The patch titled
Subject: mm, kvm: account kvm_vcpu_mmap to kmemcg
has been added to the -mm tree. Its filename is
mm-kvm-account-kvm_vcpu_mmap-to-kmemcg.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-kvm-account-kvm_vcpu_mmap-to-kmemcg.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-kvm-account-kvm_vcpu_mmap-to-kmemcg.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
From: Shakeel Butt <shakeelb@xxxxxxxxxx>
Subject: mm, kvm: account kvm_vcpu_mmap to kmemcg
A VCPU of a VM can allocate couple of pages which can be mmap'ed by the
user space application. At the moment this memory is not charged to the
memcg of the VMM. On a large machine running large number of VMs or
small number of VMs having large number of VCPUs, this unaccounted
memory can be very significant. So, charge this memory to the memcg of
the VMM. Please note that lifetime of these allocations corresponds to
the lifetime of the VMM.
Link: https://lkml.kernel.org/r/20201106202923.2087414-1-shakeelb@xxxxxxxxxx
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Acked-by: Roman Gushchin <guro@xxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/s390/kvm/kvm-s390.c | 2 +-
arch/x86/kvm/x86.c | 2 +-
virt/kvm/coalesced_mmio.c | 2 +-
virt/kvm/kvm_main.c | 2 +-
4 files changed, 4 insertions(+), 4 deletions(-)
--- a/arch/s390/kvm/kvm-s390.c~mm-kvm-account-kvm_vcpu_mmap-to-kmemcg
+++ a/arch/s390/kvm/kvm-s390.c
@@ -3243,7 +3243,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu
int rc;
BUILD_BUG_ON(sizeof(struct sie_page) != 4096);
- sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL);
+ sie_page = (struct sie_page *) get_zeroed_page(GFP_KERNEL_ACCOUNT);
if (!sie_page)
return -ENOMEM;
--- a/arch/x86/kvm/x86.c~mm-kvm-account-kvm_vcpu_mmap-to-kmemcg
+++ a/arch/x86/kvm/x86.c
@@ -9829,7 +9829,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu
r = -ENOMEM;
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ page = alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);
if (!page)
goto fail_free_lapic;
vcpu->arch.pio_data = page_address(page);
--- a/virt/kvm/coalesced_mmio.c~mm-kvm-account-kvm_vcpu_mmap-to-kmemcg
+++ a/virt/kvm/coalesced_mmio.c
@@ -111,7 +111,7 @@ int kvm_coalesced_mmio_init(struct kvm *
{
struct page *page;
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ page = alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);
if (!page)
return -ENOMEM;
--- a/virt/kvm/kvm_main.c~mm-kvm-account-kvm_vcpu_mmap-to-kmemcg
+++ a/virt/kvm/kvm_main.c
@@ -3116,7 +3116,7 @@ static int kvm_vm_ioctl_create_vcpu(stru
}
BUILD_BUG_ON(sizeof(struct kvm_run) > PAGE_SIZE);
- page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+ page = alloc_page(GFP_KERNEL_ACCOUNT | __GFP_ZERO);
if (!page) {
r = -ENOMEM;
goto vcpu_free;
_
Patches currently in -mm which might be from shakeelb@xxxxxxxxxx are
mm-rmap-always-do-ttu_ignore_access.patch
mm-kvm-account-kvm_vcpu_mmap-to-kmemcg.patch
