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authorChristoph Lameter <clameter@sgi.com>2008-04-23 12:36:52 -0700
committerPekka Enberg <penberg@cs.helsinki.fi>2008-04-27 18:26:18 +0300
commit599870b175987008b5f5c82a70b89f751e12822e (patch)
treeba01b18de3d30978bc0e7fb05af278710eec9d39
parentd629d819579327267884a12de21ef6d4b539db88 (diff)
slub: free_list() cleanup
free_list looked a bit screwy so here is an attempt to clean it up. free_list is is only used for freeing partial lists. We do not need to return a parameter if we decrement nr_partial within the function which allows a simplification of the whole thing. The current version modifies nr_partial outside of the list_lock which is technically not correct. It was only ok because we should be the only user of this slab cache at this point. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
-rw-r--r--mm/slub.c18
1 files changed, 7 insertions, 11 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 378d3f1b548..c937233127e 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2372,25 +2372,21 @@ const char *kmem_cache_name(struct kmem_cache *s)
EXPORT_SYMBOL(kmem_cache_name);
/*
- * Attempt to free all slabs on a node. Return the number of slabs we
- * were unable to free.
+ * Attempt to free all partial slabs on a node.
*/
-static int free_list(struct kmem_cache *s, struct kmem_cache_node *n,
- struct list_head *list)
+static void free_partial(struct kmem_cache *s, struct kmem_cache_node *n)
{
- int slabs_inuse = 0;
unsigned long flags;
struct page *page, *h;
spin_lock_irqsave(&n->list_lock, flags);
- list_for_each_entry_safe(page, h, list, lru)
+ list_for_each_entry_safe(page, h, &n->partial, lru)
if (!page->inuse) {
list_del(&page->lru);
discard_slab(s, page);
- } else
- slabs_inuse++;
+ n->nr_partial--;
+ }
spin_unlock_irqrestore(&n->list_lock, flags);
- return slabs_inuse;
}
/*
@@ -2407,8 +2403,8 @@ static inline int kmem_cache_close(struct kmem_cache *s)
for_each_node_state(node, N_NORMAL_MEMORY) {
struct kmem_cache_node *n = get_node(s, node);
- n->nr_partial -= free_list(s, n, &n->partial);
- if (slabs_node(s, node))
+ free_partial(s, n);
+ if (n->nr_partial || slabs_node(s, node))
return 1;
}
free_kmem_cache_nodes(s);