xiaomi-sm8450/android_kernel_xiaomi_sm8450
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mm, page_owner: convert page_owner_inited to static key

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CONFIG_PAGE_OWNER attempts to impose negligible runtime overhead when
enabled during compilation, but not actually enabled during runtime by
boot param page_owner=on.  This overhead can be further reduced using
the static key mechanism, which this patch does.

Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Vlastimil Babka
2016-03-15 14:56:12 -07:00
committed by Linus Torvalds
parent 60f30350fd
commit 7dd80b8af0
4 changed files with 21 additions and 21 deletions
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2
mm/vmstat.c
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@@ -1120,7 +1120,7 @@ static void pagetypeinfo_showmixedcount(struct seq_file *m, pg_data_t *pgdat)
#ifdef CONFIG_PAGE_OWNER
int mtype;
if (!page_owner_inited)
if (!static_branch_unlikely(&page_owner_inited))
return;
drain_all_pages(NULL);