diff mbox series

[v3,7/7] sd: Set ELEVATOR_F_ZBD_SEQ_WRITE for ZBC disks

Message ID 20190904084247.23338-8-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 SCSI ZBC disks.

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/scsi/sd_zbc.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/scsi/sd_zbc.c b/drivers/scsi/sd_zbc.c
index 367614f0e34f..de4019dc0f0b 100644
--- a/drivers/scsi/sd_zbc.c
+++ b/drivers/scsi/sd_zbc.c
@@ -493,6 +493,8 @@  int sd_zbc_read_zones(struct scsi_disk *sdkp, unsigned char *buf)
 	blk_queue_chunk_sectors(sdkp->disk->queue,
 			logical_to_sectors(sdkp->device, zone_blocks));
 	blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, sdkp->disk->queue);
+	blk_queue_required_elevator_features(sdkp->disk->queue,
+					     ELEVATOR_F_ZBD_SEQ_WRITE);
 	nr_zones = round_up(sdkp->capacity, zone_blocks) >> ilog2(zone_blocks);
 
 	/* READ16/WRITE16 is mandatory for ZBC disks */