linux-kernel - [PATCH v5 7/8] sched/numa: fix record hinting faults check

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Message-Id: <1386723001-25408-8-git-send-email-liwanp@linux.vnet.ibm.com>
Date:	Wed, 11 Dec 2013 08:50:00 +0800
From:	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Ingo Molnar <mingo@...hat.com>, Rik van Riel <riel@...hat.com>,
	Mel Gorman <mgorman@...e.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>
Subject: [PATCH v5 7/8] sched/numa: fix record hinting faults check

Adjust numa_scan_period in task_numa_placement, depending on how much useful
work the numa code can do. The local faults and remote faults should be used
to check if there is record hinting faults instead of local faults and shared
faults. This patch fix it.

Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Signed-off-by: Wanpeng Li <liwanp@...ux.vnet.ibm.com>
---
 kernel/sched/fair.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index ac5f1e7..f507e12 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -1326,7 +1326,7 @@ static void update_task_scan_period(struct task_struct *p,
 	 * completely idle or all activity is areas that are not of interest
 	 * to automatic numa balancing. Scan slower
 	 */
-	if (local + shared == 0) {
+	if (local + remote == 0) {
 		p->numa_scan_period = min(p->numa_scan_period_max,
 			p->numa_scan_period << 1);
 
-- 
1.7.7.6

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