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| author | Christoph Lameter <cl@linux-foundation.org> | 2008-08-19 08:51:22 -0500 |
|---|---|---|
| committer | Pekka Enberg <penberg@cs.helsinki.fi> | 2008-08-20 21:50:21 +0300 |
| commit | e2cb96b7ecba46888cf00252ffdb8ef1e92c4258 (patch) | |
| tree | 98bb362ab0fc0eab37b206a3b8330354406bb357 | |
| parent | 30a2f3c60a84092c8084dfe788b710f8d0768cd4 (diff) | |
| download | op-kernel-dev-e2cb96b7ecba46888cf00252ffdb8ef1e92c4258.zip op-kernel-dev-e2cb96b7ecba46888cf00252ffdb8ef1e92c4258.tar.gz | |
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.c | 4 |
1 files changed, 2 insertions, 2 deletions
@@ -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; |
