchset together tip/x86/mm2 on top of linus v3.7-rc4

so this one include patchset : x86, mm: init_memory_mapping cleanup in tip/x86/mm2
---
Current kernel init memory mapping between [0, TOML) and [4G, TOMH) Some AMD systems have mem hole between 4G and TOMH, around 1T. According to HPA, we should only mapping ram range.
1. Seperate calculate_table_space_size and find_early_page_table out with init_memory_mapping.
2. For all ranges, will allocate page table one time
3. init mapping for ram range one by one.
---

pre mapping page table patcheset includes:
1. use brk to mapping first PMD_SIZE range under end of ram.
2. top down to initialize page table range by range.
3. get rid of calculate_page_table, and find_early_page_table.
4. remove early_ioremap in page table accessing.
5. remove workaround in xen to mark page RO.

v2: changes, update xen interface about pagetable_reserve, so not
use pgt_buf_* in xen code directly.
v3: use range top-down to initialize page table, so will not use
calculating/find early table anymore.
also reorder the patches sequence.
v4: add mapping_mark_page_ro to fix xen, also move pgt_buf_* to init.c
and merge alloc_low_page(), and for 32bit need to add alloc_low_pages to fix 32bit kmap setting.
v5: remove mark_page_ro workaround and add another 5 cleanup patches.
v6: rebase on v3.7-rc4 and add 4 cleanup patches.
v7: fix max_low_pfn_mapped for xen domu memmap that does not have hole under 4g
add pfn_range_is_mapped() calling for left over.

could be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/yinghai/linux-yinghai.git for-x86-mm

4d02fa2: x86, mm: Let "memmap=" take more entries one time
69c9485: mm: Kill NO_BOOTMEM version free_all_bootmem_node()
27a6151: sparc, mm: Remove calling of free_all_bootmem_node()
60d9772: x86, mm: kill numa_64.h
37c4eb8: x86, mm: kill numa_free_all_bootmem()
96e6c74: x86, mm: Use clamp_t() in init_range_memory_mapping
714535a: x86, mm: Move after_bootmem to mm_internel.h
5b10dbc: x86, mm: Unifying after_bootmem for 32bit and 64bit
84c1df0: x86, mm: use limit_pfn for end pfn
1108331: x86, mm: use pfn instead of pos in split_mem_range
7c1bf23: x86, mm: use PFN_DOWN in split_mem_range()
3ba0781: x86, mm: use round_up/down in split_mem_range()
34fb23f: x86, mm: Add check before clear pte above max_low_pfn on 32bit
df4a7d9: x86, mm: Move function declaration into mm_internal.h
c9b0822: x86, mm: change low/hignmem_pfn_init to static on 32bit
0467f80: x86, mm: Move init_gbpages() out of setup.c
28170b7: x86, mm: Move back pgt_buf_* to mm/init.c
b678b7c: x86, mm: only call early_ioremap_page_table_range_init() once
c31ef78: x86, mm: Add pointer about Xen mmu requirement for alloc_low_pages
ef4d350: x86, mm: Add alloc_low_pages(num)
ceaa6ce: x86, mm, Xen: Remove mapping_pagetable_reserve()
8782e42: x86, mm: Move min_pfn_mapped back to mm/init.c
fd3fb05: x86, mm: Merge alloc_low_page between 64bit and 32bit
2c0d92c: x86, mm: Remove parameter in alloc_low_page for 64bit
2a0c505: x86, mm: Remove early_memremap workaround for page table accessing on 64bit
e14b94f: x86, mm: setup page table in top-down
6db7bfb: x86, mm: Break down init_all_memory_mapping
2f799be: x86, mm: Don't clear page table if range is ram
686f1c4: x86, mm: Use big page size for small memory range
a473cf6: x86, mm: Align start address to correct big page size
114b025: x86, mm: relocate initrd under all mem for 64bit
bb3c507: x86, mm: Only direct map addresses that are marked as E820_RAM 7d59f08: x86, mm: use pfn_range_is_mapped() with reserve_initrd
2d2a11e: x86, mm: use pfn_range_is_mapped() with gart
e108072: x86, mm: use pfn_range_is_mapped() with CPA
4894260: x86, mm: Fixup code testing if a pfn is direct mapped
b0771c3: x86, mm: if kernel .text .data .bss are not marked as E820_RAM, complain and fix 3159e6b: x86, mm: Set memblock initial limit to 1M
593cf88: x86, mm: Separate out calculate_table_space_size()
fba94e2: x86, mm: Find early page table buffer together
e1585d2: x86, mm: Change find_early_table_space() paramters
6a93a89: x86, mm: Revert back good_end setting for 64bit
306c44a: x86, mm: Move init_memory_mapping calling out of setup.c
fb40d13: x86, mm: Move down find_early_table_space()
e748645: x86, mm: Split out split_mem_range from init_memory_mapping
e419542: x86, mm: Add global page_size_mask and probe one time only

 arch/sparc/mm/init_64.c              |   24 +-
 arch/x86/include/asm/init.h          |   21 +--
 arch/x86/include/asm/numa.h          |    2 -
 arch/x86/include/asm/numa_64.h       |    6 -
 arch/x86/include/asm/page_types.h    |    2 +
 arch/x86/include/asm/pgtable.h       |    2 +
 arch/x86/include/asm/pgtable_types.h |    1 -
 arch/x86/include/asm/x86_init.h      |   12 -
 arch/x86/kernel/acpi/boot.c          |    1 -
 arch/x86/kernel/amd_gart_64.c        |    5 +-
 arch/x86/kernel/cpu/amd.c            |    9 +-
 arch/x86/kernel/cpu/intel.c          |    1 -
 arch/x86/kernel/e820.c               |   16 ++-
 arch/x86/kernel/setup.c              |  121 ++++------
 arch/x86/kernel/x86_init.c           |    4 -
 arch/x86/mm/init.c                   |  446 ++++++++++++++++++++++------------
 arch/x86/mm/init_32.c                |  106 +++++---
 arch/x86/mm/init_64.c                |  140 ++++-------
 arch/x86/mm/mm_internal.h            |   19 ++
 arch/x86/mm/numa_64.c                |   13 -
 arch/x86/mm/pageattr.c               |   16 +-
 arch/x86/platform/efi/efi.c          |    7 +-
 arch/x86/xen/mmu.c                   |   28 ---
 include/linux/mm.h                   |    1 -
 mm/nobootmem.c                       |   14 -
 25 files changed, 513 insertions(+), 504 deletions(-)
 delete mode 100644 arch/x86/include/asm/numa_64.h
 create mode 100644 arch/x86/mm/mm_internal.h

1.7.7

Now we pass around use_gbpages and use_pse for calculating page table size, Later we will need to call init_memory_mapping for every ram range one by one, that mean those calculation will be done several times.

Those information are the same for all ram range and could be stored in page_size_mask and could be probed it one time only.

Move that probing code out of init_memory_mapping into separated function probe_page_size_mask(), and call it before all init_memory_mapping.

---
 arch/x86/include/asm/pgtable.h |    1 +
 arch/x86/kernel/setup.c        |    1 +
 arch/x86/mm/init.c             |   55 ++++++++++++++++++---------------------
 3 files changed, 27 insertions(+), 30 deletions(-)

index a1f780d..98ac76d 100644
@@ -602,6 +602,7 @@ static inline int pgd_none(pgd_t pgd)
 #ifndef __ASSEMBLY__
 
 extern int direct_gbpages;
+void probe_page_size_mask(void);
 
 /* local pte updates need not use xchg for locking */
 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)

index ca45696..01fb5f9 100644
@@ -913,6 +913,7 @@ void __init setup_arch(char **cmdline_p)
 	setup_real_mode();
 
 	init_gbpages();
+	probe_page_size_mask();
 
 	/* max_pfn_mapped is updated here */
 	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);

1.7.7

So make init_memory_mapping smaller and readable.

---
 arch/x86/mm/init.c |   42 ++++++++++++++++++++++++++----------------
 1 files changed, 26 insertions(+), 16 deletions(-)

index aa5b0da..6d8e102 100644
@@ -146,25 +146,13 @@ static int __meminit save_mr(struct map_range *mr, int nr_range,
 	return nr_range;
 }
 
-/*
- * Setup the direct mapping of the physical memory at PAGE_OFFSET.
- * This runs before bootmem is initialized and gets pages directly from
- * the physical memory. To access them they are temporarily mapped.
- */
-unsigned long __init_refok init_memory_mapping(unsigned long start,
-					       unsigned long end)
+static int __meminit split_mem_range(struct map_range *mr, int nr_range,
+				     unsigned long start,
+				     unsigned long end)
 {
 	unsigned long start_pfn, end_pfn;
-	unsigned long ret = 0;
 	unsigned long pos;
-	struct map_range mr[NR_RANGE_MR];
-	int nr_range, i;
-
-	printk(KERN_INFO "init_memory_mapping: [mem %#010lx-%#010lx]\n",
-	       start, end - 1);
-
-	memset(mr, 0, sizeof(mr));
-	nr_range = 0;
+	int i;
 
 	/* head if not big page alignment ? */
 	start_pfn = start >> PAGE_SHIFT;

@@ -258,6 +246,28 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 			(mr[i].page_size_mask & (1<<PG_LEVEL_1G))?"1G":(
 			 (mr[i].page_size_mask & (1<<PG_LEVEL_2M))?"2M":"4k"));
 
+	return nr_range;
+}
+
+/*
+ * Setup the direct mapping of the physical memory at PAGE_OFFSET.
+ * This runs before bootmem is initialized and gets pages directly from
+ * the physical memory. To access them they are temporarily mapped.
+ */
+unsigned long __init_refok init_memory_mapping(unsigned long start,
+					       unsigned long end)
+{
+	struct map_range mr[NR_RANGE_MR];
+	unsigned long ret = 0;
+	int nr_range, i;
+
+	pr_info("init_memory_mapping: [mem %#010lx-%#010lx]\n",
+	       start, end - 1);
+
+	memset(mr, 0, sizeof(mr));
+	nr_range = 0;
+	nr_range = split_mem_range(mr, nr_range, start, end);
+
 	/*
 	 * Find space for the kernel direct mapping tables.
 	 *

1.7.7

                                                             ^^^^^^^^

Why not use 0 directly?

nr_range = split_mem_range(mr, 0, start, end);

yes, even could remove nr_range from split_mem_range.

but originally try to like "really" chopping the code to two parts.

It will need to call split_mem_range(). Move it down after that to avoid extra declaration.

---
 arch/x86/mm/init.c |  117 ++++++++++++++++++++++++++--------------------------
 1 files changed, 59 insertions(+), 58 deletions(-)

index 6d8e102..4a372d7 100644
@@ -36,64 +36,6 @@ struct map_range {
 };
 
 static int page_size_mask;
-/*
- * First calculate space needed for kernel direct mapping page tables to cover
- * mr[0].start to mr[nr_range - 1].end, while accounting for possible 2M and 1GB
- * pages. Then find enough contiguous space for those page tables.
- */
-static void __init find_early_table_space(struct map_range *mr, int nr_range)
-{
-	int i;
-	unsigned long puds = 0, pmds = 0, ptes = 0, tables;
-	unsigned long start = 0, good_end;
-	phys_addr_t base;
-
-	for (i = 0; i < nr_range; i++) {
-		unsigned long range, extra;
-
-		range = mr[i].end - mr[i].start;
-		puds += (range + PUD_SIZE - 1) >> PUD_SHIFT;
-
-		if (mr[i].page_size_mask & (1 << PG_LEVEL_1G)) {
-			extra = range - ((range >> PUD_SHIFT) << PUD_SHIFT);
-			pmds += (extra + PMD_SIZE - 1) >> PMD_SHIFT;
-		} else {
-			pmds += (range + PMD_SIZE - 1) >> PMD_SHIFT;
-		}
-
-		if (mr[i].page_size_mask & (1 << PG_LEVEL_2M)) {
-			extra = range - ((range >> PMD_SHIFT) << PMD_SHIFT);
-#ifdef CONFIG_X86_32
-			extra += PMD_SIZE;
-#endif
-			ptes += (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
-		} else {
-			ptes += (range + PAGE_SIZE - 1) >> PAGE_SHIFT;
-		}
-	}
-
-	tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
-	tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
-	tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
-
-#ifdef CONFIG_X86_32
-	/* for fixmap */
-	tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
-#endif
-	good_end = max_pfn_mapped << PAGE_SHIFT;
-
-	base = memblock_find_in_range(start, good_end, tables, PAGE_SIZE);
-	if (!base)
-		panic("Cannot find space for the kernel page tables");
-
-	pgt_buf_start = base >> PAGE_SHIFT;
-	pgt_buf_end = pgt_buf_start;
-	pgt_buf_top = pgt_buf_start + (tables >> PAGE_SHIFT);
-
-	printk(KERN_DEBUG "kernel direct mapping tables up to %#lx @ [mem %#010lx-%#010lx]\n",
-		mr[nr_range - 1].end - 1, pgt_buf_start << PAGE_SHIFT,
-		(pgt_buf_top << PAGE_SHIFT) - 1);
-}
 
 void probe_page_size_mask(void)
 {

@@ -250,6 +192,65 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
 }
 
 /*
+ * First calculate space needed for kernel direct mapping page tables to cover
+ * mr[0].start to mr[nr_range - 1].end, while accounting for possible 2M and 1GB
+ * pages. Then find enough contiguous space for those page tables.
+ */
+static void __init find_early_table_space(struct map_range *mr, int nr_range)
+{
+	int i;
+	unsigned long puds = 0, pmds = 0, ptes = 0, tables;
+	unsigned long start = 0, good_end;
+	phys_addr_t base;
+
+	for (i = 0; i < nr_range; i++) {
+		unsigned long range, extra;
+
+		range = mr[i].end - mr[i].start;
+		puds += (range + PUD_SIZE - 1) >> PUD_SHIFT;
+
+		if (mr[i].page_size_mask & (1 << PG_LEVEL_1G)) {
+			extra = range - ((range >> PUD_SHIFT) << PUD_SHIFT);
+			pmds += (extra + PMD_SIZE - 1) >> PMD_SHIFT;
+		} else {
+			pmds += (range + PMD_SIZE - 1) >> PMD_SHIFT;
+		}
+
+		if (mr[i].page_size_mask & (1 << PG_LEVEL_2M)) {
+			extra = range - ((range >> PMD_SHIFT) << PMD_SHIFT);
+#ifdef CONFIG_X86_32
+			extra += PMD_SIZE;
+#endif
+			ptes += (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
+		} else {
+			ptes += (range + PAGE_SIZE - 1) >> PAGE_SHIFT;
+		}
+	}
+
+	tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
+	tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
+	tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
+
+#ifdef CONFIG_X86_32
+	/* for fixmap */
+	tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
+#endif
+	good_end = max_pfn_mapped << PAGE_SHIFT;
+
+	base = memblock_find_in_range(start, good_end, tables, PAGE_SIZE);
+	if (!base)
+		panic("Cannot find space for the kernel page tables");
+
+	pgt_buf_start = base >> PAGE_SHIFT;
+	pgt_buf_end = pgt_buf_start;
+	pgt_buf_top = pgt_buf_start + (tables >> PAGE_SHIFT);
+
+	printk(KERN_DEBUG "kernel direct mapping tables up to %#lx @ [mem %#010lx-%#010lx]\n",
+		mr[nr_range - 1].end - 1, pgt_buf_start << PAGE_SHIFT,
+		(pgt_buf_top << PAGE_SHIFT) - 1);
+}
+
+/*
  * Setup the direct mapping of the physical memory at PAGE_OFFSET.
  * This runs before bootmem is initialized and gets pages directly from
  * the physical memory. To access them they are temporarily mapped.

1.7.7

Now init_memory_mapping is called two times, later will be called for every ram ranges.

Could put all related init_mem calling together and out of setup.c.

Actually, it reverts commit 1bbbbe7
x86: Exclude E820_RESERVED regions and memory holes above 4 GB from direct mapping.
will address that later with complete solution include handling hole under 4g.

---
 arch/x86/include/asm/init.h    |    1 -
 arch/x86/include/asm/pgtable.h |    2 +-
 arch/x86/kernel/setup.c        |   27 +--------------------------
 arch/x86/mm/init.c             |   19 ++++++++++++++++++-
 4 files changed, 20 insertions(+), 29 deletions(-)

index adcc0ae..4f13998 100644
@@ -12,7 +12,6 @@ kernel_physical_mapping_init(unsigned long start,
 			     unsigned long end,
 			     unsigned long page_size_mask);
 
-
 extern unsigned long __initdata pgt_buf_start;
 extern unsigned long __meminitdata pgt_buf_end;
 extern unsigned long __meminitdata pgt_buf_top;

index 98ac76d..dd1a888 100644
@@ -602,7 +602,7 @@ static inline int pgd_none(pgd_t pgd)
 #ifndef __ASSEMBLY__
 
 extern int direct_gbpages;
-void probe_page_size_mask(void);
+void init_mem_mapping(void);
 
 /* local pte updates need not use xchg for locking */
 static inline pte_t native_local_ptep_get_and_clear(pte_t *ptep)

index 01fb5f9..23b079f 100644
@@ -913,34 +913,9 @@ void __init setup_arch(char **cmdline_p)
 	setup_real_mode();
 
 	init_gbpages();
-	probe_page_size_mask();
 
-	/* max_pfn_mapped is updated here */
-	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
-	max_pfn_mapped = max_low_pfn_mapped;
+	init_mem_mapping();
 
-#ifdef CONFIG_X86_64
-	if (max_pfn > max_low_pfn) {
-		int i;
-		unsigned long start, end;
-		unsigned long start_pfn, end_pfn;
-
-		for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn,
-							 NULL) {
-
-			end = PFN_PHYS(end_pfn);
-			if (end <= (1UL<<32))
-				continue;
-
-			start = PFN_PHYS(start_pfn);
-			max_pfn_mapped = init_memory_mapping(
-						max((1UL<<32), start), end);
-		}
-
-		/* can we preseve max_low_pfn ?*/
-		max_low_pfn = max_pfn;
-	}
-#endif
 	memblock.current_limit = get_max_mapped();
 	dma_contiguous_reserve(0);
 

index 4a372d7..8927276 100644
@@ -37,7 +37,7 @@ struct map_range {
 
 static int page_size_mask;
 
-void probe_page_size_mask(void)
+static void __init probe_page_size_mask(void)
 {
 #if !defined(CONFIG_DEBUG_PAGEALLOC) && !defined(CONFIG_KMEMCHECK)
 	/*

@@ -316,6 +316,23 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	return ret >> PAGE_SHIFT;
 }
 
+void __init init_mem_mapping(void)
+{
+	probe_page_size_mask();
+
+	/* max_pfn_mapped is updated here */
+	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
+	max_pfn_mapped = max_low_pfn_mapped;
+
+#ifdef CONFIG_X86_64
+	if (max_pfn > max_low_pfn) {
+		max_pfn_mapped = init_memory_mapping(1UL<<32,
+						     max_pfn<<PAGE_SHIFT);
+		/* can we preseve max_low_pfn ?*/
+		max_low_pfn = max_pfn;
+	}
+#endif
+}
 
 /*
  * devmem_is_allowed() checks to see if /dev/mem access to a certain address

1.7.7

After

| commit 8548c84da2f47e71bbbe300f55edb768492575f7
| Author: Takashi Iwai <[email protected]>
| Date:   Sun Oct 23 23:19:12 2011 +0200
|
|    x86: Fix S4 regression
|
|    Commit 4b239f458 ("x86-64, mm: Put early page table high") causes a S4
|    regression since 2.6.39, namely the machine reboots occasionally at S4
|    resume.  It doesn't happen always, overall rate is about 1/20.  But,
|    like other bugs, once when this happens, it continues to happen.
|
|    This patch fixes the problem by essentially reverting the memory
|    assignment in the older way.

Have some page table around 512M again, that will prevent kdump to find 512M under 768M.

We need revert that reverting, so we could put page table high again for 64bit.

Takashi agreed that S4 regression could be something else.

	https://lkml.org/lkml/2012/6/15/182

---
 arch/x86/mm/init.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

index 8927276..8f57b12 100644
@@ -234,8 +234,8 @@ static void __init find_early_table_space(struct map_range *mr, int nr_range)
 #ifdef CONFIG_X86_32
 	/* for fixmap */
 	tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
-#endif
 	good_end = max_pfn_mapped << PAGE_SHIFT;
+#endif
 
 	base = memblock_find_in_range(start, good_end, tables, PAGE_SIZE);
 	if (!base)

1.7.7

call split_mem_range inside the function.

---
 arch/x86/mm/init.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

index 8f57b12..00089bf 100644
@@ -196,12 +196,18 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
  * mr[0].start to mr[nr_range - 1].end, while accounting for possible 2M and 1GB
  * pages. Then find enough contiguous space for those page tables.
  */
-static void __init find_early_table_space(struct map_range *mr, int nr_range)
+static void __init find_early_table_space(unsigned long start, unsigned long end)
 {
 	int i;
 	unsigned long puds = 0, pmds = 0, ptes = 0, tables;
-	unsigned long start = 0, good_end;
+	unsigned long good_end;
 	phys_addr_t base;
+	struct map_range mr[NR_RANGE_MR];
+	int nr_range;
+
+	memset(mr, 0, sizeof(mr));
+	nr_range = 0;
+	nr_range = split_mem_range(mr, nr_range, start, end);
 
 	for (i = 0; i < nr_range; i++) {
 		unsigned long range, extra;

@@ -277,7 +283,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	 * nodes are discovered.
 	 */
 	if (!after_bootmem)
-		find_early_table_space(mr, nr_range);
+		find_early_table_space(start, end);
 
 	for (i = 0; i < nr_range; i++)
 		ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,

1.7.7

We should not do that in every calling of init_memory_mapping.

At the same time need to move down early_memtest, and could remove after_bootmem checking.

-v2: fix one early_memtest with 32bit by passing max_pfn_mapped instead.

---
 arch/x86/mm/init.c |   66 ++++++++++++++++++++++++++-------------------------
 1 files changed, 34 insertions(+), 32 deletions(-)

index 00089bf..c273edb 100644
@@ -275,16 +275,6 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	nr_range = 0;
 	nr_range = split_mem_range(mr, nr_range, start, end);
 
-	/*
-	 * Find space for the kernel direct mapping tables.
-	 *
-	 * Later we should allocate these tables in the local node of the
-	 * memory mapped. Unfortunately this is done currently before the
-	 * nodes are discovered.
-	 */
-	if (!after_bootmem)
-		find_early_table_space(start, end);
-
 	for (i = 0; i < nr_range; i++)
 		ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,
 						   mr[i].page_size_mask);

@@ -297,6 +287,36 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 
 	__flush_tlb_all();
 
+	return ret >> PAGE_SHIFT;
+}
+
+void __init init_mem_mapping(void)
+{
+	probe_page_size_mask();
+
+	/*
+	 * Find space for the kernel direct mapping tables.
+	 *
+	 * Later we should allocate these tables in the local node of the
+	 * memory mapped. Unfortunately this is done currently before the
+	 * nodes are discovered.
+	 */
+#ifdef CONFIG_X86_64
+	find_early_table_space(0, max_pfn<<PAGE_SHIFT);
+#else
+	find_early_table_space(0, max_low_pfn<<PAGE_SHIFT);
+#endif
+	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
+	max_pfn_mapped = max_low_pfn_mapped;
+
+#ifdef CONFIG_X86_64
+	if (max_pfn > max_low_pfn) {
+		max_pfn_mapped = init_memory_mapping(1UL<<32,
+						     max_pfn<<PAGE_SHIFT);
+		/* can we preseve max_low_pfn ?*/
+		max_low_pfn = max_pfn;
+	}
+#endif
 	/*
 	 * Reserve the kernel pagetable pages we used (pgt_buf_start -
 	 * pgt_buf_end) and free the other ones (pgt_buf_end - pgt_buf_top)

@@ -312,32 +332,14 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
 	 * RO all the pagetable pages, including the ones that are beyond
 	 * pgt_buf_end at that time.
 	 */
-	if (!after_bootmem && pgt_buf_end > pgt_buf_start)
+	if (pgt_buf_end > pgt_buf_start)
 		x86_init.mapping.pagetable_reserve(PFN_PHYS(pgt_buf_start),
 				PFN_PHYS(pgt_buf_end));
 
-	if (!after_bootmem)
-		early_memtest(start, end);
+	/* stop the wrong using */
+	pgt_buf_top = 0;
 
-	return ret >> PAGE_SHIFT;
-}
-
-void __init init_mem_mapping(void)
-{
-	probe_page_size_mask();
-
-	/* max_pfn_mapped is updated here */
-	max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
-	max_pfn_mapped = max_low_pfn_mapped;
-
-#ifdef CONFIG_X86_64
-	if (max_pfn > max_low_pfn) {
-		max_pfn_mapped = init_memory_mapping(1UL<<32,
-						     max_pfn<<PAGE_SHIFT);
-		/* can we preseve max_low_pfn ?*/
-		max_low_pfn = max_pfn;
-	}
-#endif
+	early_memtest(0, max_pfn_mapped << PAGE_SHIFT);
 }
 
 /*

1.7.7

It should take physical address range that will need to be mapped. find_early_table_space should take range that pgt buff should be in.

Separating page table size calculating and finding early page table to reduce confusing.

---
 arch/x86/mm/init.c |   38 +++++++++++++++++++++++++++-----------
 1 files changed, 27 insertions(+), 11 deletions(-)

index c273edb..2b8091c 100644
@@ -196,12 +196,10 @@ static int __meminit split_mem_range(struct map_range *mr, int nr_range,
  * mr[0].start to mr[nr_range - 1].end, while accounting for possible 2M and 1GB
  * pages. Then find enough contiguous space for those page tables.
  */
-static void __init find_early_table_space(unsigned long start, unsigned long end)
+static unsigned long __init calculate_table_space_size(unsigned long start, unsigned long end)
 {
 	int i;
 	unsigned long puds = 0, pmds = 0, ptes = 0, tables;
-	unsigned long good_end;
-	phys_addr_t base;
 	struct map_range mr[NR_RANGE_MR];
 	int nr_range;
 

@@ -240,9 +238,17 @@ static void __init find_early_table_space(unsigned long start, unsigned long end
 #ifdef CONFIG_X86_32
 	/* for fixmap */
 	tables += roundup(__end_of_fixed_addresses * sizeof(pte_t), PAGE_SIZE);
-	good_end = max_pfn_mapped << PAGE_SHIFT;
 #endif
 
+	return tables;
+}
+
+static void __init find_early_table_space(unsigned long start,
+					  unsigned long good_end,
+					  unsigned long tables)
+{
+	phys_addr_t base;
+
 	base = memblock_find_in_range(start, good_end, tables, PAGE_SIZE);
 	if (!base)
 		panic("Cannot find space for the kernel page tables");