On Wed, 2018-12-26 at 11:56 +0800, Weiping Zhang wrote: > Add documentation for /sys/block/<disk>/queue/io_timeout. > > Signed-off-by: Weiping Zhang <[email protected]> > --- > Documentation/ABI/testing/sysfs-block | 9 +++++++++ > Documentation/block/queue-sysfs.txt | 7 +++++++ > 2 files changed, 16 insertions(+) > > diff --git a/Documentation/ABI/testing/sysfs-block > b/Documentation/ABI/testing/sysfs-block > index 7710d4022b19..dfad7427817c 100644 > --- a/Documentation/ABI/testing/sysfs-block > +++ b/Documentation/ABI/testing/sysfs-block > @@ -279,3 +279,12 @@ Description: > size in 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 <[email protected]> > +Description: > + 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. > 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
Reviewed-by: Bart Van Assche <[email protected]>
