diff options
| author | Mel Gorman <mel@csn.ul.ie> | 2009-06-16 15:32:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:35 -0700 |
| commit | b6e68bc1baed9b6972a250aba66b8c5276cf6fb1 (patch) | |
| tree | 193af67b8333417347b9324e4bf9963d7cf0a872 /mm/slab.c | |
| parent | 62bc62a873116805774ffd37d7f86aa4faa832b1 (diff) | |
| download | linux-b6e68bc1baed9b6972a250aba66b8c5276cf6fb1.tar.bz2 | |
page allocator: slab: use nr_online_nodes to check for a NUMA platform
SLAB currently avoids checking a bitmap repeatedly by checking once and
storing a flag. When the addition of nr_online_nodes as a cheaper version
of num_online_nodes(), this check can be replaced by nr_online_nodes.
(Christoph did a patch that this is lifted almost verbatim from)
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Mel Gorman <mel@csn.ul.ie>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Reviewed-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Nick Piggin <nickpiggin@yahoo.com.au>
Cc: Dave Hansen <dave@linux.vnet.ibm.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/slab.c')
| -rw-r--r-- | mm/slab.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/slab.c b/mm/slab.c index bb3254c95cd2..744ab9a665a2 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -898,7 +898,6 @@ static void __slab_error(const char *function, struct kmem_cache *cachep, */ static int use_alien_caches __read_mostly = 1; -static int numa_platform __read_mostly = 1; static int __init noaliencache_setup(char *s) { use_alien_caches = 0; @@ -1457,10 +1456,8 @@ void __init kmem_cache_init(void) int order; int node; - if (num_possible_nodes() == 1) { + if (num_possible_nodes() == 1) use_alien_caches = 0; - numa_platform = 0; - } for (i = 0; i < NUM_INIT_LISTS; i++) { kmem_list3_init(&initkmem_list3[i]); @@ -3590,7 +3587,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp) * variable to skip the call, which is mostly likely to be present in * the cache. */ - if (numa_platform && cache_free_alien(cachep, objp)) + if (nr_online_nodes > 1 && cache_free_alien(cachep, objp)) return; if (likely(ac->avail < ac->limit)) { |