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| author |   Christoph Lameter <cl@linux.com> | 2011-03-22 13:35:00 -0500 |
|---|---|---|
| committer |   Pekka Enberg <penberg@kernel.org> | 2011-03-22 20:48:04 +0200 |
| commit | 4fdccdfbb4652a7bbac8adbce7449eb093775118 (patch) | |
| tree | ff780cfea8087ea4143b1a2186257448f0bad3bb | |
| parent | slub: Add missing irq restore for the OOM path (diff) | |
| download | linux-dev-4fdccdfbb4652a7bbac8adbce7449eb093775118.tar.xz linux-dev-4fdccdfbb4652a7bbac8adbce7449eb093775118.zip | |
slub: Add statistics for this_cmpxchg_double failures
Add some statistics for debugging.
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Pekka Enberg <penberg@kernel.org>
| -rw-r--r-- | include/linux/slub_def.h | 1 | ||||
| -rw-r--r-- | mm/slub.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h index 90fbb6d87e11..45ca123e8002 100644 --- a/include/linux/slub_def.h +++ b/include/linux/slub_def.h @@ -32,6 +32,7 @@ enum stat_item { DEACTIVATE_TO_TAIL, /* Cpu slab was moved to the tail of partials */ DEACTIVATE_REMOTE_FREES,/* Slab contained remotely freed objects */ ORDER_FALLBACK, /* Number of times fallback was necessary */ + CMPXCHG_DOUBLE_CPU_FAIL,/* Failure of this_cpu_cmpxchg_double */ NR_SLUB_STAT_ITEMS }; struct kmem_cache_cpu { diff --git a/mm/slub.c b/mm/slub.c index e126cfbd3df2..93de30db95f5 100644 --- a/mm/slub.c +++ b/mm/slub.c @@ -217,7 +217,7 @@ static inline void sysfs_slab_remove(struct kmem_cache *s) #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 __this_cpu_inc(s->cpu_slab->stat[si]); @@ -1597,6 +1597,7 @@ static inline void note_cmpxchg_failure(const char *n, printk("for unknown reason: actual=%lx was=%lx target=%lx\n", actual_tid, tid, next_tid(tid)); #endif + stat(s, CMPXCHG_DOUBLE_CPU_FAIL); } #endif |