2021-10-19 13:05:57

by Steffen Maier

Subject: [PATCH] block: add documentation for inflight

Complements v2.6.32 commit a9327cac440b ("Seperate read and write
statistics of in_flight requests") and commit 316d315bffa4 ("block:
Seperate read and write statistics of in_flight requests v2").

Signed-off-by: Steffen Maier <[email protected]>
---
Documentation/ABI/testing/sysfs-block | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block
index a0ed87386639..b16b0c45a272 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -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 <[email protected]>, Nikanth Karthikesan <[email protected]>
+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 <[email protected]>
--
2.27.0

2021-10-19 17:11:42

by Jens Axboe

Subject: Re: [PATCH] block: add documentation for inflight

On 10/19/21 7:02 AM, Steffen Maier wrote:
> Complements v2.6.32 commit a9327cac440b ("Seperate read and write
> statistics of in_flight requests") and commit 316d315bffa4 ("block:
> Seperate read and write statistics of in_flight requests v2").

Jon, probably better if you take this through the doc tree. You can
add my:

Reviewed-by: Jens Axboe <[email protected]>

--
Jens Axboe

2021-10-19 21:06:04

by Jonathan Corbet

Subject: Re: [PATCH] block: add documentation for inflight

Jens Axboe <[email protected]> writes:

> On 10/19/21 7:02 AM, Steffen Maier wrote:
>> Complements v2.6.32 commit a9327cac440b ("Seperate read and write
>> statistics of in_flight requests") and commit 316d315bffa4 ("block:
>> Seperate read and write statistics of in_flight requests v2").
>
> Jon, probably better if you take this through the doc tree. You can
> add my:
>
> Reviewed-by: Jens Axboe <[email protected]>

Done.

Thanks,

jon