Commit b0e497db authored by Damien Le Moal's avatar Damien Le Moal Committed by Jens Axboe
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Documentation: ABI: stable: document the zoned_qd1_writes attribute 



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

Signed-off-by: default avatarDamien Le Moal <dlemoal@kernel.org>
Reviewed-by: default avatarHannes Reinecke <hare@suse.de>
Reviewed-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarBart Van Assche <bvanassche@acm.org>
Reviewed-by: default avatarJohannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 3d9782f6

Documentation/ABI/stable/sysfs-block

+15 −0
Original line number Diff line number Diff line
@@ -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