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authorJoonsoo Kim <iamjoonsoo.kim@lge.com>2016-03-15 14:54:47 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-15 16:55:16 -0700
commit10b2e9e8e808bd30e1f4018a36366d07b0abd12f (patch)
tree9895c7970794dcab2fd2c76123df0f2c84925c71 /mm/slab.c
parentd8410234db6a1bb05408ba2f0e3fd6b04ef626a3 (diff)
mm/slab: factor out debugging initialization in cache_init_objs()
cache_init_objs() will be changed in following patch and current form doesn't fit well for that change. So, before doing it, this patch separates debugging initialization. This would cause two loop iteration when debugging is enabled, but, this overhead seems too light than debug feature itself so effect may not be visible. This patch will greatly simplify changes in cache_init_objs() in following patch. Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab.c')
-rw-r--r--mm/slab.c24
1 files changed, 18 insertions, 6 deletions
diff --git a/mm/slab.c b/mm/slab.c
index 95e5d6356d86..d3608d15fbe4 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2460,14 +2460,14 @@ static inline void set_free_obj(struct page *page,
((freelist_idx_t *)(page->freelist))[idx] = val;
}
-static void cache_init_objs(struct kmem_cache *cachep,
- struct page *page)
+static void cache_init_objs_debug(struct kmem_cache *cachep, struct page *page)
{
+#if DEBUG
int i;
for (i = 0; i < cachep->num; i++) {
void *objp = index_to_obj(cachep, page, i);
-#if DEBUG
+
if (cachep->flags & SLAB_STORE_USER)
*dbg_userword(cachep, objp) = NULL;
@@ -2496,10 +2496,22 @@ static void cache_init_objs(struct kmem_cache *cachep,
poison_obj(cachep, objp, POISON_FREE);
slab_kernel_map(cachep, objp, 0, 0);
}
-#else
- if (cachep->ctor)
- cachep->ctor(objp);
+ }
#endif
+}
+
+static void cache_init_objs(struct kmem_cache *cachep,
+ struct page *page)
+{
+ int i;
+
+ cache_init_objs_debug(cachep, page);
+
+ for (i = 0; i < cachep->num; i++) {
+ /* constructor could break poison info */
+ if (DEBUG == 0 && cachep->ctor)
+ cachep->ctor(index_to_obj(cachep, page, i));
+
set_free_obj(page, i, i);
}
}