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mm: memcg: remove unnecessary preemption disabling 

lock_page_cgroup() disables preemption, remove explicit preemption
disabling for code paths holding this lock.

Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.cz>
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 2014-04-07 15:37:39 -07:00 committed by Linus Torvalds
parent d230dec18d
commit 7af467e8e1
1 changed files with 4 additions and 11 deletions
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15
mm/memcontrol.c
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@ -921,8 +921,6 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
struct page *page,
bool anon, int nr_pages)
{
preempt_disable();
/*
* Here, RSS means 'mapped anon' and anon's SwapCache. Shmem/tmpfs is
* counted as CACHE even if it's on ANON LRU.
@ -947,8 +945,6 @@ static void mem_cgroup_charge_statistics(struct mem_cgroup *memcg,
}
__this_cpu_add(memcg->stat->nr_page_events, nr_pages);
preempt_enable();
}
unsigned long
@ -3748,17 +3744,14 @@ void mem_cgroup_split_huge_fixup(struct page *head)
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
static inline
void mem_cgroup_move_account_page_stat(struct mem_cgroup *from,
struct mem_cgroup *to,
unsigned int nr_pages,
enum mem_cgroup_stat_index idx)
static void mem_cgroup_move_account_page_stat(struct mem_cgroup *from,
struct mem_cgroup *to,
unsigned int nr_pages,
enum mem_cgroup_stat_index idx)
{
/* Update stat data for mem_cgroup */
preempt_disable();
__this_cpu_sub(from->stat->count[idx], nr_pages);
__this_cpu_add(to->stat->count[idx], nr_pages);
preempt_enable();
}
/**