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| author | Jinke Han <hanjinke.666@bytedance.com> | 2023-05-07 19:06:31 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-06-25 16:00:39 +0200 |
| commit | ad7c3b41e86b59943a903d23c7b037d820e6270c (patch) | |
| tree | c796b16a7c7487459ecb32bc10cd33259d8a9ae9 /block/blk-throttle.c | |
| parent | bcache: Fix bcache device claiming (diff) | |
| download | linux-ad7c3b41e86b59943a903d23c7b037d820e6270c.tar.xz linux-ad7c3b41e86b59943a903d23c7b037d820e6270c.zip | |
blk-throttle: Fix io statistics for cgroup v1
After commit f382fb0bcef4 ("block: remove legacy IO schedulers"),
blkio.throttle.io_serviced and blkio.throttle.io_service_bytes become
the only stable io stats interface of cgroup v1, and these statistics
are done in the blk-throttle code. But the current code only counts the
bios that are actually throttled. When the user does not add the throttle
limit, the io stats for cgroup v1 has nothing. I fix it according to the
statistical method of v2, and made it count all ios accurately.
Fixes: a7b36ee6ba29 ("block: move blk-throtl fast path inline")
Tested-by: Andrea Righi <andrea.righi@canonical.com>
Signed-off-by: Jinke Han <hanjinke.666@bytedance.com>
Acked-by: Muchun Song <songmuchun@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230507170631.89607-1-hanjinke.666@bytedance.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-throttle.c')
| -rw-r--r-- | block/blk-throttle.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 9d010d867fbf..7397ff199d66 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -2178,12 +2178,6 @@ bool __blk_throtl_bio(struct bio *bio) rcu_read_lock(); - if (!cgroup_subsys_on_dfl(io_cgrp_subsys)) { - blkg_rwstat_add(&tg->stat_bytes, bio->bi_opf, - bio->bi_iter.bi_size); - blkg_rwstat_add(&tg->stat_ios, bio->bi_opf, 1); - } - spin_lock_irq(&q->queue_lock); throtl_update_latency_buckets(td); |