From: Damien Le Moal <damien.lemoal@wdc.com>
To: linux-block@vger.kernel.org, Jens Axboe <axboe@kernel.dk>,
linux-scsi@vger.kernel.org,
"Martin K . Petersen" <martin.petersen@oracle.com>,
dm-devel@redhat.com, Mike Snitzer <snitzer@redhat.com>
Cc: Ming Lei <ming.lei@redhat.com>
Subject: [PATCH v5 6/7] block: Set ELEVATOR_F_ZBD_SEQ_WRITE for nullblk zoned disks
Date: Thu, 5 Sep 2019 18:51:34 +0900 [thread overview]
Message-ID: <20190905095135.26026-7-damien.lemoal@wdc.com> (raw)
In-Reply-To: <20190905095135.26026-1-damien.lemoal@wdc.com>
Using the helper blk_queue_required_elevator_features(), set the
elevator feature ELEVATOR_F_ZBD_SEQ_WRITE as required for the request
queue of null_blk devices created with zoned mode enabled.
This feature requirement can always be satisfied as the mq-deadline
elevator is always selected for in-kernel compilation when
CONFIG_BLK_DEV_ZONED (zoned block device support) is enabled.
Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
---
drivers/block/null_blk_main.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/block/null_blk_main.c b/drivers/block/null_blk_main.c
index b26a178d064d..b29b273690b0 100644
--- a/drivers/block/null_blk_main.c
+++ b/drivers/block/null_blk_main.c
@@ -1695,6 +1695,8 @@ static int null_add_dev(struct nullb_device *dev)
blk_queue_chunk_sectors(nullb->q, dev->zone_size_sects);
nullb->q->limits.zoned = BLK_ZONED_HM;
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, nullb->q);
+ blk_queue_required_elevator_features(nullb->q,
+ ELEVATOR_F_ZBD_SEQ_WRITE);
}
nullb->q->queuedata = nullb;
--
2.21.0
next prev parent reply other threads:[~2019-09-05 9:51 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-05 9:51 [PATCH v5 0/7] Elevator cleanups and improvements Damien Le Moal
2019-09-05 9:51 ` [PATCH v5 1/7] block: Cleanup elevator_init_mq() use Damien Le Moal
2019-09-05 9:51 ` [PATCH v5 2/7] block: Change elevator_init_mq() to always succeed Damien Le Moal
2019-09-05 9:51 ` [PATCH v5 3/7] block: Introduce elevator features Damien Le Moal
2019-09-05 9:51 ` [PATCH v5 4/7] block: Improve default elevator selection Damien Le Moal
2019-09-05 9:51 ` [PATCH v5 5/7] block: Delay default elevator initialization Damien Le Moal
2019-10-01 20:46 ` Eric Farman
2019-10-16 18:51 ` Eric Farman
2019-10-17 2:39 ` Damien Le Moal
2019-10-17 13:37 ` Eric Farman
2019-09-05 9:51 ` Damien Le Moal [this message]
2019-09-05 9:51 ` [PATCH v5 7/7] sd: Set ELEVATOR_F_ZBD_SEQ_WRITE for ZBC disks Damien Le Moal
2019-09-06 0:31 ` [PATCH v5 0/7] Elevator cleanups and improvements Ming Lei
2019-09-06 1:53 ` Jens Axboe
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