Commit 4fdccdfb authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
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slub: Add statistics for this_cmpxchg_double failures



Add some statistics for debugging.

Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 2fd66c51
...@@ -32,6 +32,7 @@ enum stat_item { ...@@ -32,6 +32,7 @@ enum stat_item {
DEACTIVATE_TO_TAIL, /* Cpu slab was moved to the tail of partials */ DEACTIVATE_TO_TAIL, /* Cpu slab was moved to the tail of partials */
DEACTIVATE_REMOTE_FREES,/* Slab contained remotely freed objects */ DEACTIVATE_REMOTE_FREES,/* Slab contained remotely freed objects */
ORDER_FALLBACK, /* Number of times fallback was necessary */ ORDER_FALLBACK, /* Number of times fallback was necessary */
CMPXCHG_DOUBLE_CPU_FAIL,/* Failure of this_cpu_cmpxchg_double */
NR_SLUB_STAT_ITEMS }; NR_SLUB_STAT_ITEMS };
struct kmem_cache_cpu { struct kmem_cache_cpu {
......
...@@ -217,7 +217,7 @@ static inline void sysfs_slab_remove(struct kmem_cache *s) ...@@ -217,7 +217,7 @@ static inline void sysfs_slab_remove(struct kmem_cache *s)
#endif #endif
static inline void stat(struct kmem_cache *s, enum stat_item si) static inline void stat(const struct kmem_cache *s, enum stat_item si)
{ {
#ifdef CONFIG_SLUB_STATS #ifdef CONFIG_SLUB_STATS
__this_cpu_inc(s->cpu_slab->stat[si]); __this_cpu_inc(s->cpu_slab->stat[si]);
...@@ -1597,6 +1597,7 @@ static inline void note_cmpxchg_failure(const char *n, ...@@ -1597,6 +1597,7 @@ static inline void note_cmpxchg_failure(const char *n,
printk("for unknown reason: actual=%lx was=%lx target=%lx\n", printk("for unknown reason: actual=%lx was=%lx target=%lx\n",
actual_tid, tid, next_tid(tid)); actual_tid, tid, next_tid(tid));
#endif #endif
stat(s, CMPXCHG_DOUBLE_CPU_FAIL);
} }
#endif #endif
......
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