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Date: Tue, 11 Mar 2014 21:28:27 -0400 From: Johannes Weiner <hannes@...xchg.org> To: Andrew Morton <akpm@...ux-foundation.org> Cc: Michal Hocko <mhocko@...e.cz>, linux-mm@...ck.org, cgroups@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [patch 1/8] 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@...xchg.org> Acked-by: Michal Hocko <mhocko@...e.cz> --- mm/memcontrol.c | 15 ++++----------- 1 file changed, 4 insertions(+), 11 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 5b6b0039f725..393864c162ac 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -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 @@ -3780,17 +3776,14 @@ 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(); } /** -- 1.9.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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