summaryrefslogtreecommitdiff
path: root/include/linux/compaction.h
diff options
context:
space:
mode:
authorMel Gorman <mgorman@suse.de>2012-10-08 16:29:12 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-10-09 16:22:21 +0900
commit1fb3f8ca0e9222535a39b884cb67a34628411b9f (patch)
tree5e72498f44d4fcae18f29eb87dd05a849a7a23c9 /include/linux/compaction.h
parent83fde0f22872aa8c1d46f775cc7bdfa864499e65 (diff)
mm: compaction: capture a suitable high-order page immediately when it is made available
While compaction is migrating pages to free up large contiguous blocks for allocation it races with other allocation requests that may steal these blocks or break them up. This patch alters direct compaction to capture a suitable free page as soon as it becomes available to reduce this race. It uses similar logic to split_free_page() to ensure that watermarks are still obeyed. Signed-off-by: Mel Gorman <mgorman@suse.de> Reviewed-by: Rik van Riel <riel@redhat.com> Reviewed-by: Minchan Kim <minchan@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/compaction.h')
-rw-r--r--include/linux/compaction.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/compaction.h b/include/linux/compaction.h
index ef658147e4e8..0e38a1deeb23 100644
--- a/include/linux/compaction.h
+++ b/include/linux/compaction.h
@@ -22,7 +22,7 @@ extern int sysctl_extfrag_handler(struct ctl_table *table, int write,
extern int fragmentation_index(struct zone *zone, unsigned int order);
extern unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *mask,
- bool sync, bool *contended);
+ bool sync, bool *contended, struct page **page);
extern int compact_pgdat(pg_data_t *pgdat, int order);
extern unsigned long compaction_suitable(struct zone *zone, int order);
@@ -64,7 +64,7 @@ static inline bool compaction_deferred(struct zone *zone, int order)
#else
static inline unsigned long try_to_compact_pages(struct zonelist *zonelist,
int order, gfp_t gfp_mask, nodemask_t *nodemask,
- bool sync, bool *contended)
+ bool sync, bool *contended, struct page **page)
{
return COMPACT_CONTINUE;
}