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| author |   Chris Down <chris@chrisdown.name> | 2019-03-05 15:48:09 -0800 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 21:07:19 -0800 |
| commit | 1ff9e6e1798c7670ea6a7680a1ad5582df2fa914 (patch) | |
| tree | 6050ceb4029e34bd694454533bb81d02b5afa9c9 /Documentation | |
| parent | mm: vmscan: do not iterate all mem cgroups for global direct reclaim (diff) | |
| download | linux-dev-1ff9e6e1798c7670ea6a7680a1ad5582df2fa914.tar.xz linux-dev-1ff9e6e1798c7670ea6a7680a1ad5582df2fa914.zip | |
mm: memcontrol: expose THP events on a per-memcg basis
Currently THP allocation events data is fairly opaque, since you can
only get it system-wide. This patch makes it easier to reason about
transparent hugepage behaviour on a per-memcg basis.
For anonymous THP-backed pages, we already have MEMCG_RSS_HUGE in v1,
which is used for v1's rss_huge [sic]. This is reused here as it's
fairly involved to untangle NR_ANON_THPS right now to make it per-memcg,
since right now some of this is delegated to rmap before we have any
memcg actually assigned to the page. It's a good idea to rework that,
but let's leave untangling THP allocation for a future patch.
[akpm@linux-foundation.org: fix build]
[chris@chrisdown.name: fix memcontrol build when THP is disabled]
Link: http://lkml.kernel.org/r/20190131160802.GA5777@chrisdown.name
Link: http://lkml.kernel.org/r/20190129205852.GA7310@chrisdown.name
Signed-off-by: Chris Down <chris@chrisdown.name>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Roman Gushchin <guro@fb.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/cgroup-v2.rst | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/admin-guide/cgroup-v2.rst b/Documentation/admin-guide/cgroup-v2.rst index 7bf3f129c68b..53d3288c328b 100644 --- a/Documentation/admin-guide/cgroup-v2.rst +++ b/Documentation/admin-guide/cgroup-v2.rst @@ -1189,6 +1189,10 @@ PAGE_SIZE multiple when read back. Amount of cached filesystem data that was modified and is currently being written back to disk + anon_thp + Amount of memory used in anonymous mappings 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 @@ -1248,6 +1252,18 @@ PAGE_SIZE multiple when read back. Amount of reclaimed lazyfree pages + thp_fault_alloc + + Number of transparent hugepages which were allocated to satisfy + a page fault, including COW faults. This counter is not present + when CONFIG_TRANSPARENT_HUGEPAGE is not set. + + thp_collapse_alloc + + Number of transparent hugepages which were allocated to allow + collapsing an existing range of pages. This counter is not + present when CONFIG_TRANSPARENT_HUGEPAGE is not set. + memory.swap.current A read-only single value file which exists on non-root cgroups. |