Messages in this thread Patch in this message | | | From | Andi Kleen <> | Subject | [PATCH] [4/4] SLAB: Fix node add timer race in cache_reap | Date | Thu, 11 Feb 2010 21:54:04 +0100 (CET) |
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cache_reap can run before the node is set up and then reference a NULL l3 list. Check for this explicitely and just continue. The node will be eventually set up.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
--- mm/slab.c | 3 +++ 1 file changed, 3 insertions(+)
Index: linux-2.6.32-memhotadd/mm/slab.c =================================================================== --- linux-2.6.32-memhotadd.orig/mm/slab.c +++ linux-2.6.32-memhotadd/mm/slab.c @@ -4093,6 +4093,9 @@ static void cache_reap(struct work_struc * we can do some work if the lock was obtained. */ l3 = searchp->nodelists[node]; + /* Note node yet set up */ + if (!l3) + break; reap_alien(searchp, l3);
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