Patch "kvm, mm: account shadow page tables to kmemcg" has been added to the 4.4-stable tree

This is a note to let you know that I've just added the patch titled

kvm, mm: account shadow page tables to kmemcg

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kvm-mm-account-shadow-page-tables-to-kmemcg.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From d97e5e6160c0e0a23963ec198c7cb1c69e6bf9e8 Mon Sep 17 00:00:00 2001
From: Shakeel Butt <[email protected]>
Date: Thu, 26 Jul 2018 16:37:45 -0700
Subject: kvm, mm: account shadow page tables to kmemcg
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Shakeel Butt <[email protected]>

commit d97e5e6160c0e0a23963ec198c7cb1c69e6bf9e8 upstream.

The size of kvm's shadow page tables corresponds to the size of the guest virtual machines on the system. Large VMs can spend a significant amount of memory as shadow page tables which can not be left as system memory overhead. So, account shadow page tables to the kmemcg.

[[email protected]: replace (GFP_KERNEL|__GFP_ACCOUNT) with GFP_KERNEL_ACCOUNT]

Link http://lkml.kernel.org/r/[email protected] open here

Link http://lkml.kernel.org/r/[email protected] open here

Signed-off-by Shakeel Butt <[email protected]>

Cc Michal Hocko <[email protected]>

Cc Johannes Weiner <[email protected]>

Cc Vladimir Davydov <[email protected]>

Cc Paolo Bonzini <[email protected]>

Cc Greg Thelen <[email protected]>

Cc Radim Krčmář <[email protected]>

Cc Peter Feiner <[email protected]>

Cc <[email protected]>

Signed-off-by Andrew Morton <[email protected]>

Signed-off-by Linus Torvalds <[email protected]>

Signed-off-by Greg Kroah-Hartman <[email protected]>

---
 arch/x86/kvm/mmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

arch/x86/kvm/mmu.c +1 -1

@@ -692,7 +692,7 @@ static int mmu_topup_memory_cache_page(s
        if (cache->nobjs >= min)
                return 0;
        while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
-               page = (void *)__get_free_page(GFP_KERNEL);
+               page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
                if (!page)
                        return -ENOMEM;
                cache->objects[cache->nobjs++] = page;

Patches currently in stable-queue which might be from [email protected] are

queue-4.4/kvm-mm-account-shadow-page-tables-to-kmemcg.patch

Quoted 13 lines · On Sat, Jul 28, 2018 at 1:11 AM <[email protected]> wrote:

This is a note to let you know that I've just added the patch titled

kvm, mm: account shadow page tables to kmemcg

to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
kvm-mm-account-shadow-page-tables-to-kmemcg.patch
and it can be found in the queue-4.4 subdirectory.

Quoted 3 lines

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

Hi Greg, this patch requires some more changes to be effective on 4.4 kernel as kmem charging is still not in the generic page allocator code path in 4.4.