Commit 7f6b8876 authored Nov 02, 2006 by Daniel Yeisley Committed by Linus Torvalds Nov 03, 2006

[PATCH] init_reap_node() initialization fix



It looks like there is a bug in init_reap_node() in slab.c that can cause
multiple oops's on certain ES7000 configurations.  The variable reap_node
is defined per cpu, but only initialized on a single CPU.  This causes an
oops in next_reap_node() when __get_cpu_var(reap_node) returns the wrong
value.  Fix is below.

Signed-off-by: Dan Yeisley <dan.yeisley@unisys.com>
Cc: Andi Kleen <ak@suse.de>
Acked-by: Christoph Lameter <clameter@engr.sgi.com>
Cc: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Manfred Spraul <manfred@colorfullife.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

parent d13adb60

mm/slab.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -883,7 +883,7 @@ static void init_reap_node(int cpu)
		if (node == MAX_NUMNODES)
		node = first_node(node_online_map);

		__get_cpu_var(reap_node) = node;
		per_cpu(reap_node, cpu) = node;
		}

		static void next_reap_node(void)

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