Use group allocation/free of per-cpu counters api to accelerate
blkg_rwstat_init/exit() and simplify code.
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
block/blk-cgroup-rwstat.c | 18 ++++++------------
1 file changed, 6 insertions(+), 12 deletions(-)
diff --git a/block/blk-cgroup-rwstat.c b/block/blk-cgroup-rwstat.c
index 3304e841df7c..a55fb0c53558 100644
--- a/block/blk-cgroup-rwstat.c
+++ b/block/blk-cgroup-rwstat.c
@@ -9,25 +9,19 @@ int blkg_rwstat_init(struct blkg_rwstat *rwstat, gfp_t gfp)
{
int i, ret;
- for (i = 0; i < BLKG_RWSTAT_NR; i++) {
- ret = percpu_counter_init(&rwstat->cpu_cnt[i], 0, gfp);
- if (ret) {
- while (--i >= 0)
- percpu_counter_destroy(&rwstat->cpu_cnt[i]);
- return ret;
- }
+ ret = percpu_counter_init_many(rwstat->cpu_cnt, 0, gfp, BLKG_RWSTAT_NR);
+ if (ret)
+ return ret;
+
+ for (i = 0; i < BLKG_RWSTAT_NR; i++)
atomic64_set(&rwstat->aux_cnt[i], 0);
- }
return 0;
}
EXPORT_SYMBOL_GPL(blkg_rwstat_init);
void blkg_rwstat_exit(struct blkg_rwstat *rwstat)
{
- int i;
-
- for (i = 0; i < BLKG_RWSTAT_NR; i++)
- percpu_counter_destroy(&rwstat->cpu_cnt[i]);
+ percpu_counter_destroy_many(rwstat->cpu_cnt, BLKG_RWSTAT_NR);
}
EXPORT_SYMBOL_GPL(blkg_rwstat_exit);
--
2.41.0
