releases/4.14.60/kvm-mm-account-shadow-page-tables-to-kmemcg.patch

   1 From d97e5e6160c0e0a23963ec198c7cb1c69e6bf9e8 Mon Sep 17 00:00:00 2001
   2 From: Shakeel Butt <shakeelb@google.com>
   3 Date: Thu, 26 Jul 2018 16:37:45 -0700
   4 Subject: kvm, mm: account shadow page tables to kmemcg
   5 MIME-Version: 1.0
   6 Content-Type: text/plain; charset=UTF-8
   7 Content-Transfer-Encoding: 8bit
   8
   9 From: Shakeel Butt <shakeelb@google.com>
  10
  11 commit d97e5e6160c0e0a23963ec198c7cb1c69e6bf9e8 upstream.
  12
  13 The size of kvm's shadow page tables corresponds to the size of the
  14 guest virtual machines on the system.  Large VMs can spend a significant
  15 amount of memory as shadow page tables which can not be left as system
  16 memory overhead.  So, account shadow page tables to the kmemcg.
  17
  18 [shakeelb@google.com: replace (GFP_KERNEL|__GFP_ACCOUNT) with GFP_KERNEL_ACCOUNT]
  19   Link: http://lkml.kernel.org/r/20180629140224.205849-1-shakeelb@google.com
  20 Link: http://lkml.kernel.org/r/20180627181349.149778-1-shakeelb@google.com
  21 Signed-off-by: Shakeel Butt <shakeelb@google.com>
  22 Cc: Michal Hocko <mhocko@kernel.org>
  23 Cc: Johannes Weiner <hannes@cmpxchg.org>
  24 Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
  25 Cc: Paolo Bonzini <pbonzini@redhat.com>
  26 Cc: Greg Thelen <gthelen@google.com>
  27 Cc: Radim Krčmář <rkrcmar@redhat.com>
  28 Cc: Peter Feiner <pfeiner@google.com>
  29 Cc: <stable@vger.kernel.org>
  30 Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
  31 Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
  32 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  33
  34 ---
  35  arch/x86/kvm/mmu.c |    2 +-
  36  1 file changed, 1 insertion(+), 1 deletion(-)
  37
  38 --- a/arch/x86/kvm/mmu.c
  39 +++ b/arch/x86/kvm/mmu.c
  40 @@ -890,7 +890,7 @@ static int mmu_topup_memory_cache_page(s
  41         if (cache->nobjs >= min)
  42                 return 0;
  43         while (cache->nobjs < ARRAY_SIZE(cache->objects)) {
  44 -               page = (void *)__get_free_page(GFP_KERNEL);
  45 +               page = (void *)__get_free_page(GFP_KERNEL_ACCOUNT);
  46                 if (!page)
  47                         return -ENOMEM;
  48                 cache->objects[cache->nobjs++] = page;