Re: [PATCH] kvm, mm: account shadow page tables to kmemcg

On 27/06/2018 20:13, Shakeel Butt wrote:

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.

Signed-off-by: Shakeel Butt shakeelb@google.com

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

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index d594690d8b95..c79a398300f5 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -890,7 +890,7 @@ static int mmu_topup_memory_cache_page(struct kvm_mmu_memory_cache *cache, 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|__GFP_ACCOUNT);
  

  if (!page) return -ENOMEM; cache->objects[cache->nobjs++] = page;

Queued, with

Cc: stable@vger.kernel.org

Thanks,

Paolo