linux-kernel - [PATCH 17/25] mm, vmscan: Check if cpusets are enabled during direct reclaim

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Date:	Mon,  8 Jun 2015 14:56:23 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Linux-MM <linux-mm@...ck.org>
Cc:	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	LKML <linux-kernel@...r.kernel.org>, Mel Gorman <mgorman@...e.de>
Subject: [PATCH 17/25] mm, vmscan: Check if cpusets are enabled during direct reclaim

Direct reclaim obeys cpusets but misses the cpusets_enabled() check.
The overhead is unlikely to be measurable in the direct reclaim
path which is expensive but there is no harm is doing it.

Signed-off-by: Mel Gorman <mgorman@...e.de>
---
 mm/vmscan.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/vmscan.c b/mm/vmscan.c
index 140aeefdebe1..e1fbd89ab750 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2522,7 +2522,7 @@ static bool shrink_zones(struct zonelist *zonelist, struct scan_control *sc,
 		 * to global LRU.
 		 */
 		if (global_reclaim(sc)) {
-			if (!cpuset_zone_allowed(zone,
+			if (cpusets_enabled() && !cpuset_zone_allowed(zone,
 						 GFP_KERNEL | __GFP_HARDWALL))
 				continue;
 
-- 
2.3.5

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