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Documentation: ABI: stable: document the zoned_qd1_writes attribute

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Update the documentation file Documentation/ABI/stable/sysfs-block to
describe the zoned_qd1_writes sysfs queue attribute file.

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: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Damien Le Moal
2026-02-27 22:19:51 +09:00
committed by Jens Axboe
parent 3d9782f62f
commit b0e497db68
1 changed files with 15 additions and 0 deletions
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Documentation/ABI/stable/sysfs-block
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@@ -886,6 +886,21 @@ Description:
zone commands, they will be treated as regular block devices and
zoned will report "none".
What: /sys/block/<disk>/queue/zoned_qd1_writes
Date: January 2026
Contact: Damien Le Moal <dlemoal@kernel.org>
Description:
[RW] zoned_qd1_writes indicates if write operations to a zoned
block device are being handled using a single issuer context (a
kernel thread) operating at a maximum queue depth of 1. This
attribute is visible only for zoned block devices. The default
value for zoned block devices that are not rotational devices
(e.g. ZNS SSDs or zoned UFS devices) is 0. For rotational zoned
block devices (e.g. SMR HDDs) the default value is 1. Since
this default may not be appropriate for some devices, e.g.
remotely connected devices over high latency networks, the user
can disable this feature by setting this attribute to 0.
What: /sys/block/<disk>/hidden
Date: March 2023