diff options
| author | Mel Gorman <mgorman@suse.de> | 2012-10-08 16:29:12 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:21 +0900 |
| commit | 1fb3f8ca0e9222535a39b884cb67a34628411b9f (patch) | |
| tree | 5e72498f44d4fcae18f29eb87dd05a849a7a23c9 /include/linux/mm.h | |
| parent | 83fde0f22872aa8c1d46f775cc7bdfa864499e65 (diff) | |
| download | lwn-1fb3f8ca0e9222535a39b884cb67a34628411b9f.tar.gz lwn-1fb3f8ca0e9222535a39b884cb67a34628411b9f.zip | |
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/mm.h')
| -rw-r--r-- | include/linux/mm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 0514fe9d3c84..5ddb11b2b4bb 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -442,6 +442,7 @@ void put_pages_list(struct list_head *pages); void split_page(struct page *page, unsigned int order); int split_free_page(struct page *page); +int capture_free_page(struct page *page, int alloc_order, int migratetype); /* * Compound pages have a destructor function. Provide a |