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 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: kvm-mm-account-kvm-related-kmem-slabs-to-kmemcg.patch and it can be found in the queue-4.14 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let stable@vger.kernel.org know about it.

From foo@baz Wed Dec 20 18:17:52 CET 2017

From: Shakeel Butt shakeelb@google.com Date: Thu, 5 Oct 2017 18:07:24 -0700 Subject: kvm, mm: account kvm related kmem slabs to kmemcg

From: Shakeel Butt shakeelb@google.com

[ 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.

Signed-off-by: Shakeel Butt shakeelb@google.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/x86/kvm/mmu.c | 4 ++-- virt/kvm/kvm_main.c | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-)

--- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -5476,13 +5476,13 @@ 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;

--- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -4018,7 +4018,7 @@ 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 shakeelb@google.com are

queue-4.14/kvm-mm-account-kvm-related-kmem-slabs-to-kmemcg.patch