Commit 62918a03 authored by Siddha, Suresh B's avatar Siddha, Suresh B Committed by Andi Kleen
Browse files

[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: default avatarSuresh Siddha <>
Signed-off-by: default avatarAndi Kleen <>
Cc: Andi Kleen <>
Cc: Eric Dumazet <>
Cc: David Rientjes <>
Cc: Christoph Lameter <>
Signed-off-by: default avatarAndrew Morton <>
parent 57a4f91a
......@@ -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++) {
......@@ -3563,7 +3566,7 @@ static inline void __cache_free(struct kmem_cache *cachep, void *objp)
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))
if (likely(ac->avail < ac->limit)) {
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