linux-kernel - [PATCH 3/5] balancenuma: cleanup in resetting numa scan

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Date:	Sat, 17 Nov 2012 13:17:13 +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 3/5] balancenuma: cleanup in resetting numa scan

Checking ->mm is not needed, but too late if necessary.

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

--- a/kernel/sched/fair.c	Sat Nov 17 12:12:08 2012
+++ b/kernel/sched/fair.c	Sat Nov 17 12:14:26 2012
@@ -1125,7 +1125,7 @@ static void reset_ptenuma_scan(struct ta
 	ACCESS_ONCE(p->mm->numa_scan_seq)++;
 	p->mm->numa_scan_offset = 0;
 	
-	if (p->mm && p->mm->mm_balancenuma)
+	if (p->mm->mm_balancenuma)
 		p->mm->mm_balancenuma->mm_numa_fault_tot >>= 1;
 	if (p->task_balancenuma) {
 		int nid;
--
--
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