On Sun, Oct 25, 2020 at 11:37:25AM -0700, Andrew Morton wrote:
> On Thu, 22 Oct 2020 11:18:44 -0400 Johannes Weiner <hannes@xxxxxxxxxxx> wrote:
>
> > As huge page usage in the page cache and for shmem files proliferates
> > in our production environment, the performance monitoring team has
> > asked for per-cgroup stats on those pages.
> >
> > We already track and export anon_thp per cgroup. We already track file
> > THP and shmem THP per node, so making them per-cgroup is only a matter
> > of switching from node to lruvec counters. All callsites are in places
> > where the pages are charged and locked, so page->memcg is stable.
> >
> > ...
> >
> > --- a/mm/memcontrol.c
> > +++ b/mm/memcontrol.c
> > @@ -1507,6 +1507,8 @@ static struct memory_stat memory_stats[] = {
> > * constant(e.g. powerpc).
> > */
> > { "anon_thp", 0, NR_ANON_THPS },
> > + { "file_thp", 0, NR_FILE_THPS },
> > + { "shmem_thp", 0, NR_SHMEM_THPS },
>
> Documentation/admin-guide/cgroup-v2.rst is owed an update?
Ah yes. This?
>From 310c3e1714e1c093d4cd26dff38326fc348cdd31 Mon Sep 17 00:00:00 2001
From: Johannes Weiner <hannes@xxxxxxxxxxx>
Date: Mon, 26 Oct 2020 13:39:19 -0400
Subject: [PATCH] mm: memcontrol: add file_thp, shmem_thp to memory.stat fix
Signed-off-by: Johannes Weiner <hannes@xxxxxxxxxxx>
---
Documentation/admin-guide/cgroup-v2.rst | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst
index 608d7c279396..515bb13084a0 100644
--- a/Documentation/admin-guide/cgroup-v2.rst
+++ b/Documentation/admin-guide/cgroup-v2.rst
@@ -1300,6 +1300,14 @@ PAGE_SIZE multiple when read back.
Amount of memory used in anonymous mappings backed by
transparent hugepages
+ file_thp
+ Amount of cached filesystem data backed by transparent
+ hugepages
+
+ shmem_thp
+ Amount of shm, tmpfs, shared anonymous mmap()s backed by
+ transparent hugepages
+
inactive_anon, active_anon, inactive_file, active_file, unevictable
Amount of memory, swap-backed and filesystem-backed,
on the internal memory management lists used by the
--
2.29.0
