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| author | Johannes Weiner <hannes@cmpxchg.org> | 2020-12-15 06:06:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-12-15 23:13:39 +0300 |
| commit | b8eddff8886b173b0a0f21a3bb1a594cc6d974d1 (patch) | |
| tree | d51af0968a8043adccb64e3811d13599635e7925 /mm/memcontrol.c | |
| parent | f38d58b7343882f5412a5e5719d9b302f305f2d1 (diff) | |
| download | linux-b8eddff8886b173b0a0f21a3bb1a594cc6d974d1.tar.xz | |
mm: memcontrol: add file_thp, shmem_thp to memory.stat
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.
[hannes@cmpxchg.org: add documentation]
Link: https://lkml.kernel.org/r/20201026174029.GC548555@cmpxchg.org
Link: https://lkml.kernel.org/r/20201022151844.489337-1-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Shakeel Butt <shakeelb@google.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 29459a6ce1c7..c3654510fb70 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1512,6 +1512,8 @@ 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 }, #endif { "inactive_anon", PAGE_SIZE, NR_INACTIVE_ANON }, { "active_anon", PAGE_SIZE, NR_ACTIVE_ANON }, @@ -1542,7 +1544,9 @@ static int __init memory_stats_init(void) for (i = 0; i < ARRAY_SIZE(memory_stats); i++) { #ifdef CONFIG_TRANSPARENT_HUGEPAGE - if (memory_stats[i].idx == NR_ANON_THPS) + if (memory_stats[i].idx == NR_ANON_THPS || + memory_stats[i].idx == NR_FILE_THPS || + memory_stats[i].idx == NR_SHMEM_THPS) memory_stats[i].ratio = HPAGE_PMD_SIZE; #endif VM_BUG_ON(!memory_stats[i].ratio); |