From bb351abaf5cd4f9237e1b3094d9cc04853de6d95 Mon Sep 17 00:00:00 2001 From: Weiping Zhang Date: Wed, 26 Dec 2018 11:56:33 +0800 Subject: block: add documentation for io_timeout Add documentation for /sys/block//queue/io_timeout. Reviewed-by: Bart Van Assche Signed-off-by: Weiping Zhang Signed-off-by: Jens Axboe --- Documentation/block/queue-sysfs.txt | 7 +++++++ 1 file changed, 7 insertions(+) (limited to 'Documentation/block') diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt index 39e286d7afc9..83b457e24bba 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 amount of microseconds before entering classic polling. +io_timeout (RW) +--------------- +io_timeout is the request timeout in milliseconds. If a request does not +complete in this time then the block driver timeout handler is invoked. +That timeout handler can decide to retry the request, to fail it or to start +a device recovery strategy. + iostats (RW) ------------- This file is used to control (on/off) the iostats accounting of the -- cgit v1.2.3