3 files changed, 34 insertions, 22 deletions

diff --git a/Documentation/vm/slabinfo.c b/Documentation/vm/slabinfo.c
index d3ce295bffac..e4230ed16ee7 100644
--- a/Documentation/vm/slabinfo.c
+++ b/Documentation/vm/slabinfo.c
@@ -38,7 +38,7 @@ struct slabinfo {
         unsigned long alloc_from_partial, alloc_slab, free_slab, alloc_refill;
         unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
         unsigned long deactivate_to_head, deactivate_to_tail;
-        unsigned long deactivate_remote_frees;
+        unsigned long deactivate_remote_frees, order_fallback;
         int numa[MAX_NODES];
         int numa_partial[MAX_NODES];
 } slabinfo[MAX_SLABS];
@@ -293,7 +293,7 @@ int line = 0;
 void first_line(void)
 {
         if (show_activity)
-                printf("Name                   Objects    Alloc     Free   %%Fast\n");
+                printf("Name                   Objects      Alloc       Free   %%Fast Fallb O\n");
         else
                 printf("Name                   Objects Objsize    Space "
                         "Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
@@ -573,11 +573,12 @@ void slabcache(struct slabinfo *s)
                 total_alloc = s->alloc_fastpath + s->alloc_slowpath;
                 total_free = s->free_fastpath + s->free_slowpath;
 
-                printf("%-21s %8ld %8ld %8ld %3ld %3ld \n",
+                printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
                         s->name, s->objects,
                         total_alloc, total_free,
                         total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
-                        total_free ? (s->free_fastpath * 100 / total_free) : 0);
+                        total_free ? (s->free_fastpath * 100 / total_free) : 0,
+                        s->order_fallback, s->order);
         }
         else
                 printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
@@ -1188,6 +1189,7 @@ void read_slab_dir(void)
                         slab->deactivate_to_head = get_obj("deactivate_to_head");
                         slab->deactivate_to_tail = get_obj("deactivate_to_tail");
                         slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
+                        slab->order_fallback = get_obj("order_fallback");
                         chdir("..");
                         if (slab->name[0] == ':')
                                 alias_targets++;
diff --git a/init/Kconfig b/init/Kconfig
index 3e7b257fc05f..6a44defac3ec 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -720,7 +720,7 @@ config VM_EVENT_COUNTERS
 config SLUB_DEBUG
         default y
         bool "Enable SLUB debugging support" if EMBEDDED
-        depends on SLUB
+        depends on SLUB && SYSFS
         help
           SLUB has extensive debug support features. Disabling these can
           result in significant savings in code size. This also disables
diff --git a/mm/slub.c b/mm/slub.c
index 32b62623846a..d379b782fc83 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -217,7 +217,7 @@ struct track {
 
 enum track_item { TRACK_ALLOC, TRACK_FREE };
 
-#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
+#ifdef CONFIG_SLUB_DEBUG
 static int sysfs_slab_add(struct kmem_cache *);
 static int sysfs_slab_alias(struct kmem_cache *, const char *);
 static void sysfs_slab_remove(struct kmem_cache *);
@@ -814,7 +814,8 @@ static int on_freelist(struct kmem_cache *s, struct page *page, void *search)
         return search == NULL;
 }
 
-static void trace(struct kmem_cache *s, struct page *page, void *object, int alloc)
+static void trace(struct kmem_cache *s, struct page *page, void *object,
+                                                                int alloc)
 {
         if (s->flags & SLAB_TRACE) {
                 printk(KERN_INFO "TRACE %s %s 0x%p inuse=%d fp=0x%p\n",
@@ -1267,8 +1268,7 @@ static void add_partial(struct kmem_cache_node *n,
         spin_unlock(&n->list_lock);
 }
 
-static void remove_partial(struct kmem_cache *s,
-                                                struct page *page)
+static void remove_partial(struct kmem_cache *s, struct page *page)
 {
         struct kmem_cache_node *n = get_node(s, page_to_nid(page));
 
@@ -1283,7 +1283,8 @@ static void remove_partial(struct kmem_cache *s,
  *
  * Must hold list_lock.
  */
-static inline int lock_and_freeze_slab(struct kmem_cache_node *n, struct page *page)
+static inline int lock_and_freeze_slab(struct kmem_cache_node *n,
+                                                        struct page *page)
 {
         if (slab_trylock(page)) {
                 list_del(&page->lru);
@@ -1420,8 +1421,8 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
                          * so that the others get filled first. That way the
                          * size of the partial list stays small.
                          *
-                         * kmem_cache_shrink can reclaim any empty slabs from the
-                         * partial list.
+                         * kmem_cache_shrink can reclaim any empty slabs from
+                         * the partial list.
                          */
                         add_partial(n, page, 1);
                         slab_unlock(page);
@@ -2909,7 +2910,7 @@ static int slab_mem_going_online_callback(void *arg)
                 return 0;
 
         /*
-         * We are bringing a node online. No memory is availabe yet. We must
+         * We are bringing a node online. No memory is available yet. We must
          * allocate a kmem_cache_node structure in order to bring the node
          * online.
          */
@@ -3246,7 +3247,7 @@ void *__kmalloc_node_track_caller(size_t size, gfp_t gfpflags,
         return slab_alloc(s, gfpflags, node, caller);
 }
 
-#if (defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)) || defined(CONFIG_SLABINFO)
+#ifdef CONFIG_SLUB_DEBUG
 static unsigned long count_partial(struct kmem_cache_node *n,
                                         int (*get_count)(struct page *))
 {
@@ -3275,9 +3276,7 @@ static int count_free(struct page *page)
 {
         return page->objects - page->inuse;
 }
-#endif
 
-#if defined(CONFIG_SYSFS) && defined(CONFIG_SLUB_DEBUG)
 static int validate_slab(struct kmem_cache *s, struct page *page,
                                                 unsigned long *map)
 {
@@ -3812,7 +3811,12 @@ SLAB_ATTR_RO(objs_per_slab);
 static ssize_t order_store(struct kmem_cache *s,
                                 const char *buf, size_t length)
 {
-        int order = simple_strtoul(buf, NULL, 10);
+        unsigned long order;
+        int err;
+
+        err = strict_strtoul(buf, 10, &order);
+        if (err)
+                return err;
 
         if (order > slub_max_order || order < slub_min_order)
                 return -EINVAL;
@@ -4065,10 +4069,16 @@ static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
 static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s,
                                 const char *buf, size_t length)
 {
-        int n = simple_strtoul(buf, NULL, 10);
+        unsigned long ratio;
+        int err;
+
+        err = strict_strtoul(buf, 10, &ratio);
+        if (err)
+                return err;
+
+        if (ratio < 100)
+                s->remote_node_defrag_ratio = ratio * 10;
 
-        if (n < 100)
-                s->remote_node_defrag_ratio = n * 10;
         return length;
 }
 SLAB_ATTR(remote_node_defrag_ratio);
@@ -4425,8 +4435,8 @@ __initcall(slab_sysfs_init);
  */
 #ifdef CONFIG_SLABINFO
 
-ssize_t slabinfo_write(struct file *file, const char __user * buffer,
-                       size_t count, loff_t *ppos)
+ssize_t slabinfo_write(struct file *file, const char __user *buffer,
+                       size_t count, loff_t *ppos)
 {
         return -EINVAL;
 }