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authorJesper Dangaard Brouer <brouer@redhat.com>2016-03-15 14:53:38 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-15 16:55:16 -0700
commitfab9963a69dbd71304357dbfe4ec5345f14cebdd (patch)
tree369f7f82b5f17d426ccaddc4295d6568f7647068 /mm
parent11c7aec2a9b4e685bbf6a15148e7841b3525fc0c (diff)
mm: fault-inject take over bootstrap kmem_cache check
Remove the SLAB specific function slab_should_failslab(), by moving the check against fault-injection for the bootstrap slab, into the shared function should_failslab() (used by both SLAB and SLUB). This is a step towards sharing alloc_hook's between SLUB and SLAB. This bootstrap slab "kmem_cache" is used for allocating struct kmem_cache objects to the allocator itself. Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.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: Vladimir Davydov <vdavydov@virtuozzo.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/failslab.c12
-rw-r--r--mm/slab.c12
-rw-r--r--mm/slab.h2
3 files changed, 12 insertions, 14 deletions
diff --git a/mm/failslab.c b/mm/failslab.c
index 79171b4a5826..b0fac98cd938 100644
--- a/mm/failslab.c
+++ b/mm/failslab.c
@@ -1,5 +1,7 @@
#include <linux/fault-inject.h>
#include <linux/slab.h>
+#include <linux/mm.h>
+#include "slab.h"
static struct {
struct fault_attr attr;
@@ -11,18 +13,22 @@ static struct {
.cache_filter = false,
};
-bool should_failslab(size_t size, gfp_t gfpflags, unsigned long cache_flags)
+bool should_failslab(struct kmem_cache *s, gfp_t gfpflags)
{
+ /* No fault-injection for bootstrap cache */
+ if (unlikely(s == kmem_cache))
+ return false;
+
if (gfpflags & __GFP_NOFAIL)
return false;
if (failslab.ignore_gfp_reclaim && (gfpflags & __GFP_RECLAIM))
return false;
- if (failslab.cache_filter && !(cache_flags & SLAB_FAILSLAB))
+ if (failslab.cache_filter && !(s->flags & SLAB_FAILSLAB))
return false;
- return should_fail(&failslab.attr, size);
+ return should_fail(&failslab.attr, s->object_size);
}
static int __init setup_failslab(char *str)
diff --git a/mm/slab.c b/mm/slab.c
index 621fbcb35a36..95f344d79453 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2926,14 +2926,6 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
#define cache_alloc_debugcheck_after(a,b,objp,d) (objp)
#endif
-static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
-{
- if (unlikely(cachep == kmem_cache))
- return false;
-
- return should_failslab(cachep->object_size, flags, cachep->flags);
-}
-
static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
{
void *objp;
@@ -3155,7 +3147,7 @@ slab_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
lockdep_trace_alloc(flags);
- if (slab_should_failslab(cachep, flags))
+ if (should_failslab(cachep, flags))
return NULL;
cachep = memcg_kmem_get_cache(cachep, flags);
@@ -3243,7 +3235,7 @@ slab_alloc(struct kmem_cache *cachep, gfp_t flags, unsigned long caller)
lockdep_trace_alloc(flags);
- if (slab_should_failslab(cachep, flags))
+ if (should_failslab(cachep, flags))
return NULL;
cachep = memcg_kmem_get_cache(cachep, flags);
diff --git a/mm/slab.h b/mm/slab.h
index fd231c9f5f93..6c7f16a44386 100644
--- a/mm/slab.h
+++ b/mm/slab.h
@@ -360,7 +360,7 @@ static inline struct kmem_cache *slab_pre_alloc_hook(struct kmem_cache *s,
lockdep_trace_alloc(flags);
might_sleep_if(gfpflags_allow_blocking(flags));
- if (should_failslab(s->object_size, flags, s->flags))
+ if (should_failslab(s, flags))
return NULL;
return memcg_kmem_get_cache(s, flags);