Merge branch 'tracing/kmemtrace' into tracing/kmemtrace2

1 files changed, 9 insertions, 72 deletions

diff --git a/mm/slab.c b/mm/slab.c
index 7f72bb386a09..83075f36df7b 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2132,6 +2132,8 @@ static int __init_refok setup_cpu_cache(struct kmem_cache *cachep)
  *
  * @name must be valid until the cache is destroyed. This implies that
  * the module calling this has to destroy the cache before getting unloaded.
+ * Note that kmem_cache_name() is not guaranteed to return the same pointer,
+ * therefore applications must manage it themselves.
  *
  * The flags are
  *
@@ -2618,7 +2620,7 @@ static struct slab *alloc_slabmgmt(struct kmem_cache *cachep, void *objp,
         if (OFF_SLAB(cachep)) {
                 /* Slab management obj is off-slab. */
                 slabp = kmem_cache_alloc_node(cachep->slabp_cache,
-                                              local_flags & ~GFP_THISNODE, nodeid);
+                                              local_flags, nodeid);
                 if (!slabp)
                         return NULL;
         } else {
@@ -3006,7 +3008,7 @@ retry:
                  * there must be at least one object available for
                  * allocation.
                  */
-                BUG_ON(slabp->inuse < 0 || slabp->inuse >= cachep->num);
+                BUG_ON(slabp->inuse >= cachep->num);
 
                 while (slabp->inuse < cachep->num && batchcount--) {
                         STATS_INC_ALLOCED(cachep);
@@ -3115,79 +3117,14 @@ static void *cache_alloc_debugcheck_after(struct kmem_cache *cachep,
 #define cache_alloc_debugcheck_after(a,b,objp,d) (objp)
 #endif
 
-#ifdef CONFIG_FAILSLAB
-
-static struct failslab_attr {
-
-        struct fault_attr attr;
-
-        u32 ignore_gfp_wait;
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-        struct dentry *ignore_gfp_wait_file;
-#endif
-
-} failslab = {
-        .attr = FAULT_ATTR_INITIALIZER,
-        .ignore_gfp_wait = 1,
-};
-
-static int __init setup_failslab(char *str)
-{
-        return setup_fault_attr(&failslab.attr, str);
-}
-__setup("failslab=", setup_failslab);
-
-static int should_failslab(struct kmem_cache *cachep, gfp_t flags)
+static bool slab_should_failslab(struct kmem_cache *cachep, gfp_t flags)
 {
         if (cachep == &cache_cache)
-                return 0;
-        if (flags & __GFP_NOFAIL)
-                return 0;
-        if (failslab.ignore_gfp_wait && (flags & __GFP_WAIT))
-                return 0;
+                return false;
 
-        return should_fail(&failslab.attr, obj_size(cachep));
+        return should_failslab(obj_size(cachep), flags);
 }
 
-#ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
-
-static int __init failslab_debugfs(void)
-{
-        mode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
-        struct dentry *dir;
-        int err;
-
-        err = init_fault_attr_dentries(&failslab.attr, "failslab");
-        if (err)
-                return err;
-        dir = failslab.attr.dentries.dir;
-
-        failslab.ignore_gfp_wait_file =
-                debugfs_create_bool("ignore-gfp-wait", mode, dir,
-                                      &failslab.ignore_gfp_wait);
-
-        if (!failslab.ignore_gfp_wait_file) {
-                err = -ENOMEM;
-                debugfs_remove(failslab.ignore_gfp_wait_file);
-                cleanup_fault_attr_dentries(&failslab.attr);
-        }
-
-        return err;
-}
-
-late_initcall(failslab_debugfs);
-
-#endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
-
-#else /* CONFIG_FAILSLAB */
-
-static inline int should_failslab(struct kmem_cache *cachep, gfp_t flags)
-{
-        return 0;
-}
-
-#endif /* CONFIG_FAILSLAB */
-
 static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
 {
         void *objp;
@@ -3390,7 +3327,7 @@ __cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid,
         unsigned long save_flags;
         void *ptr;
 
-        if (should_failslab(cachep, flags))
+        if (slab_should_failslab(cachep, flags))
                 return NULL;
 
         cache_alloc_debugcheck_before(cachep, flags);
@@ -3466,7 +3403,7 @@ __cache_alloc(struct kmem_cache *cachep, gfp_t flags, void *caller)
         unsigned long save_flags;
         void *objp;
 
-        if (should_failslab(cachep, flags))
+        if (slab_should_failslab(cachep, flags))
                 return NULL;
 
         cache_alloc_debugcheck_before(cachep, flags);