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| author |   Johannes Weiner <hannes@cmpxchg.org> | 2014-04-07 15:37:40 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-04-07 16:35:56 -0700 |
| commit | 59d1d256e156bb232700836b79d1ead5027f7b1d (patch) | |
| tree | 0548526e0ea68a5f9406e85feaebc51c2f866d02 /mm | |
| parent | mm: memcg: remove unnecessary preemption disabling (diff) | |
| download | linux-dev-59d1d256e156bb232700836b79d1ead5027f7b1d.tar.xz linux-dev-59d1d256e156bb232700836b79d1ead5027f7b1d.zip | |
mm: memcg: remove mem_cgroup_move_account_page_stat()
It used to disable preemption and run sanity checks but now it's only
taking a number out of one percpu counter and putting it into another.
Do this directly in the callsite and save the indirection.
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>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 28 |
1 files changed, 12 insertions, 16 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6e0f781412a2..b9928230a14c 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3744,16 +3744,6 @@ void mem_cgroup_split_huge_fixup(struct page *head) } #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ -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 */ - __this_cpu_sub(from->stat->count[idx], nr_pages); - __this_cpu_add(to->stat->count[idx], nr_pages); -} - /** * mem_cgroup_move_account - move account of the page * @page: the page @@ -3799,13 +3789,19 @@ static int mem_cgroup_move_account(struct page *page, move_lock_mem_cgroup(from, &flags); - if (!anon && page_mapped(page)) - mem_cgroup_move_account_page_stat(from, to, nr_pages, - MEM_CGROUP_STAT_FILE_MAPPED); + if (!anon && page_mapped(page)) { + __this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_FILE_MAPPED], + nr_pages); + __this_cpu_add(to->stat->count[MEM_CGROUP_STAT_FILE_MAPPED], + nr_pages); + } - if (PageWriteback(page)) - mem_cgroup_move_account_page_stat(from, to, nr_pages, - MEM_CGROUP_STAT_WRITEBACK); + if (PageWriteback(page)) { + __this_cpu_sub(from->stat->count[MEM_CGROUP_STAT_WRITEBACK], + nr_pages); + __this_cpu_add(to->stat->count[MEM_CGROUP_STAT_WRITEBACK], + nr_pages); + } mem_cgroup_charge_statistics(from, page, anon, -nr_pages); |