Eric Lee / smarc-ti-linux-kernel | Embedian Git Server

Commit 3a7200af3d9227767869f451ed747aff07d8df48

Authored by Mel Gorman 2013-09-12 05:22:19 +0800

Committed by Linus Torvalds 2013-09-12 06:57:55 +0800

mm: compaction: do not compact pgdat for order-0

If kswapd was reclaiming for a high order and resets it to 0 due to
fragmentation it will still call compact_pgdat.  For the most part, this
will fail a compaction_suitable() test and not compact but it is
unnecessarily sloppy.  It could be fixed in the caller but fix it in the
API instead.

[dhillf@gmail.com: pointed out that it was a potential problem]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Hillf Danton <dhillf@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Showing 1 changed file with 3 additions and 0 deletions Side-by-side Diff

mm/compaction.c

mm/compaction.c

Diff comments View file @ 3a7200a

...	...	@@ -1131,6 +1131,9 @@
1131	1131	.sync = false,
1132	1132	};
1133	1133
	1134	+ if (!order)
	1135	+ return;
	1136	+
1134	1137	__compact_pgdat(pgdat, &cc);
1135	1138	}
1136	1139