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| author | Suleiman Souhlal | 2011-06-02 09:16:42 +0200 |
|---|---|---|
| committer | Pekka Enberg | 2011-06-03 18:33:50 +0200 |
| commit | a947eb95ea03199da7408a64baa97fbb613e9b84 (patch) | |
| tree | f3a6c46b2c1b19a332a009d0e5ddb7512e21a40f /mm/slab.c | |
| parent | slub: always align cpu_slab to honor cmpxchg_double requirement (diff) | |
| download | kernel-qcow2-linux-a947eb95ea03199da7408a64baa97fbb613e9b84.tar.gz kernel-qcow2-linux-a947eb95ea03199da7408a64baa97fbb613e9b84.tar.xz kernel-qcow2-linux-a947eb95ea03199da7408a64baa97fbb613e9b84.zip | |
SLAB: Record actual last user of freed objects.
Currently, when using CONFIG_DEBUG_SLAB, we put in kfree() or
kmem_cache_free() as the last user of free objects, which is not
very useful, so change it to the caller of those functions instead.
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Suleiman Souhlal <suleiman@google.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/mm/slab.c b/mm/slab.c index bcfa4987c8ae..d96e223de775 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -3604,13 +3604,14 @@ free_done: * Release an obj back to its cache. If the obj has a constructed state, it must * be in this state _before_ it is released. Called with disabled ints. */ -static inline void __cache_free(struct kmem_cache *cachep, void *objp) +static inline void __cache_free(struct kmem_cache *cachep, void *objp, + void *caller) { struct array_cache *ac = cpu_cache_get(cachep); check_irq_off(); kmemleak_free_recursive(objp, cachep->flags); - objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0)); + objp = cache_free_debugcheck(cachep, objp, caller); kmemcheck_slab_free(cachep, objp, obj_size(cachep)); @@ -3801,7 +3802,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp) debug_check_no_locks_freed(objp, obj_size(cachep)); if (!(cachep->flags & SLAB_DEBUG_OBJECTS)) debug_check_no_obj_freed(objp, obj_size(cachep)); - __cache_free(cachep, objp); + __cache_free(cachep, objp, __builtin_return_address(0)); local_irq_restore(flags); trace_kmem_cache_free(_RET_IP_, objp); @@ -3831,7 +3832,7 @@ void kfree(const void *objp) c = virt_to_cache(objp); debug_check_no_locks_freed(objp, obj_size(c)); debug_check_no_obj_freed(objp, obj_size(c)); - __cache_free(c, (void *)objp); + __cache_free(c, (void *)objp, __builtin_return_address(0)); local_irq_restore(flags); } EXPORT_SYMBOL(kfree); |