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authorJohannes Weiner <hannes@cmpxchg.org>2012-05-29 15:07:07 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-29 16:22:27 -0700
commit13114716c744afe165c2148c944ed0306658921c (patch)
tree3b0d3022ae3b9725bc0243414e6f74939bbdaeb1 /mm/memcontrol.c
parent78ccf5b5ab834080db25d8128e7dd33594cbf4df (diff)
downloadop-kernel-dev-13114716c744afe165c2148c944ed0306658921c.zip
op-kernel-dev-13114716c744afe165c2148c944ed0306658921c.tar.gz
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/memcontrol.c')
-rw-r--r--mm/memcontrol.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 4200f5c..b7b2306 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) {
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