tree 702599b3b616d4bce7415012d8d4d18c7c43e5ec
parent f64ae042d94d376b54e7a343d93c48561e9d2e16
author Shaohua Li <shaohua.li@intel.com> 1321248853 +0800
committer Pekka Enberg <penberg@kernel.org> 1321382460 +0200

slub: move discard_slab out of node lock

Lockdep reports there is potential deadlock for slub node list_lock.
discard_slab() is called with the lock hold in unfreeze_partials(),
which could trigger a slab allocation, which could hold the lock again.

discard_slab() doesn't need hold the lock actually, if the slab is
already removed from partial list.

Acked-by: Christoph Lameter <cl@linux.com>
Reported-and-tested-by: Yong Zhang <yong.zhang0@gmail.com>
Reported-and-tested-by: Julie Sullivan <kernelmail.jms@gmail.com>
Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>