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Diffstat (limited to 'mm/slub.c')
-rw-r--r--mm/slub.c26
1 files changed, 13 insertions, 13 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 9f662d70eb47..30c4558acc8b 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2970,13 +2970,13 @@ static void list_slab_objects(struct kmem_cache *s, struct page *page,
/*
* Attempt to free all partial slabs on a node.
+ * This is called from kmem_cache_close(). We must be the last thread
+ * using the cache and therefore we do not need to lock anymore.
*/
static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n)
{
- unsigned long flags;
struct page *page, *h;
- spin_lock_irqsave(&n->list_lock, flags);
list_for_each_entry_safe(page, h, &n->partial, lru) {
if (!page->inuse) {
remove_partial(n, page);
@@ -2986,7 +2986,6 @@ static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n)
"Objects remaining on kmem_cache_close()");
}
}
- spin_unlock_irqrestore(&n->list_lock, flags);
}
/*
@@ -3020,6 +3019,7 @@ void kmem_cache_destroy(struct kmem_cache *s)
s->refcount--;
if (!s->refcount) {
list_del(&s->list);
+ up_write(&slub_lock);
if (kmem_cache_close(s)) {
printk(KERN_ERR "SLUB %s: %s called for cache that "
"still has objects.\n", s->name, __func__);
@@ -3028,8 +3028,8 @@ void kmem_cache_destroy(struct kmem_cache *s)
if (s->flags & SLAB_DESTROY_BY_RCU)
rcu_barrier();
sysfs_slab_remove(s);
- }
- up_write(&slub_lock);
+ } else
+ up_write(&slub_lock);
}
EXPORT_SYMBOL(kmem_cache_destroy);
@@ -3347,23 +3347,23 @@ int kmem_cache_shrink(struct kmem_cache *s)
* list_lock. page->inuse here is the upper limit.
*/
list_for_each_entry_safe(page, t, &n->partial, lru) {
- if (!page->inuse) {
- remove_partial(n, page);
- discard_slab(s, page);
- } else {
- list_move(&page->lru,
- slabs_by_inuse + page->inuse);
- }
+ list_move(&page->lru, slabs_by_inuse + page->inuse);
+ if (!page->inuse)
+ n->nr_partial--;
}
/*
* Rebuild the partial list with the slabs filled up most
* first and the least used slabs at the end.
*/
- for (i = objects - 1; i >= 0; i--)
+ for (i = objects - 1; i > 0; i--)
list_splice(slabs_by_inuse + i, n->partial.prev);
spin_unlock_irqrestore(&n->list_lock, flags);
+
+ /* Release empty slabs */
+ list_for_each_entry_safe(page, t, slabs_by_inuse, lru)
+ discard_slab(s, page);
}
kfree(slabs_by_inuse);