Commit 7b5f8012 authored by Steffen Maier's avatar Steffen Maier Committed by Jonathan Corbet
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block: add documentation for inflight 



Complements v2.6.32 commit a9327cac ("Seperate read and write
statistics of in_flight requests") and commit 316d315b ("block:
Seperate read and write statistics of in_flight requests v2").

Signed-off-by: default avatarSteffen Maier <maier@linux.ibm.com>
Reviewed-by: default avatarJens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20211019130230.77594-1-maier@linux.ibm.com


Signed-off-by: default avatarJonathan Corbet <corbet@lwn.net>
parent a40a8a11

Documentation/ABI/testing/sysfs-block

+16 −0
Original line number Diff line number Diff line
@@ -28,6 +28,22 @@ Description: 
		For more details refer Documentation/admin-guide/iostats.rst





What:		/sys/block/<disk>/inflight

Date:		October 2009

Contact:	Jens Axboe <axboe@kernel.dk>, Nikanth Karthikesan <knikanth@suse.de>

Description:

		Reports the number of I/O requests currently in progress

		(pending / in flight) in a device driver. This can be less

		than the number of requests queued in the block device queue.

		The report contains 2 fields: one for read requests

		and one for write requests.

		The value type is unsigned int.

		Cf. Documentation/block/stat.rst which contains a single value for

		requests in flight.

		This is related to nr_requests in Documentation/block/queue-sysfs.rst

		and for SCSI device also its queue_depth.





What:		/sys/block/<disk>/diskseq

Date:		February 2021

Contact:	Matteo Croce <mcroce@microsoft.com>