diff options
| author | Chengming Zhou <zhouchengming@bytedance.com> | 2022-02-13 11:59:02 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-08 15:23:06 +0300 |
| commit | e129fb0651066611227a78c1894f19fb289520f5 (patch) | |
| tree | 865247d4256cc19c26574fac85e2498dd846be32 /block | |
| parent | c17eb1586c94d7a2bf72220566146232aaf16be0 (diff) | |
| download | linux-e129fb0651066611227a78c1894f19fb289520f5.tar.xz | |
blk-cgroup: set blkg iostat after percpu stat aggregation
[ Upstream commit f122d103b564e5fb7c82de902c6f8f6cbdf50ec9 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'block')
| -rw-r--r-- | block/blk-cgroup.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 0eec59e4df65..07a2524e6efd 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -855,11 +855,11 @@ static void blkcg_fill_root_iostats(void) blk_queue_root_blkg(bdev->bd_disk->queue); 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] += @@ -875,11 +875,11 @@ 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); } } |