Message ID | 20230310073855.1337560-2-yukuai1@huaweicloud.com (mailing list archive) |
---|---|
State | Superseded, archived |
Delegated to: | Song Liu |
Headers | show |
Series | md/raid10: several simple obvious bugfix | expand |
On Thu, Mar 9, 2023 at 11:39 PM Yu Kuai <yukuai1@huaweicloud.com> wrote: > > From: Yu Kuai <yukuai3@huawei.com> > > handle_read_error() will resumit r10_bio by raid10_read_request(), which > will call bio_start_io_acct() again, while bio_end_io_acct() will only > be called once. > > Fix the problem by don't account io again from handle_read_error(). > > Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting") > Signed-off-by: Yu Kuai <yukuai3@huawei.com> > Acked-by: Guoqing Jiang <guoqing.jiang@linux.dev> I would rather keep same argument lists for raid10_read_request and raid10_write_request. How about we do something like this instead? diff --git i/drivers/md/raid10.c w/drivers/md/raid10.c index 6b39e6c7ada3..13f33a8a8fe8 100644 --- i/drivers/md/raid10.c +++ w/drivers/md/raid10.c @@ -1248,7 +1248,8 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio, } slot = r10_bio->read_slot; - if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) + if (!r10_bio->start_time && + blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) r10_bio->start_time = bio_start_io_acct(bio); read_bio = bio_alloc_clone(rdev->bdev, bio, gfp, &mddev->bio_set); @@ -1578,6 +1579,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors) r10_bio->sector = bio->bi_iter.bi_sector; r10_bio->state = 0; r10_bio->read_slot = -1; + r10_bio->start_time = 0; memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) * conf->geo.raid_disks); Thanks, Song > --- > drivers/md/raid10.c | 8 ++++---- > 1 file changed, 4 insertions(+), 4 deletions(-) > > diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c > index 6c66357f92f5..4f8edb6ea3e2 100644 > --- a/drivers/md/raid10.c > +++ b/drivers/md/raid10.c > @@ -1173,7 +1173,7 @@ static bool regular_request_wait(struct mddev *mddev, struct r10conf *conf, > } > > static void raid10_read_request(struct mddev *mddev, struct bio *bio, > - struct r10bio *r10_bio) > + struct r10bio *r10_bio, bool handle_error) > { > struct r10conf *conf = mddev->private; > struct bio *read_bio; > @@ -1244,7 +1244,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio, > } > slot = r10_bio->read_slot; > > - if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) > + if (!handle_error && blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) > r10_bio->start_time = bio_start_io_acct(bio); > read_bio = bio_alloc_clone(rdev->bdev, bio, gfp, &mddev->bio_set); > > @@ -1578,7 +1578,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors) > conf->geo.raid_disks); > > if (bio_data_dir(bio) == READ) > - raid10_read_request(mddev, bio, r10_bio); > + raid10_read_request(mddev, bio, r10_bio, false); > else > raid10_write_request(mddev, bio, r10_bio); > } > @@ -2980,7 +2980,7 @@ static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio) > rdev_dec_pending(rdev, mddev); > allow_barrier(conf); > r10_bio->state = 0; > - raid10_read_request(mddev, r10_bio->master_bio, r10_bio); > + raid10_read_request(mddev, r10_bio->master_bio, r10_bio, true); > } > > static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio) > -- > 2.31.1 >
Hi, 在 2023/03/14 6:08, Song Liu 写道: > On Thu, Mar 9, 2023 at 11:39 PM Yu Kuai <yukuai1@huaweicloud.com> wrote: >> >> From: Yu Kuai <yukuai3@huawei.com> >> >> handle_read_error() will resumit r10_bio by raid10_read_request(), which >> will call bio_start_io_acct() again, while bio_end_io_acct() will only >> be called once. >> >> Fix the problem by don't account io again from handle_read_error(). >> >> Fixes: 528bc2cf2fcc ("md/raid10: enable io accounting") >> Signed-off-by: Yu Kuai <yukuai3@huawei.com> >> Acked-by: Guoqing Jiang <guoqing.jiang@linux.dev> > > I would rather keep same argument lists for raid10_read_request > and raid10_write_request. How about we do something like this > instead? > > diff --git i/drivers/md/raid10.c w/drivers/md/raid10.c > index 6b39e6c7ada3..13f33a8a8fe8 100644 > --- i/drivers/md/raid10.c > +++ w/drivers/md/raid10.c > @@ -1248,7 +1248,8 @@ static void raid10_read_request(struct mddev > *mddev, struct bio *bio, > } > slot = r10_bio->read_slot; > > - if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) > + if (!r10_bio->start_time && > + blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) > r10_bio->start_time = bio_start_io_acct(bio); > read_bio = bio_alloc_clone(rdev->bdev, bio, gfp, &mddev->bio_set); > > @@ -1578,6 +1579,7 @@ static void __make_request(struct mddev *mddev, > struct bio *bio, int sectors) > r10_bio->sector = bio->bi_iter.bi_sector; > r10_bio->state = 0; > r10_bio->read_slot = -1; > + r10_bio->start_time = 0; > memset(r10_bio->devs, 0, sizeof(r10_bio->devs[0]) * > conf->geo.raid_disks); > > Thanks, > Song Of course, this looks better. I'll send a new verison for this patch. Thanks, Kuai
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index 6c66357f92f5..4f8edb6ea3e2 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1173,7 +1173,7 @@ static bool regular_request_wait(struct mddev *mddev, struct r10conf *conf, } static void raid10_read_request(struct mddev *mddev, struct bio *bio, - struct r10bio *r10_bio) + struct r10bio *r10_bio, bool handle_error) { struct r10conf *conf = mddev->private; struct bio *read_bio; @@ -1244,7 +1244,7 @@ static void raid10_read_request(struct mddev *mddev, struct bio *bio, } slot = r10_bio->read_slot; - if (blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) + if (!handle_error && blk_queue_io_stat(bio->bi_bdev->bd_disk->queue)) r10_bio->start_time = bio_start_io_acct(bio); read_bio = bio_alloc_clone(rdev->bdev, bio, gfp, &mddev->bio_set); @@ -1578,7 +1578,7 @@ static void __make_request(struct mddev *mddev, struct bio *bio, int sectors) conf->geo.raid_disks); if (bio_data_dir(bio) == READ) - raid10_read_request(mddev, bio, r10_bio); + raid10_read_request(mddev, bio, r10_bio, false); else raid10_write_request(mddev, bio, r10_bio); } @@ -2980,7 +2980,7 @@ static void handle_read_error(struct mddev *mddev, struct r10bio *r10_bio) rdev_dec_pending(rdev, mddev); allow_barrier(conf); r10_bio->state = 0; - raid10_read_request(mddev, r10_bio->master_bio, r10_bio); + raid10_read_request(mddev, r10_bio->master_bio, r10_bio, true); } static void handle_write_completed(struct r10conf *conf, struct r10bio *r10_bio)