diff options
| author | Roman Gushchin <[email protected]> | 2019-08-24 17:54:50 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-08-24 19:48:42 -0700 |
| commit | bb65f89b7d3d305c14951f49860711fbcae70692 (patch) | |
| tree | ef0341e09c5a221fa3a3044f456e2fbd07aa298c /tools/perf/util/trace-event-scripting.c | |
| parent | c350a99ea2b1b666c28948d74ab46c16913c28a7 (diff) | |
mm: memcontrol: flush percpu vmevents before releasing memcg
Similar to vmstats, percpu caching of local vmevents leads to an
accumulation of errors on non-leaf levels. This happens because some
leftovers may remain in percpu caches, so that they are never propagated
up by the cgroup tree and just disappear into nonexistence with on
releasing of the memory cgroup.
To fix this issue let's accumulate and propagate percpu vmevents values
before releasing the memory cgroup similar to what we're doing with
vmstats.
Since on cpu hotplug we do flush percpu vmstats anyway, we can iterate
only over online cpus.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: 42a300353577 ("mm: memcontrol: fix recursive statistics correctness & scalabilty")
Signed-off-by: Roman Gushchin <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Vladimir Davydov <[email protected]>
Cc: <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions