Add documentation for /sys/block/<disk>/queue/io_timeout. Signed-off-by: Weiping Zhang <zhangweiping@xxxxxxxxxxxxxx> --- Documentation/ABI/testing/sysfs-block | 10 ++++++++++ Documentation/block/queue-sysfs.txt | 7 +++++++ 2 files changed, 17 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-block b/Documentation/ABI/testing/sysfs-block index dea212db9df3..f254a374710a 100644 --- a/Documentation/ABI/testing/sysfs-block +++ b/Documentation/ABI/testing/sysfs-block @@ -271,3 +271,13 @@ 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 a request’s timeouts at block layer in + milliseconds. When the underlying driver starts processing + a request, the generic block layer will start a timer, if + this request cannot be completed in io_timeout milliseconds, + a timeout event will occur. diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt index 2c1e67058fd3..f0c9bbce73fd 100644 --- a/Documentation/block/queue-sysfs.txt +++ b/Documentation/block/queue-sysfs.txt @@ -67,6 +67,13 @@ 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 a request’s timeouts at block layer in milliseconds. When the +underlying driver starts processing a request, the generic block layer +will start a timer, if this request cannot be completed in io_timeout +milliseconds, a timeout event will occur. + iostats (RW) ------------- This file is used to control (on/off) the iostats accounting of the -- 2.14.1
