On Mon, 2019-01-07 at 08:43 -0700, Jens Axboe wrote: +AD4 On 1/7/19 5:52 AM, Weiping Zhang wrote: +AD4 +AD4 If the low level driver has no timerout handler, the +AD4 +AD4 /sys/block/+ADw-disk+AD4-/queue/io+AF8-timeout will not be displayed. +AD4 +AD4 The alternative would be to make it return an error when read/written +AD4 instead of having this separate group code. Hi Jens, Christoph and I had asked Weiping to use a sysfs attribute group. See also https://www.mail-archive.com/linux-block+AEA-vger.kernel.org/msg25841.html Best regards, Bart.
