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authorMel Gorman <mgorman@suse.de>2013-09-11 14:22:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-09-11 15:57:55 -0700
commit3a7200af3d9227767869f451ed747aff07d8df48 (patch)
tree3eb938e72d7acaff416cfcd05f96b7cbf6ed9736
parent90c7a79cc45becc6cdb8c026d55ace19e299a02d (diff)
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>
-rw-r--r--mm/compaction.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/compaction.c b/mm/compaction.c
index 05ccb4cc0bdb..c43789388cd8 100644
--- a/mm/compaction.c
+++ b/mm/compaction.c
@@ -1131,6 +1131,9 @@ void compact_pgdat(pg_data_t *pgdat, int order)
.sync = false,
};
+ if (!order)
+ return;
+
__compact_pgdat(pgdat, &cc);
}