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authorJohannes Weiner <hannes@cmpxchg.org>2020-12-15 06:06:20 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-12-15 23:13:39 +0300
commitb8eddff8886b173b0a0f21a3bb1a594cc6d974d1 (patch)
treed51af0968a8043adccb64e3811d13599635e7925 /mm/memcontrol.c
parentf38d58b7343882f5412a5e5719d9b302f305f2d1 (diff)
downloadlinux-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.c6
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);