Patch "kvm, mm: account kvm related kmem slabs to kmemcg" has been added to the 4.9-stable tree

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

kvm, mm: account kvm related kmem slabs to kmemcg

to the 4.9-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-kvm-related-kmem-slabs-to-kmemcg.patch
and it can be found in the queue-4.9 subdirectory.

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

From: Shakeel Butt <[email protected]>
Date: Thu, 5 Oct 2017 18:07:24 -0700
Subject: kvm, mm: account kvm related kmem slabs to kmemcg

From: Shakeel Butt <[email protected]>

[ Upstream commit 46bea48ac241fe0b413805952dda74dd0c09ba8b ]

The kvm slabs can consume a significant amount of system memory and indeed in our production environment we have observed that a lot of machines are spending significant amount of memory that can not be left as system memory overhead. Also the allocations from these slabs can be triggered directly by user space applications which has access to kvm and thus a buggy application can leak such memory. So, these caches should be accounted to kmemcg.

---
 arch/x86/kvm/mmu.c  |    4 ++--
 virt/kvm/kvm_main.c |    2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

@@ -5052,13 +5052,13 @@ int kvm_mmu_module_init(void)
 {
 	pte_list_desc_cache = kmem_cache_create("pte_list_desc",
 					    sizeof(struct pte_list_desc),
-					    0, 0, NULL);
+					    0, SLAB_ACCOUNT, NULL);
 	if (!pte_list_desc_cache)
 		goto nomem;
 
 	mmu_page_header_cache = kmem_cache_create("kvm_mmu_page_header",
 						  sizeof(struct kvm_mmu_page),
-						  0, 0, NULL);
+						  0, SLAB_ACCOUNT, NULL);
 	if (!mmu_page_header_cache)
 		goto nomem;
 

@@ -3904,7 +3904,7 @@ int kvm_init(void *opaque, unsigned vcpu
 	if (!vcpu_align)
 		vcpu_align = __alignof__(struct kvm_vcpu);
 	kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align,
-					   0, NULL);
+					   SLAB_ACCOUNT, NULL);
 	if (!kvm_vcpu_cache) {
 		r = -ENOMEM;
 		goto out_free_3;

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

queue-4.9/kvm-mm-account-kvm-related-kmem-slabs-to-kmemcg.patch