add documentation for /sys/block/<disk>/queue/io_timeout
Signed-off-by: Weiping Zhang <zhangweip...@didiglobal.com>
---
Documentation/ABI/testing/sysfs-block | 9 +++++++++
Documentation/block/queue-sysfs.txt | 6 ++++++
2 files changed, 15 insertions(+)
diff --git a/Documentation/ABI/testing/sysfs-block
b/Documentation/ABI/testing/sysfs-block
index dea212db9df3..6befa2ce667d 100644
--- a/Documentation/ABI/testing/sysfs-block
+++ b/Documentation/ABI/testing/sysfs-block
@@ -271,3 +271,12 @@ Description:
size of 512B sectors of the zones of the device, with
the eventual exception of the last zone of the device
which may be smaller.
+
+What: /sys/block/<disk>/queue/io_timeout
+Date: November 2018
+Contact: Weiping Zhang <zhangweip...@didiglobal.com>
+Description:
+ io_timeout is the timeout in milliseconds of a request in
+ block layer. The block layer will start a timer when low
+ level device driver start the request, and cancel timer
+ when request completes.
diff --git a/Documentation/block/queue-sysfs.txt
b/Documentation/block/queue-sysfs.txt
index 2c1e67058fd3..c0f2a9c92cce 100644
--- a/Documentation/block/queue-sysfs.txt
+++ b/Documentation/block/queue-sysfs.txt
@@ -67,6 +67,12 @@ If set to a value larger than 0, the kernel will put the
process issuing
IO to sleep for this amont of microseconds before entering classic
polling.
+io_timeout (RW)
+---------------
+This is the timeout in milliseconds of a request in block layer.
+The block layer will start a timer when low level device driver start
+the request, and cancel timer when request completes.
+
iostats (RW)
-------------
This file is used to control (on/off) the iostats accounting of the
--
2.14.1
