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mm, page_alloc: inline pageblock lookup in page free fast paths

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The function call overhead of get_pfnblock_flags_mask() is measurable in
the page free paths.  This patch uses an inlined version that is faster.

Signed-off-by: Mel Gorman <mgorman@techsingularity.net>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Mel Gorman 2016-05-19 17:14:27 -07:00 • committed by Linus Torvalds
parent e5b31ac2ca
commit 0b423ca22f
4 changed files with 102 additions and 97 deletions
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7
include/linux/mmzone.h
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@ -85,13 +85,6 @@ extern int page_group_by_mobility_disabled;
get_pfnblock_flags_mask(page, page_to_pfn(page), \
PB_migrate_end, MIGRATETYPE_MASK)
static inline int get_pfnblock_migratetype(struct page *page, unsigned long pfn)
{
BUILD_BUG_ON(PB_migrate_end - PB_migrate != 2);
return get_pfnblock_flags_mask(page, pfn, PB_migrate_end,
MIGRATETYPE_MASK);
}
struct free_area {
struct list_head free_list[MIGRATE_TYPES];
unsigned long nr_free;