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mm, compaction: ignore pageblock skip when manually invoking compaction

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The cached pageblock hint should be ignored when triggering compaction
through /proc/sys/vm/compact_memory so all eligible memory is isolated.
Manually invoking compaction is known to be expensive, there's no need
to skip pageblocks based on heuristics (mainly for debugging).

Signed-off-by: David Rientjes <[email protected]>
Acked-by: Mel Gorman <[email protected]>
Cc: Rik van Riel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
David Rientjes 2014-04-03 14:47:23 -07:00 • committed by Linus Torvalds
commit 91ca918648
1 changed files with 1 additions and 0 deletions
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mm/compaction.c
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@ -1186,6 +1186,7 @@ static void compact_node(int nid)
struct compact_control cc = {
.order = -1,
.sync = true,
.ignore_skip_hint = true,
};
__compact_pgdat(NODE_DATA(nid), &cc);