We need the defrag ratio for the non NUMA situation now. The NUMA defrag works
by allocating objects from partial slabs on remote nodes. Rename it to
remote_node_defrag_ratio
to be clear about this.
Signed-off-by: Christoph Lameter <[EMAIL PROTECTED]>
---
include/linux/slub_def.h | 5 ++++-
mm/slub.c | 17 +++++++++--------
2 files changed, 13 insertions(+), 9 deletions(-)
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index 8aad7dc..5912b58 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -59,7 +59,10 @@ struct kmem_cache {
#endif
#ifdef CONFIG_NUMA
- int defrag_ratio;
+ /*
+ * Defragmentation by allocating from a remote node.
+ */
+ int remote_node_defrag_ratio;
struct kmem_cache_node *node[MAX_NUMNODES];
#endif
#ifdef CONFIG_SMP
diff --git a/mm/slub.c b/mm/slub.c
index aad6f83..e63aba5 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1267,7 +1267,8 @@ static struct page *get_any_partial(struct kmem_cache *s,
gfp_t flags)
* 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))
@@ -2200,7 +2201,7 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t
gfpflags,
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))
@@ -3717,21 +3718,21 @@ static ssize_t free_calls_show(struct kmem_cache *s,
char *buf)
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[] = {
@@ -3762,7 +3763,7 @@ 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
};
--
1.5.2.4
--
-
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