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slub: Remove node check in slab_free

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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>
This commit is contained in:
Christoph Lameter 2011-05-17 16:29:31 -05:00 committed by Pekka Enberg
parent bd07d87fd4
commit 442b06bcea
1 changed files with 3 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
mm/slub.c
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@ -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(