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authorChristoph Lameter <cl@linux.com>2011-06-01 12:25:57 -0500
committerPekka Enberg <penberg@kernel.org>2011-07-02 13:26:56 +0300
commite36a2652d7d1ad97f7636a39bdd8654d296cc36b (patch)
treefd01f6bf66b233e8e66a119ded39691914db7d7e /mm
parentfc59c05306fe1dcfa3fb8ba34ed45407fba4689c (diff)
downloadop-kernel-dev-e36a2652d7d1ad97f7636a39bdd8654d296cc36b.zip
op-kernel-dev-e36a2652d7d1ad97f7636a39bdd8654d296cc36b.tar.gz
slub: Add statistics for the case that the current slab does not match the node
Slub reloads the per cpu slab if the page does not satisfy the NUMA condition. Track those reloads since doing so has a performance impact. Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slub.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/mm/slub.c b/mm/slub.c
index 41a15c1..e00b773 100644
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -1966,6 +1966,7 @@ static void *__slab_alloc(struct kmem_cache *s, gfp_t gfpflags, int node,
goto new_slab;
if (unlikely(!node_match(c, node))) {
+ stat(s, ALLOC_NODE_MISMATCH);
deactivate_slab(s, c);
goto new_slab;
}
@@ -4671,6 +4672,7 @@ STAT_ATTR(FREE_REMOVE_PARTIAL, free_remove_partial);
STAT_ATTR(ALLOC_FROM_PARTIAL, alloc_from_partial);
STAT_ATTR(ALLOC_SLAB, alloc_slab);
STAT_ATTR(ALLOC_REFILL, alloc_refill);
+STAT_ATTR(ALLOC_NODE_MISMATCH, alloc_node_mismatch);
STAT_ATTR(FREE_SLAB, free_slab);
STAT_ATTR(CPUSLAB_FLUSH, cpuslab_flush);
STAT_ATTR(DEACTIVATE_FULL, deactivate_full);
@@ -4730,6 +4732,7 @@ static struct attribute *slab_attrs[] = {
&alloc_from_partial_attr.attr,
&alloc_slab_attr.attr,
&alloc_refill_attr.attr,
+ &alloc_node_mismatch_attr.attr,
&free_slab_attr.attr,
&cpuslab_flush_attr.attr,
&deactivate_full_attr.attr,
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