Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg...

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6:
  SLUB: dynamic per-cache MIN_PARTIAL
  mm: unexport ksize

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 5bad61a..2f5c16b 100644 (file)
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -46,6 +46,7 @@ struct kmem_cache_cpu {
 struct kmem_cache_node {
        spinlock_t list_lock;   /* Protect partial list and nr_partial */
        unsigned long nr_partial;
+       unsigned long min_partial;
        struct list_head partial;
 #ifdef CONFIG_SLUB_DEBUG
        atomic_long_t nr_slabs;

diff --git a/mm/slab.c b/mm/slab.c
index 918f04f..e76eee4 100644 (file)
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -4472,4 +4472,3 @@ size_t ksize(const void *objp)
 
        return obj_size(virt_to_cache(objp));
 }
-EXPORT_SYMBOL(ksize);

diff --git a/mm/slob.c b/mm/slob.c
index d8fbd4d..4c82dd4 100644 (file)
--- a/mm/slob.c
+++ b/mm/slob.c
@@ -519,7 +519,6 @@ size_t ksize(const void *block)
        else
                return sp->page.private;
 }
-EXPORT_SYMBOL(ksize);
 
 struct kmem_cache {
        unsigned int size, align;

diff --git a/mm/slub.c b/mm/slub.c
index b7e2cd5..4f5b961 100644 (file)
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1329,7 +1329,7 @@ static struct page *get_any_partial(struct kmem_cache *s, gfp_t flags)
                n = get_node(s, zone_to_nid(zone));
 
                if (n && cpuset_zone_allowed_hardwall(zone, flags) &&
-                               n->nr_partial > MIN_PARTIAL) {
+                               n->nr_partial > n->min_partial) {
                        page = get_partial_node(n);
                        if (page)
                                return page;
@@ -1381,7 +1381,7 @@ static void unfreeze_slab(struct kmem_cache *s, struct page *page, int tail)
                slab_unlock(page);
        } else {
                stat(c, DEACTIVATE_EMPTY);
-               if (n->nr_partial < MIN_PARTIAL) {
+               if (n->nr_partial < n->min_partial) {
                        /*
                         * Adding an empty slab to the partial slabs in order
                         * to avoid page allocator overhead. This slab needs
@@ -1913,9 +1913,21 @@ static void init_kmem_cache_cpu(struct kmem_cache *s,
 #endif
 }
 
-static void init_kmem_cache_node(struct kmem_cache_node *n)
+static void
+init_kmem_cache_node(struct kmem_cache_node *n, struct kmem_cache *s)
 {
        n->nr_partial = 0;
+
+       /*
+        * The larger the object size is, the more pages we want on the partial
+        * list to avoid pounding the page allocator excessively.
+        */
+       n->min_partial = ilog2(s->size);
+       if (n->min_partial < MIN_PARTIAL)
+               n->min_partial = MIN_PARTIAL;
+       else if (n->min_partial > MAX_PARTIAL)
+               n->min_partial = MAX_PARTIAL;
+
        spin_lock_init(&n->list_lock);
        INIT_LIST_HEAD(&n->partial);
 #ifdef CONFIG_SLUB_DEBUG
@@ -2087,7 +2099,7 @@ static struct kmem_cache_node *early_kmem_cache_node_alloc(gfp_t gfpflags,
        init_object(kmalloc_caches, n, 1);
        init_tracking(kmalloc_caches, n);
 #endif
-       init_kmem_cache_node(n);
+       init_kmem_cache_node(n, kmalloc_caches);
        inc_slabs_node(kmalloc_caches, node, page->objects);
 
        /*
@@ -2144,7 +2156,7 @@ static int init_kmem_cache_nodes(struct kmem_cache *s, gfp_t gfpflags)
 
                }
                s->node[node] = n;
-               init_kmem_cache_node(n);
+               init_kmem_cache_node(n, s);
        }
        return 1;
 }
@@ -2155,7 +2167,7 @@ static void free_kmem_cache_nodes(struct kmem_cache *s)
 
 static int init_kmem_cache_nodes(struct kmem_cache *s, gfp_t gfpflags)
 {
-       init_kmem_cache_node(&s->local_node);
+       init_kmem_cache_node(&s->local_node, s);
        return 1;
 }
 #endif
@@ -2715,7 +2727,6 @@ size_t ksize(const void *object)
         */
        return s->size;
 }
-EXPORT_SYMBOL(ksize);
 
 void kfree(const void *x)
 {
@@ -2890,7 +2901,7 @@ static int slab_mem_going_online_callback(void *arg)
                        ret = -ENOMEM;
                        goto out;
                }
-               init_kmem_cache_node(n);
+               init_kmem_cache_node(n, s);
                s->node[nid] = n;
        }
 out: