tree 281c07cf45aabd44962dbceed4efb1a86492115d
parent 2cfb7455d223ab24b23df44be430faf92e12390f
author Christoph Lameter <cl@linux.com> 1306949153 -0500
committer Pekka Enberg <penberg@kernel.org> 1309602415 +0300

slub: Invert locking and avoid slab lock

Locking slabs is no longer necesary if the arch supports cmpxchg operations
and if no debuggin features are used on a slab. If the arch does not support
cmpxchg then we fallback to use the slab lock to do a cmpxchg like operation.

The patch also changes the lock order. Slab locks are subsumed to the node lock
now. With that approach slab_trylocking is no longer necessary.

Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>