diff options
| author | Mel Gorman <[email protected]> | 2012-01-12 17:19:38 -0800 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2012-01-12 20:13:09 -0800 |
| commit | c82449352854ff09e43062246af86bdeb628f0c3 (patch) | |
| tree | 9cb8052e425c8cdab24ac41e83bbb672832ce54e /include/linux | |
| parent | b969c4ab9f182a6e1b2a0848be349f99714947b0 (diff) | |
mm: compaction: make isolate_lru_page() filter-aware again
Commit 39deaf85 ("mm: compaction: make isolate_lru_page() filter-aware")
noted that compaction does not migrate dirty or writeback pages and that
is was meaningless to pick the page and re-add it to the LRU list. This
had to be partially reverted because some dirty pages can be migrated by
compaction without blocking.
This patch updates "mm: compaction: make isolate_lru_page" by skipping
over pages that migration has no possibility of migrating to minimise LRU
disruption.
Signed-off-by: Mel Gorman <[email protected]>
Reviewed-by: Rik van Riel<[email protected]>
Cc: Andrea Arcangeli <[email protected]>
Reviewed-by: Minchan Kim <[email protected]>
Cc: Dave Jones <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Andy Isaacson <[email protected]>
Cc: Nai Xia <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mmzone.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 42e544cd4c9f..2038b90ca6e3 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -177,6 +177,8 @@ struct lruvec { #define ISOLATE_CLEAN ((__force isolate_mode_t)0x4) /* Isolate unmapped file */ #define ISOLATE_UNMAPPED ((__force isolate_mode_t)0x8) +/* Isolate for asynchronous migration */ +#define ISOLATE_ASYNC_MIGRATE ((__force isolate_mode_t)0x10) /* LRU Isolation modes. */ typedef unsigned __bitwise__ isolate_mode_t; |