From 1c6fe9465941df04a1ad8f009bd6d95b20072a58 Mon Sep 17 00:00:00 2001
From: Magnus Damm <magnus@valinux.co.jp>
Date: Wed, 26 Oct 2005 01:58:59 -0700
Subject: [PATCH] [PATCH] NUMA: broken per cpu pageset counters
The NUMA counters in struct per_cpu_pageset (linux/mmzone.h) are never
cleared today. This works ok for CPU 0 on NUMA machines because
boot_pageset[] is already zero, but for other CPU:s this results in
uninitialized counters.
Signed-off-by: Magnus Damm <magnus@valinux.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
mm/page_alloc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index cc1fe2672a31..e1d3d77f4aee 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1750,6 +1750,8 @@ inline void setup_pageset(struct per_cpu_pageset *p, unsigned long batch)
{
struct per_cpu_pages *pcp;
+ memset(p, 0, sizeof(*p));
+
pcp = &p->pcp[0]; /* hot */
pcp->count = 0;
pcp->low = 2 * batch;
--
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