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From: Weiping Zhang <zhangweiping@didiglobal.com>
To: <axboe@kernel.dk>
Cc: <bvanassche@acm.org>, <linux-block@vger.kernel.org>
Subject: [PATCH] block: add documentation for io_timeout
Date: Thu, 29 Nov 2018 00:54:18 +0800	[thread overview]
Message-ID: <20181128165415.GA38237@192.168.3.9> (raw)

add documentation for /sys/block/<disk>/queue/io_timeout

Signed-off-by: Weiping Zhang <zhangweiping@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..f37c0000ca16 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@didiglobal.com>
+Description:
+		io_timeout is the timeout in millisecods of a request in
+		block layer. The block layer will start a timer when low
+		level device driver start the request, and cancle timer
+		when request completes.
diff --git a/Documentation/block/queue-sysfs.txt b/Documentation/block/queue-sysfs.txt
index 2c1e67058fd3..cbd44fe056fa 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 millisecods of a request in block layer.
+The block layer will start a timer when low level device driver start
+the request, and cancle timer when request completes.
+
 iostats (RW)
 -------------
 This file is used to control (on/off) the iostats accounting of the
-- 
2.14.1


             reply	other threads:[~2018-11-28 16:54 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-28 16:54 Weiping Zhang [this message]
2018-11-28 17:06 ` [PATCH] block: add documentation for io_timeout Bart Van Assche

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