buffermem_pages removal (1/5)

PATCH New Christoph Hellwig 1 participant 1 message May 21, 2002

Subsystems (9)

Arm (32-bit) MIPS s390 SuperH +5 more subsystems

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Christoph Hellwig

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2002-05-21 13:09 UTC #0 lore raw

PATCH 1/1 buffermem_pages removal (1/5)

With all work done by akpm in 2.5 Linus no more has a buffer cache in the traditional sense. Still we try to keep estimates about what would be the buffer cache size by keeping the number of pages indexed by block device inodes. This is broken not only because the old buffercache was also used for file data which is nowdays not hashed to block device inodes and thus makes every user of this data assume wrong numbers. Second is is possible to use block device pages not through the buffer_head interface (i.e. userspace block device nodes, possibly JFS also soon). In addition the atomic_t used for this bookkepping (buffermem_pages) causes cacheline bouncing on larger machines.

This is the first patch of a series to get rid of it. It removes the useless output of supposedly buffer pages in show_mem(), which is used by the magic sysrq key code.

arch/alpha/mm/init.c +0 -1

@@ -137,7 +137,6 @@
 	printk("%ld reserved pages\n",reserved);
 	printk("%ld pages shared\n",shared);
 	printk("%ld pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 #endif

arch/alpha/mm/numa.c +0 -1

@@ -425,5 +425,4 @@
 	printk("%ld pages shared\n",shared);
 	printk("%ld pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }

arch/arm/mm/init.c +0 -1

@@ -100,7 +100,6 @@
 	printk("%d slab pages\n", slab);
 	printk("%d pages shared\n", shared);
 	printk("%d pages swap cached\n", cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 struct node_info {

arch/cris/mm/init.c +0 -1

@@ -181,7 +181,6 @@
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /*

arch/i386/mm/init.c +0 -1

@@ -93,7 +93,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/ia64/mm/init.c +0 -1

@@ -187,7 +187,6 @@
 			pgdat = pgdat->node_next;
 		} while (pgdat);
 		printk("Total of %ld pages in page table cache\n", pgtable_cache_size);
-		printk("%ld buffermem pages\n", nr_buffermem_pages());
 		printk("%d free buffer pages\n", nr_free_buffer_pages());
 	}
 #else /* !CONFIG_DISCONTIGMEM */

arch/m68k/mm/init.c +0 -1

@@ -107,7 +107,6 @@
     printk("%d pages shared\n",shared);
     printk("%d pages swap cached\n",cached);
     printk("%ld pages in page table cache\n",pgtable_cache_size);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 extern void init_pointer_table(unsigned long ptable);

arch/mips/mm/init.c +0 -1

@@ -135,7 +135,6 @@
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n",pgtable_cache_size);
 	printk("%d free pages\n", free);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/mips64/mm/init.c +0 -1

@@ -339,7 +339,6 @@
 	printk("%d pages swap cached\n",cached);
 	printk("%ld pages in page table cache\n", pgtable_cache_size);
 	printk("%d free pages\n", free);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 #ifndef CONFIG_DISCONTIGMEM

arch/parisc/mm/init.c +0 -1

@@ -154,7 +154,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void set_pte_phys (unsigned long vaddr, unsigned long phys)

arch/ppc/mm/init.c +0 -1

@@ -140,7 +140,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* Free up now-unused memory */

arch/ppc64/mm/init.c +0 -1

@@ -134,7 +134,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void *

arch/s390/mm/init.c +0 -1

@@ -87,7 +87,6 @@
         printk("%d pages shared\n",shared);
         printk("%d pages swap cached\n",cached);
         printk("%ld pages in page table cache\n",pgtable_cache_size);
-        printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/s390x/mm/init.c +0 -1

@@ -87,7 +87,6 @@
         printk("%d pages shared\n",shared);
         printk("%d pages swap cached\n",cached);
         printk("%ld pages in page table cache\n",pgtable_cache_size);
-        printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/sh/mm/init.c +0 -1

@@ -70,7 +70,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */

arch/sparc/mm/init.c +0 -1

@@ -82,7 +82,6 @@
 	if (sparc_cpu_model == sun4m || sparc_cpu_model == sun4d)
 		printk("%ld entries in page dir cache\n",pgd_cache_size);
 #endif	
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 extern pgprot_t protection_map[16];

arch/sparc64/mm/init.c +0 -1

@@ -341,7 +341,6 @@
 #ifndef CONFIG_SMP
 	printk("%d entries in page dir cache\n",pgd_cache_size);
 #endif	
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 void mmu_info(struct seq_file *m)

arch/x86_64/mm/init.c +0 -1

@@ -67,7 +67,6 @@
 	printk("%d reserved pages\n",reserved);
 	printk("%d pages shared\n",shared);
 	printk("%d pages swap cached\n",cached);
-	printk("%ld buffermem pages\n", nr_buffermem_pages());
 }
 
 /* References to section boundaries */