On Sun, Jun 12, 2022 at 8:18 PM Huang, Shaoqin <shaoqin.huang@xxxxxxxxx> wrote: > > > > On 6/7/2022 6:20 AM, Yosry Ahmed wrote: > > Add NR_SECONDARY_PAGETABLE stat to count secondary page table uses, e.g. > > KVM mmu. This provides more insights on the kernel memory used > > by a workload. > > > > This stat will be used by subsequent patches to count KVM mmu > > memory usage. > > > > Signed-off-by: Yosry Ahmed <yosryahmed@xxxxxxxxxx> > > --- > > Documentation/admin-guide/cgroup-v2.rst | 5 +++++ > > Documentation/filesystems/proc.rst | 4 ++++ > > drivers/base/node.c | 2 ++ > > fs/proc/meminfo.c | 2 ++ > > include/linux/mmzone.h | 1 + > > mm/memcontrol.c | 1 + > > mm/page_alloc.c | 6 +++++- > > mm/vmstat.c | 1 + > > 8 files changed, 21 insertions(+), 1 deletion(-) > > > > diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst > > index 69d7a6983f781..307a284b99189 100644 > > --- a/Documentation/admin-guide/cgroup-v2.rst > > +++ b/Documentation/admin-guide/cgroup-v2.rst > > @@ -1312,6 +1312,11 @@ PAGE_SIZE multiple when read back. > > pagetables > > Amount of memory allocated for page tables. > > > > + sec_pagetables > > + Amount of memory allocated for secondary page tables, > > + this currently includes KVM mmu allocations on x86 > > + and arm64. > > + > > percpu (npn) > > Amount of memory used for storing per-cpu kernel > > data structures. > > diff --git a/Documentation/filesystems/proc.rst b/Documentation/filesystems/proc.rst > > index 061744c436d99..894d6317f3bdc 100644 > > --- a/Documentation/filesystems/proc.rst > > +++ b/Documentation/filesystems/proc.rst > > @@ -973,6 +973,7 @@ You may not have all of these fields. > > SReclaimable: 159856 kB > > SUnreclaim: 124508 kB > > PageTables: 24448 kB > > + SecPageTables: 0 kB > > NFS_Unstable: 0 kB > > Bounce: 0 kB > > WritebackTmp: 0 kB > > @@ -1067,6 +1068,9 @@ SUnreclaim > > PageTables > > amount of memory dedicated to the lowest level of page > > tables. > > +SecPageTables > > + amount of memory dedicated to secondary page tables, this > > + currently includes KVM mmu allocations on x86 and arm64. > > Just a notice. This patch in the latest 5.19.0-rc2+ have a conflict in > Documentation/filesystems/proc.rst file. But that's not a problem. Thanks for pointing this out. Let me know if a rebase and resend is necessary. <snip>
