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authorChristoph Lameter <clameter@sgi.com>2006-09-27 01:50:03 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-09-27 08:26:12 -0700
commitde3083ec3e6bfb1ab60bc8a410f37702529f953c (patch)
tree4093fcf3991e9af4be57c7c942dbea42011e4eb7
parent0fd0e6b05aa096622f151cac2f81f2e6844fb1bb (diff)
[PATCH] slab: fix kmalloc_node applying memory policies if nodeid == numa_node_id()
kmalloc_node() falls back to ___cache_alloc() under certain conditions and at that point memory policies may be applied redirecting the allocation away from the current node. Therefore kmalloc_node(...,numa_node_id()) or kmalloc_node(...,-1) may not return memory from the local node. Fix this by doing the policy check in __cache_alloc() instead of ____cache_alloc(). This version here is a cleanup of Kiran's patch. - Tested on ia64. - Extra material removed. - Consolidate the exit path if alternate_node_alloc() returned an object. [akpm@osdl.org: warning fix] Signed-off-by: Alok N Kataria <alok.kataria@calsoftinc.com> Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by: Shai Fultheim <shai@scalex86.org> 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/slab.c19
1 files changed, 9 insertions, 10 deletions
diff --git a/mm/slab.c b/mm/slab.c
index c52ebf9c446..69e11c45002 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -3028,14 +3028,6 @@ static inline void *____cache_alloc(struct kmem_cache *cachep, gfp_t flags)
void *objp;
struct array_cache *ac;
-#ifdef CONFIG_NUMA
- if (unlikely(current->flags & (PF_SPREAD_SLAB | PF_MEMPOLICY))) {
- objp = alternate_node_alloc(cachep, flags);
- if (objp != NULL)
- return objp;
- }
-#endif
-
check_irq_off();
ac = cpu_cache_get(cachep);
if (likely(ac->avail)) {
@@ -3053,12 +3045,19 @@ static __always_inline void *__cache_alloc(struct kmem_cache *cachep,
gfp_t flags, void *caller)
{
unsigned long save_flags;
- void *objp;
+ void *objp = NULL;
cache_alloc_debugcheck_before(cachep, flags);
local_irq_save(save_flags);
- objp = ____cache_alloc(cachep, flags);
+
+#ifdef CONFIG_NUMA
+ if (unlikely(current->flags & (PF_SPREAD_SLAB | PF_MEMPOLICY)))
+ objp = alternate_node_alloc(cachep, flags);
+#endif
+
+ if (!objp)
+ objp = ____cache_alloc(cachep, flags);
local_irq_restore(save_flags);
objp = cache_alloc_debugcheck_after(cachep, flags, objp,
caller);