diff mbox series

[v3,6/7] block: Set ELEVATOR_F_ZBD_SEQ_WRITE for nullblk zoned disks

Message ID 20190904084247.23338-7-damien.lemoal@wdc.com (mailing list archive)
State New, archived
Headers show
Series Elevator cleanups and improvements | expand

Commit Message

Damien Le Moal Sept. 4, 2019, 8:42 a.m. UTC 
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>
---
 drivers/block/null_blk_main.c | 2 ++
 1 file changed, 2 insertions(+)

Comments

Johannes Thumshirn Sept. 4, 2019, 8:52 a.m. UTC | #1 
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
diff mbox series

Patch

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;