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| author | Christoph Lameter | 2006-01-19 02:42:37 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2006-01-19 04:20:18 +0100 |
| commit | 86c562a9d6683063e071692fe14e0a18e64ee1be (patch) | |
| tree | dd64f8bff4624f17f2245aeadf962e0d6d5974a0 | |
| parent | [PATCH] NUMA policies in the slab allocator V2 (diff) | |
| download | kernel-qcow2-linux-86c562a9d6683063e071692fe14e0a18e64ee1be.tar.gz kernel-qcow2-linux-86c562a9d6683063e071692fe14e0a18e64ee1be.tar.xz kernel-qcow2-linux-86c562a9d6683063e071692fe14e0a18e64ee1be.zip | |
[PATCH] mm: optimize numa policy handling in slab allocator
Move the interrupt check from slab_node into ___cache_alloc and adds an
"unlikely()" to avoid pipeline stalls on some architectures.
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | mm/mempolicy.c | 3 | ||||
| -rw-r--r-- | mm/slab.c | 2 |
2 files changed, 1 insertions, 4 deletions
diff --git a/mm/mempolicy.c b/mm/mempolicy.c index 71430d440822..73790188b0eb 100644 --- a/mm/mempolicy.c +++ b/mm/mempolicy.c @@ -982,9 +982,6 @@ static unsigned interleave_nodes(struct mempolicy *policy) */ unsigned slab_node(struct mempolicy *policy) { - if (in_interrupt()) - return numa_node_id(); - switch (policy->policy) { case MPOL_INTERLEAVE: return interleave_nodes(policy); diff --git a/mm/slab.c b/mm/slab.c index 9025608696ec..6f8495e2185b 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2574,7 +2574,7 @@ static inline void *____cache_alloc(kmem_cache_t *cachep, gfp_t flags) struct array_cache *ac; #ifdef CONFIG_NUMA - if (current->mempolicy) { + if (unlikely(current->mempolicy && !in_interrupt())) { int nid = slab_node(current->mempolicy); if (nid != numa_node_id()) |