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| author |   Steffen Maier <maier@linux.ibm.com> | 2021-10-19 15:02:30 +0200 |
|---|---|---|
| committer |   Jonathan Corbet <corbet@lwn.net> | 2021-10-19 15:03:42 -0600 |
| commit | 7b5f80123104d8dd68d3348e20d9b56fe3a9ee77 (patch) | |
| tree | 222cffc3665df5e8ecc5194fabb7af2f5dbc089e /Documentation/ABI | |
| parent | scripts: kernel-doc: Ignore __alloc_size() attribute (diff) | |
| download | linux-dev-7b5f80123104d8dd68d3348e20d9b56fe3a9ee77.tar.xz linux-dev-7b5f80123104d8dd68d3348e20d9b56fe3a9ee77.zip | |
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 <maier@linux.ibm.com>
Reviewed-by: Jens Axboe <axboe@kernel.dk>
Link: https://lore.kernel.org/r/20211019130230.77594-1-maier@linux.ibm.com
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-block | 16 |
1 files changed, 16 insertions, 0 deletions
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 <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> |