Can you please also send a patch to not show this attribute for drivers without a timeout handler? Thanks! On Wed, Dec 05, 2018 at 10:17:06PM +0800, Weiping Zhang wrote: > 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 > ---end quoted text---
