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mm: memcg: clean up fault accounting 

The fault accounting functions have a single, memcg-internal user, so they
don't need to be global.  In fact, their one-line bodies can be directly
folded into the caller.  And since faults happen one at a time, use
this_cpu_inc() directly instead of this_cpu_add(foo, 1).

Signed-off-by: Johannes Weiner <jweiner@redhat.com>
Acked-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Acked-by: Balbir Singh <bsingharora@gmail.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Hugh Dickins <hughd@google.com>
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 2012-01-12 17:18:35 -08:00 committed by Linus Torvalds
parent 72835c86ca
commit 0e574a932d
1 changed files with 4 additions and 14 deletions
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18
mm/memcontrol.c
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@ -655,16 +655,6 @@ static void mem_cgroup_swap_statistics(struct mem_cgroup *memcg,
this_cpu_add(memcg->stat->count[MEM_CGROUP_STAT_SWAPOUT], val);
}
void mem_cgroup_pgfault(struct mem_cgroup *memcg, int val)
{
this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT], val);
}
void mem_cgroup_pgmajfault(struct mem_cgroup *memcg, int val)
{
this_cpu_add(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT], val);
}
static unsigned long mem_cgroup_read_events(struct mem_cgroup *memcg,
enum mem_cgroup_events_index idx)
{
@ -978,11 +968,11 @@ void mem_cgroup_count_vm_event(struct mm_struct *mm, enum vm_event_item idx)
goto out;
switch (idx) {
case PGMAJFAULT:
mem_cgroup_pgmajfault(memcg, 1);
break;
case PGFAULT:
mem_cgroup_pgfault(memcg, 1);
this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGFAULT]);
break;
case PGMAJFAULT:
this_cpu_inc(memcg->stat->events[MEM_CGROUP_EVENTS_PGMAJFAULT]);
break;
default:
BUG();