Slab defrag: Move count_partial

Move the counting function before kmem_cache_shrink. We will need to use
it to establish the fragmentation ratio of slabs.

Signed-off-by: Christoph Lameter <clameter@sgi.com>

---
 mm/slub.c |   43 ++++++++++++++++++++++---------------------
 1 file changed, 22 insertions(+), 21 deletions(-)

Index: linux-2.6.23-rc1/mm/slub.c
===================================================================
--- linux-2.6.23-rc1.orig/mm/slub.c	2007-07-29 00:32:55.000000000 -0700
+++ linux-2.6.23-rc1/mm/slub.c	2007-07-29 00:33:16.000000000 -0700
@@ -1298,7 +1298,8 @@ static struct page *get_any_partial(stru
 	 * expensive if we do it every time we are trying to find a slab
 	 * with available objects.
 	 */
-	if (!s->defrag_ratio || get_cycles() % 1024 > s->defrag_ratio)
+	if (!s->remote_node_defrag_ratio ||
+			get_cycles() % 1024 > s->remote_node_defrag_ratio)
 		return NULL;
 
 	zonelist = &NODE_DATA(slab_node(current->mempolicy))
@@ -2091,7 +2092,7 @@ static int kmem_cache_open(struct kmem_c
 
 	s->refcount = 1;
 #ifdef CONFIG_NUMA
-	s->defrag_ratio = 100;
+	s->remote_node_defrag_ratio = 100;
 #endif
 
 	if (init_kmem_cache_nodes(s, gfpflags & ~SLUB_DMA))
@@ -2448,6 +2449,19 @@ void kfree(const void *x)
 }
 EXPORT_SYMBOL(kfree);
 
+static unsigned long count_partial(struct kmem_cache_node *n)
+{
+	unsigned long flags;
+	unsigned long x = 0;
+	struct page *page;
+
+	spin_lock_irqsave(&n->list_lock, flags);
+	list_for_each_entry(page, &n->partial, lru)
+		x += page->inuse;
+	spin_unlock_irqrestore(&n->list_lock, flags);
+	return x;
+}
+
 /*
  * kmem_cache_shrink removes empty slabs from the partial lists and sorts
  * the remaining slabs by the number of items in use. The slabs with the
@@ -3154,19 +3168,6 @@ static int list_locations(struct kmem_ca
 	return n;
 }
 
-static unsigned long count_partial(struct kmem_cache_node *n)
-{
-	unsigned long flags;
-	unsigned long x = 0;
-	struct page *page;
-
-	spin_lock_irqsave(&n->list_lock, flags);
-	list_for_each_entry(page, &n->partial, lru)
-		x += page->inuse;
-	spin_unlock_irqrestore(&n->list_lock, flags);
-	return x;
-}
-
 enum slab_stat_type {
 	SL_FULL,
 	SL_PARTIAL,
@@ -3533,21 +3534,21 @@ static ssize_t free_calls_show(struct km
 SLAB_ATTR_RO(free_calls);
 
 #ifdef CONFIG_NUMA
-static ssize_t defrag_ratio_show(struct kmem_cache *s, char *buf)
+static ssize_t remote_node_defrag_ratio_show(struct kmem_cache *s, char *buf)
 {
-	return sprintf(buf, "%d\n", s->defrag_ratio / 10);
+	return sprintf(buf, "%d\n", s->remote_node_defrag_ratio / 10);
 }
 
-static ssize_t defrag_ratio_store(struct kmem_cache *s,
+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);
 
 	if (n < 100)
-		s->defrag_ratio = n * 10;
+		s->remote_node_defrag_ratio = n * 10;
 	return length;
 }
-SLAB_ATTR(defrag_ratio);
+SLAB_ATTR(remote_node_defrag_ratio);
 #endif
 
 static struct attribute * slab_attrs[] = {
@@ -3578,7 +3579,7 @@ static struct attribute * slab_attrs[] =
 	&cache_dma_attr.attr,
 #endif
 #ifdef CONFIG_NUMA
-	&defrag_ratio_attr.attr,
+	&remote_node_defrag_ratio_attr.attr,
 #endif
 	NULL
 };