4fdccdfbb465 ("slub: Add statistics for this_cmpxchg_double failures")
added CMPXCHG_DOUBLE_CPU_FAIL to show how many times
this_cpu_cmpxchg_double has failed, but it also needs to be exported to
userspace for consumption.
This will always be 0 if CONFIG_CMPXCHG_LOCAL is disabled.
Acked-by: Christoph Lameter <cl@xxxxxxxxx>
Signed-off-by: David Rientjes <rientjes@xxxxxxxxxx>
---
mm/slub.c | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/mm/slub.c b/mm/slub.c
--- a/mm/slub.c
+++ b/mm/slub.c
@@ -4525,6 +4525,7 @@ STAT_ATTR(DEACTIVATE_TO_HEAD, deactivate_to_head);
STAT_ATTR(DEACTIVATE_TO_TAIL, deactivate_to_tail);
STAT_ATTR(DEACTIVATE_REMOTE_FREES, deactivate_remote_frees);
STAT_ATTR(ORDER_FALLBACK, order_fallback);
+STAT_ATTR(CMPXCHG_DOUBLE_CPU_FAIL, cmpxchg_double_cpu_fail);
#endif
static struct attribute *slab_attrs[] = {
@@ -4582,6 +4583,7 @@ static struct attribute *slab_attrs[] = {
&deactivate_to_tail_attr.attr,
&deactivate_remote_frees_attr.attr,
&order_fallback_attr.attr,
+ &cmpxchg_double_cpu_fail_attr.attr,
#endif
#ifdef CONFIG_FAILSLAB
&failslab_attr.attr,
--
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