add documentation for /sys/block/<disk>/queue/io_timeout Signed-off-by: Weiping Zhang <zhangweiping@xxxxxxxxxxxxxx> --- 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 <zhangweiping@xxxxxxxxxxxxxx> +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
