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| author | Johannes Weiner <hannes@cmpxchg.org> | 2012-05-29 15:07:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-29 16:22:27 -0700 |
| commit | 13114716c744afe165c2148c944ed0306658921c (patch) | |
| tree | 3b0d3022ae3b9725bc0243414e6f74939bbdaeb1 /mm | |
| parent | 78ccf5b5ab834080db25d8128e7dd33594cbf4df (diff) | |
| download | lwn-13114716c744afe165c2148c944ed0306658921c.tar.gz lwn-13114716c744afe165c2148c944ed0306658921c.zip | |
mm: memcg: keep ratelimit counter separate from event counters
All events except the ratelimit counter are statistics exported to
userspace. Keep this internal value out of the event count array.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ying Han <yinghan@google.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4200f5c59579..b7b230606f2c 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -94,7 +94,6 @@ enum mem_cgroup_stat_index { enum mem_cgroup_events_index { MEM_CGROUP_EVENTS_PGPGIN, /* # of pages paged in */ MEM_CGROUP_EVENTS_PGPGOUT, /* # of pages paged out */ - MEM_CGROUP_EVENTS_COUNT, /* # of pages paged in/out */ MEM_CGROUP_EVENTS_PGFAULT, /* # of page-faults */ MEM_CGROUP_EVENTS_PGMAJFAULT, /* # of major page-faults */ MEM_CGROUP_EVENTS_NSTATS, @@ -118,6 +117,7 @@ enum mem_cgroup_events_target { struct mem_cgroup_stat_cpu { long count[MEM_CGROUP_STAT_NSTATS]; unsigned long events[MEM_CGROUP_EVENTS_NSTATS]; + unsigned long nr_page_events; unsigned long targets[MEM_CGROUP_NTARGETS]; }; @@ -716,7 +716,7 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg, nr_pages = -nr_pages; /* for event */ } - __this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT], nr_pages); + __this_cpu_add(memcg->stat->nr_page_events, nr_pages); preempt_enable(); } @@ -777,7 +777,7 @@ static bool mem_cgroup_event_ratelimit(struct mem_cgroup *memcg, { unsigned long val, next; - val = __this_cpu_read(memcg->stat->events[MEM_CGROUP_EVENTS_COUNT]); + val = __this_cpu_read(memcg->stat->nr_page_events); next = __this_cpu_read(memcg->stat->targets[target]); /* from time_after() in jiffies.h */ if ((long)next - (long)val < 0) { |