| commit | 86c79f6b5426ce118d32c73fa9e328f0a86ab590 | [log] [tgz] |
|---|---|---|
| author | Mel Gorman <[email protected]> | Thu Jul 28 15:45:59 2016 -0700 |
| committer | Linus Torvalds <[email protected]> | Thu Jul 28 16:07:41 2016 -0700 |
| tree | 8cc32bcea6199c34326976a043b49c4df82a5851 | |
| parent | 6256c6b499a1689d62ddfcb38d8048f9cd177070 [diff] |
mm: vmscan: do not reclaim from kswapd if there is any eligible zone kswapd scans from highest to lowest for a zone that requires balancing. This was necessary when reclaim was per-zone to fairly age pages on lower zones. Now that we are reclaiming on a per-node basis, any eligible zone can be used and pages will still be aged fairly. This patch avoids reclaiming excessively unless buffer_heads are over the limit and it's necessary to reclaim from a higher zone than requested by the waker of kswapd to relieve low memory pressure. [[email protected]: Force kswapd reclaim no more than needed] Link: http://lkml.kernel.org/r/[email protected] Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Mel Gorman <[email protected]> Signed-off-by: Hillf Danton <[email protected]> Acked-by: Vlastimil Babka <[email protected]> Acked-by: Johannes Weiner <[email protected]> Cc: Joonsoo Kim <[email protected]> Cc: Michal Hocko <[email protected]> Cc: Minchan Kim <[email protected]> Cc: Rik van Riel <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>