[dm-devel] [PATCH v5 6/7] block: Set ELEVATOR_F_ZBD_SEQ_WRITE for nullblk zoned disks
Damien Le Moal
damien.lemoal at wdc.com
Thu Sep 5 09:51:34 UTC 2019
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 at wdc.com>
Reviewed-by: Christoph Hellwig <hch at lst.de>
Reviewed-by: Johannes Thumshirn <jthumshirn at 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
More information about the dm-devel
mailing list