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| author | Namhyung Kim <namhyung@gmail.com> | 2011-03-22 16:32:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-22 17:44:02 -0700 |
| commit | 1d16871d8c96deadc5f9753b6b096074f2cbcbe1 (patch) | |
| tree | 9f3f0c5a60e7a5bf4bfa9f2bd4c9492db36cecfe | |
| parent | e64a782fec684c29a8204c51b3cb554dce588592 (diff) | |
| download | blackbird-op-linux-1d16871d8c96deadc5f9753b6b096074f2cbcbe1.tar.gz blackbird-op-linux-1d16871d8c96deadc5f9753b6b096074f2cbcbe1.zip | |
mm: batch-free pcp list if possible
free_pcppages_bulk() frees pages from pcp lists in a round-robin fashion
by keeping batch_free counter. But it doesn't need to spin if there is
only one non-empty list. This can be checked by batch_free ==
MIGRATE_PCPTYPES.
[akpm@linux-foundation.org: fix comment]
Signed-off-by: Namhyung Kim <namhyung@gmail.com>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/page_alloc.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 36a168e383b5..426056aff12a 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -614,6 +614,10 @@ static void free_pcppages_bulk(struct zone *zone, int count, list = &pcp->lists[migratetype]; } while (list_empty(list)); + /* This is the only non-empty list. Free them all. */ + if (batch_free == MIGRATE_PCPTYPES) + batch_free = to_free; + do { page = list_entry(list->prev, struct page, lru); /* must delete as __free_one_page list manipulates */ |
