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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>
This commit is contained in:
Johannes Weiner 2012-05-29 15:07:07 -07:00 committed by Linus Torvalds
parent 78ccf5b5ab
commit 13114716c7
1 changed files with 3 additions and 3 deletions
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6
mm/memcontrol.c
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@ -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) {