Commit 91ca9186 authored Apr 03, 2014 by David Rientjes Committed by Linus Torvalds Apr 03, 2014

mm, compaction: ignore pageblock skip when manually invoking compaction



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 <rientjes@google.com>
Acked-by: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 3115cd91

mm/compaction.c

+1 −0

Original line number	Diff line number	Diff line
		@@ -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);

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