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authorDamien Le Moal2024-04-08 10:41:15 +0900
committerJens Axboe2024-04-17 08:44:03 -0600
commitb66f79b706f0cfc09bde8465668428eef188a94c (patch)
tree751710c14b9caae7af56e00ac04c7d640048d89a /drivers/block
parent11be0cb5fe25603472831f85abb32f0112239238 (diff)
null_blk: Do not request ELEVATOR_F_ZBD_SEQ_WRITE elevator feature
With zone write plugging enabled at the block layer level, a zoned 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 null_blk device with any scheduler, including "none". Signed-off-by: Damien Le Moal <dlemoal@kernel.org> Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Bart Van Assche <bvanassche@acm.org> Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com> Tested-by: Hans Holmberg <hans.holmberg@wdc.com> Tested-by: Dennis Maisenbacher <dennis.maisenbacher@wdc.com> Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com> Link: https://lore.kernel.org/r/20240408014128.205141-16-dlemoal@kernel.org Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/block')
-rw-r--r--drivers/block/null_blk/zoned.c1
1 files changed, 0 insertions, 1 deletions
diff --git a/drivers/block/null_blk/zoned.c b/drivers/block/null_blk/zoned.c
index 1689e2584104..8e217f8fadcd 100644
--- a/drivers/block/null_blk/zoned.c
+++ b/drivers/block/null_blk/zoned.c
@@ -165,7 +165,6 @@ int null_register_zoned_dev(struct nullb *nullb)
struct request_queue *q = nullb->q;
blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
- blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
nullb->disk->nr_zones = bdev_nr_zones(nullb->disk->part0);
return blk_revalidate_disk_zones(nullb->disk, NULL);
}