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authorChengming Zhou <zhouchengming@bytedance.com>2022-02-13 16:59:02 +0800
committerJens Axboe <axboe@kernel.dk>2022-02-15 14:13:12 -0700
commitf122d103b564e5fb7c82de902c6f8f6cbdf50ec9 (patch)
tree13ffa5fba9d86a83437063ef96ee0e9889c078e9 /block
parentec9fd2a13d743ae129bd1b5c6edea0d65260ce10 (diff)
blk-cgroup: set blkg iostat after percpu stat aggregation
Don't need to do blkg_iostat_set for top blkg iostat on each CPU, so move it after percpu stat aggregation. Fixes: ef45fe470e1e ("blk-cgroup: show global disk stats in root cgroup io.stat") Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20220213085902.88884-1-zhouchengming@bytedance.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-cgroup.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 4108d445c73a..fa063c6c0338 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -856,11 +856,11 @@ static void blkcg_fill_root_iostats(void)
blk_queue_root_blkg(bdev_get_queue(bdev));
struct blkg_iostat tmp;
int cpu;
+ unsigned long flags;
memset(&tmp, 0, sizeof(tmp));
for_each_possible_cpu(cpu) {
struct disk_stats *cpu_dkstats;
- unsigned long flags;
cpu_dkstats = per_cpu_ptr(bdev->bd_stats, cpu);
tmp.ios[BLKG_IOSTAT_READ] +=
@@ -876,11 +876,11 @@ static void blkcg_fill_root_iostats(void)
cpu_dkstats->sectors[STAT_WRITE] << 9;
tmp.bytes[BLKG_IOSTAT_DISCARD] +=
cpu_dkstats->sectors[STAT_DISCARD] << 9;
-
- flags = u64_stats_update_begin_irqsave(&blkg->iostat.sync);
- blkg_iostat_set(&blkg->iostat.cur, &tmp);
- u64_stats_update_end_irqrestore(&blkg->iostat.sync, flags);
}
+
+ flags = u64_stats_update_begin_irqsave(&blkg->iostat.sync);
+ blkg_iostat_set(&blkg->iostat.cur, &tmp);
+ u64_stats_update_end_irqrestore(&blkg->iostat.sync, flags);
}
}