linux-kernel - [PATCH 4/5] balancenuma: check mem node in finding placement

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Message-ID: <CAJd=RBCGTiU9wwKCfH1wwcLLtxEB1AW4DUfRjJiRD8WaJiG4wg@mail.gmail.com>
Date:	Sat, 17 Nov 2012 13:19:53 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	Mel Gorman <mgorman@...e.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: [PATCH 4/5] balancenuma: check mem node in finding placement

No point to migrate task from node A to node A.

Signed-off-by: Hillf Danton <dhillf@...il.com>
---

--- a/kernel/sched/fair.c	Sat Nov 17 12:25:44 2012
+++ b/kernel/sched/fair.c	Sat Nov 17 12:25:54 2012
@@ -891,6 +891,8 @@ static void task_numa_find_placement(str
 	/* Examine a task on every other node */
 	for_each_online_node(nid) {
 		int cpu;
+		if (nid == this_nid)
+			continue;
 		for_each_cpu_and(cpu, cpumask_of_node(nid), allowed) {
 			struct rq *rq;
 			struct mm_struct *other_mm;
--
--
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