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mm: memcg: remove mem_cgroup_move_account_page_stat()

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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>
This commit is contained in:
Johannes Weiner 2014-04-07 15:37:40 -07:00 committed by Linus Torvalds
parent 7af467e8e1
commit 59d1d256e1
1 changed files with 12 additions and 16 deletions
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28
mm/memcontrol.c
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@ -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);