path: root/mm/slob.c
diff options
authorChristoph Lameter <>2015-09-04 15:45:34 -0700
committerLinus Torvalds <>2015-09-04 16:54:41 -0700
commit484748f0b65a1950b2b93f444a2287e8dd2cedd6 (patch)
treef7064d3e5cf25ba0a20fed59004797d7001418a5 /mm/slob.c
parent2ae44005b678431a5c7a55dafcd09421ba3fadf0 (diff)
slab: infrastructure for bulk object allocation and freeing
Add the basic infrastructure for alloc/free operations on pointer arrays. It includes a generic function in the common slab code that is used in this infrastructure patch to create the unoptimized functionality for slab bulk operations. Allocators can then provide optimized allocation functions for situations in which large numbers of objects are needed. These optimization may avoid taking locks repeatedly and bypass metadata creation if all objects in slab pages can be used to provide the objects required. Allocators can extend the skeletons provided and add their own code to the bulk alloc and free functions. They can keep the generic allocation and freeing and just fall back to those if optimizations would not work (like for example when debugging is on). Signed-off-by: Christoph Lameter <> Signed-off-by: Jesper Dangaard Brouer <> Cc: Pekka Enberg <> Cc: David Rientjes <> Cc: Joonsoo Kim <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'mm/slob.c')
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/slob.c b/mm/slob.c
index 4765f65019c7..165bbd3cd606 100644
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -611,6 +611,19 @@ void kmem_cache_free(struct kmem_cache *c, void *b)
+void kmem_cache_free_bulk(struct kmem_cache *s, size_t size, void **p)
+ __kmem_cache_free_bulk(s, size, p);
+bool kmem_cache_alloc_bulk(struct kmem_cache *s, gfp_t flags, size_t size,
+ void **p)
+ return __kmem_cache_alloc_bulk(s, flags, size, p);
int __kmem_cache_shutdown(struct kmem_cache *c)
/* No way to check for remaining objects */