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Subject[patch 02/23] SLUB: Rename NUMA defrag_ratio to remote_node_defrag_ratio
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.

[This patch is already in mm]

Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Christoph Lameter <clameter@sgi.com>
---
include/linux/slub_def.h | 5 ++++-
mm/slub.c | 17 +++++++++--------
2 files changed, 13 insertions(+), 9 deletions(-)
Index: linux-2.6/include/linux/slub_def.h
===================================================================
--- linux-2.6.orig/include/linux/slub_def.h 2007-11-06 12:34:13.000000000 -0800
+++ linux-2.6/include/linux/slub_def.h 2007-11-06 12:36:28.000000000 -0800
@@ -60,7 +60,10 @@ 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
Index: linux-2.6/mm/slub.c
===================================================================
--- linux-2.6.orig/mm/slub.c 2007-11-06 12:36:16.000000000 -0800
+++ linux-2.6/mm/slub.c 2007-11-06 12:37:25.000000000 -0800
@@ -1345,7 +1345,8 @@ static unsigned long get_any_partial(str
* 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 0;

zonelist = &NODE_DATA(slab_node(current->mempolicy))
@@ -2363,7 +2364,7 @@ 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))
goto error;
@@ -4005,21 +4006,21 @@ 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[] = {
@@ -4050,7 +4051,7 @@ 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
};
--
-
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