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authorChristoph Lameter <cl@linux-foundation.org>2008-08-19 08:51:22 -0500
committerPekka Enberg <penberg@cs.helsinki.fi>2008-08-20 21:50:21 +0300
commite2cb96b7ecba46888cf00252ffdb8ef1e92c4258 (patch)
tree98bb362ab0fc0eab37b206a3b8330354406bb357
parent30a2f3c60a84092c8084dfe788b710f8d0768cd4 (diff)
slub: Disable NUMA remote node defragmentation by default
Switch remote node defragmentation off by default. The current settings can cause excessive node local allocations with hackbench: SLAB: % cat /proc/meminfo MemTotal: 7701760 kB MemFree: 5940096 kB Slab: 123840 kB SLUB: % cat /proc/meminfo MemTotal: 7701376 kB MemFree: 4740928 kB Slab: 1591680 kB [Note: this feature is not related to slab defragmentation.] You can find the original discussion here: http://lkml.org/lkml/2008/8/4/308 Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Tested-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
-rw-r--r--mm/slub.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 4f5b9614945..fb486d5540f 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -2312,7 +2312,7 @@ static int kmem_cache_open(struct kmem_cache *s, gfp_t gfpflags,
s->refcount = 1;
#ifdef CONFIG_NUMA
- s->remote_node_defrag_ratio = 100;
+ s->remote_node_defrag_ratio = 1000;
#endif
if (!init_kmem_cache_nodes(s, gfpflags & ~SLUB_DMA))
goto error;
@@ -4058,7 +4058,7 @@ static ssize_t remote_node_defrag_ratio_store(struct kmem_cache *s,
if (err)
return err;
- if (ratio < 100)
+ if (ratio <= 100)
s->remote_node_defrag_ratio = ratio * 10;
return length;