[PATCH] init_reap_node() initialization fix

From: Daniel Yeisley
Date: Tue Oct 31 2006 - 16:19:32 EST


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@xxxxxxxxxx>
---

diff -Naur linux-2.6.19-rc3-org/mm/slab.c linux-2.6.19-rc3-work/mm/slab.c
--- linux-2.6.19-rc3-org/mm/slab.c 2006-10-23 19:02:02.000000000 -0400
+++ linux-2.6.19-rc3-work/mm/slab.c 2006-10-30 11:45:28.000000000 -0500
@@ -883,7 +883,7 @@
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)




-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/