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| author | Siddha, Suresh B <suresh.b.siddha@intel.com> | 2007-05-02 19:27:18 +0200 |
|---|---|---|
| committer | Andi Kleen <andi@basil.nowhere.org> | 2007-05-02 19:27:18 +0200 |
| commit | 62918a036148230ba1ad175dc8a0952e3752ac57 (patch) | |
| tree | bc58159f2498c1b29e7a46a3e8f1bb1751a0ab59 /mm | |
| parent | 57a4f91ae5571edd7c0428285d8df16bb8bf5f40 (diff) | |
| download | blackbird-op-linux-62918a036148230ba1ad175dc8a0952e3752ac57.tar.gz blackbird-op-linux-62918a036148230ba1ad175dc8a0952e3752ac57.zip | |
[PATCH] x86-64: skip cache_free_alien() on non NUMA
Set use_alien_caches to 0 on non NUMA platforms. And avoid calling the
cache_free_alien() when use_alien_caches is not set. This will avoid the
cache miss that happens while dereferencing slabp to get nodeid.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Eric Dumazet <dada1@cosmosbay.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <clameter@engr.sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/slab.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/mm/slab.c b/mm/slab.c index 4cbac24ae2f1..168bfe9d8ffe 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -1146,7 +1146,7 @@ static inline int cache_free_alien(struct kmem_cache *cachep, void *objp) * Make sure we are not freeing a object from another node to the array * cache on this cpu. */ - if (likely(slabp->nodeid == node) || unlikely(!use_alien_caches)) + if (likely(slabp->nodeid == node)) return 0; l3 = cachep->nodelists[node]; @@ -1394,6 +1394,9 @@ void __init kmem_cache_init(void) int order; int node; + if (num_possible_nodes() == 1) + use_alien_caches = 0; + for (i = 0; i < NUM_INIT_LISTS; i++) { kmem_list3_init(&initkmem_list3[i]); if (i < MAX_NUMNODES) @@ -3563,7 +3566,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp) check_irq_off(); objp = cache_free_debugcheck(cachep, objp, __builtin_return_address(0)); - if (cache_free_alien(cachep, objp)) + if (use_alien_caches && cache_free_alien(cachep, objp)) return; if (likely(ac->avail < ac->limit)) { |
