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Commit 6047a007 authored by Pekka Enberg's avatar Pekka Enberg
Browse files

SLUB: Use ->objsize from struct kmem_cache_cpu in slab_free() 



There's no reason to use ->objsize from struct kmem_cache in slab_free() for
the SLAB_DEBUG_OBJECTS case. All it does is generate extra cache pressure as we
try very hard not to touch struct kmem_cache in the fast-path.

Signed-off-by: default avatarPekka Enberg <penberg@cs.helsinki.fi>
parent a6525042

mm/slub.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -1724,7 +1724,7 @@ static __always_inline void slab_free(struct kmem_cache *s, 
	c = get_cpu_slab(s, smp_processor_id());

	c = get_cpu_slab(s, smp_processor_id());

	debug_check_no_locks_freed(object, c->objsize);

	debug_check_no_locks_freed(object, c->objsize);

	if (!(s->flags & SLAB_DEBUG_OBJECTS))

	if (!(s->flags & SLAB_DEBUG_OBJECTS))

		debug_check_no_obj_freed(object, s->objsize);

		debug_check_no_obj_freed(object, c->objsize);

	if (likely(page == c->page && c->node >= 0)) {

	if (likely(page == c->page && c->node >= 0)) {

		object[c->offset] = c->freelist;

		object[c->offset] = c->freelist;

		c->freelist = object;

		c->freelist = object;