Commit 442b06bc authored May 17, 2011 by Christoph Lameter Committed by Pekka Enberg May 21, 2011

slub: Remove node check in slab_free



We can set the page pointing in the percpu structure to
NULL to have the same effect as setting c->node to NUMA_NO_NODE.

Gets rid of one check in slab_free() that was only used for
forcing the slab_free to the slowpath for debugging.

We still need to set c->node to NUMA_NO_NODE to force the
slab_alloc() fastpath to the slowpath in case of debugging.

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

parent bd07d87f

mm/slub.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -1881,6 +1881,8 @@ static void __slab_alloc(struct kmem_cache s, gfp_t gfpflags, int node,

		page->inuse++;
		page->freelist = get_freepointer(s, object);
		deactivate_slab(s, c);
		c->page = NULL;
		c->node = NUMA_NO_NODE;
		goto unlock_out;
		}
		@@ -2112,7 +2114,7 @@ static __always_inline void slab_free(struct kmem_cache *s,
		tid = c->tid;
		barrier();

		if (likely(page == c->page && c->node != NUMA_NO_NODE)) {
		if (likely(page == c->page)) {
		set_freepointer(s, object, c->freelist);

		if (unlikely(!this_cpu_cmpxchg_double(