[PATCH 12/26] ublk_drv: Do not request ELEVATOR_F_ZBD_SEQ_WRITE elevator feature

Damien Le Moal
2024-02-02T07:31:24Z

With zone write plugging enabled at the block layer level, any zone
device can only ever see at most a single write operation per zone.
There is thus no need to request a block scheduler with strick per-zone
sequential write ordering control through the ELEVATOR_F_ZBD_SEQ_WRITE
feature. Removing this allows using a zoned ublk device with any
scheduler, including "none".

Signed-off-by: Damien Le Moal <dlemoal@kernel.org>
---
drivers/block/ublk_drv.c | 2 --
1 file changed, 2 deletions(-)

diff --git a/drivers/block/ublk_drv.c b/drivers/block/ublk_drv.c
index 1dfb2e77898b..35fb9cc739eb 100644
--- a/drivers/block/ublk_drv.c
+++ b/drivers/block/ublk_drv.c
@@ -252,8 +252,6 @@ static int ublk_dev_param_zoned_apply(struct ublk_device *ub)

disk_set_zoned(ub->ub_disk);
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, ub->ub_disk->queue);
- blk_queue_required_elevator_features(ub->ub_disk->queue,
- ELEVATOR_F_ZBD_SEQ_WRITE);
disk_set_max_active_zones(ub->ub_disk, p->max_active_zones);
disk_set_max_open_zones(ub->ub_disk, p->max_open_zones);
blk_queue_max_zone_append_sectors(ub->ub_disk->queue, p->max_zone_append_sectors);
--
2.43.0