nhu/kernel_a52xq
Watch
1
Fork
You've already forked kernel_a52xq
 0
mirror of https://github.com/a52xq-dev/kernel.git synced 2026-10-18 21:58:11 +07:00
Code Issues Projects Releases Wiki Activity

blk-iolatency: only account submitted bios

Browse source 
[ Upstream commit a3fb01ba5af066521f3f3421839e501bb2c71805 ]

As is, iolatency recognizes done_bio and cleanup as ending paths. If a
request is marked REQ_NOWAIT and fails to get a request, the bio is
cleaned up via rq_qos_cleanup() and ended in bio_wouldblock_error().
This results in underflowing the inflight counter. Fix this by only
accounting bios that were actually submitted.

Signed-off-by: Dennis Zhou <dennis@kernel.org>
Cc: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dennis Zhou 2019-05-23 16:10:18 -04:00 • committed by Greg Kroah-Hartman
commit 3ae98dc2db
1 changed files with 4 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

4
block/blk-iolatency.c
View file

@ -565,6 +565,10 @@ static void blkcg_iolatency_done_bio(struct rq_qos *rqos, struct bio *bio)
if (!blkg)
return;
/* We didn't actually submit this bio, don't account it. */
if (bio->bi_status == BLK_STS_AGAIN)
return;
iolat = blkg_to_lat(bio->bi_blkg);
if (!iolat)
return;