From: Mike Snitzer <snitzer@redhat.com> To: Jens Axboe <axboe@kernel.dk> Cc: Mikulas Patocka <mpatocka@redhat.com>, dm-devel@redhat.com, linux-block@vger.kernel.org Subject: [PATCH v2 1/6] dm: dont rewrite dm_disk(md)->part0.in_flight Date: Fri, 30 Nov 2018 17:22:21 -0500 [thread overview] Message-ID: <20181130222226.77216-2-snitzer@redhat.com> (raw) In-Reply-To: <20181130222226.77216-1-snitzer@redhat.com> From: Mikulas Patocka <mpatocka@redhat.com> generic_start_io_acct and generic_end_io_acct already update the variable in_flight using atomic operations, so we don't have to overwrite them again. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> --- drivers/md/dm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index a733e4c920af..a8ae7931bce7 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -663,8 +663,7 @@ static void start_io_acct(struct dm_io *io) generic_start_io_acct(md->queue, bio_op(bio), bio_sectors(bio), &dm_disk(md)->part0); - atomic_set(&dm_disk(md)->part0.in_flight[rw], - atomic_inc_return(&md->pending[rw])); + atomic_inc(&md->pending[rw]); if (unlikely(dm_stats_used(&md->stats))) dm_stats_account_io(&md->stats, bio_data_dir(bio), @@ -693,7 +692,6 @@ static void end_io_acct(struct dm_io *io) * a flush. */ pending = atomic_dec_return(&md->pending[rw]); - atomic_set(&dm_disk(md)->part0.in_flight[rw], pending); pending += atomic_read(&md->pending[rw^0x1]); /* nudge anyone waiting on suspend queue */ -- 2.15.0
WARNING: multiple messages have this Message-ID (diff)
From: Mike Snitzer <snitzer@redhat.com> To: Jens Axboe <axboe@kernel.dk> Cc: linux-block@vger.kernel.org, dm-devel@redhat.com, Mikulas Patocka <mpatocka@redhat.com> Subject: [PATCH v2 1/6] dm: dont rewrite dm_disk(md)->part0.in_flight Date: Fri, 30 Nov 2018 17:22:21 -0500 [thread overview] Message-ID: <20181130222226.77216-2-snitzer@redhat.com> (raw) In-Reply-To: <20181130222226.77216-1-snitzer@redhat.com> From: Mikulas Patocka <mpatocka@redhat.com> generic_start_io_acct and generic_end_io_acct already update the variable in_flight using atomic operations, so we don't have to overwrite them again. Signed-off-by: Mikulas Patocka <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> --- drivers/md/dm.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index a733e4c920af..a8ae7931bce7 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -663,8 +663,7 @@ static void start_io_acct(struct dm_io *io) generic_start_io_acct(md->queue, bio_op(bio), bio_sectors(bio), &dm_disk(md)->part0); - atomic_set(&dm_disk(md)->part0.in_flight[rw], - atomic_inc_return(&md->pending[rw])); + atomic_inc(&md->pending[rw]); if (unlikely(dm_stats_used(&md->stats))) dm_stats_account_io(&md->stats, bio_data_dir(bio), @@ -693,7 +692,6 @@ static void end_io_acct(struct dm_io *io) * a flush. */ pending = atomic_dec_return(&md->pending[rw]); - atomic_set(&dm_disk(md)->part0.in_flight[rw], pending); pending += atomic_read(&md->pending[rw^0x1]); /* nudge anyone waiting on suspend queue */ -- 2.15.0
next prev parent reply other threads:[~2018-11-30 22:22 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-11-28 0:42 [PATCH 0/3] per-cpu in_flight counters for bio-based drivers Mikulas Patocka 2018-11-28 0:42 ` Mikulas Patocka 2018-11-30 14:43 ` Mike Snitzer 2018-11-30 14:43 ` Mike Snitzer 2018-11-30 15:50 ` Mike Snitzer 2018-11-30 15:50 ` Mike Snitzer 2018-11-30 19:57 ` Mike Snitzer 2018-11-30 19:57 ` Mike Snitzer 2018-11-30 22:22 ` [PATCH v2 0/6] " Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer [this message] 2018-11-30 22:22 ` [PATCH v2 1/6] dm: dont rewrite dm_disk(md)->part0.in_flight Mike Snitzer 2018-11-30 22:22 ` [PATCH v2 2/6] dm rq: leverage blk_mq_queue_busy() to check for outstanding IO Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer 2018-11-30 22:22 ` [PATCH v2 3/6] block: delete part_round_stats and switch to less precise counting Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer 2018-11-30 22:22 ` [PATCH v2 4/6] block: switch to per-cpu in-flight counters Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer 2018-12-05 17:30 ` Jens Axboe 2018-12-05 17:30 ` Jens Axboe 2018-12-05 17:49 ` Mike Snitzer 2018-12-05 17:49 ` Mike Snitzer 2018-12-05 17:54 ` Jens Axboe 2018-12-05 17:54 ` Jens Axboe 2018-12-05 18:03 ` Mike Snitzer 2018-12-05 18:03 ` Mike Snitzer 2018-12-05 18:04 ` Jens Axboe 2018-12-05 18:04 ` Jens Axboe 2018-12-05 18:18 ` Mike Snitzer 2018-12-05 18:18 ` Mike Snitzer 2018-12-05 18:35 ` Jens Axboe 2018-12-05 18:35 ` Jens Axboe 2018-11-30 22:22 ` [PATCH v2 5/6] block: return just one value from part_in_flight Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer 2018-11-30 22:22 ` [PATCH v2 6/6] dm: remove the pending IO accounting Mike Snitzer 2018-11-30 22:22 ` Mike Snitzer
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