Re: [PATCH] SCSI: run queue if SCSI device queue isn't ready and queue is idle

[Bart Van Assche]

On Tue, 2017-12-05 at 15:29 +0100, Johannes Thumshirn wrote:
> 1) Testing without the patch applied hangs the test forever as it
>    doesn't get killed after a specific timeout (I think this should be
>    solved in a common function).

Hello Johannes,

If a request queue got stuck then the processes that submitted the requests
on that queue are unkillable. The only approach I know of to stop these
processes is to send a kill signal and next to trigger a queue run from user
space. One possible approach is to run the following command:

    for d in /sys/kernel/debug/block/*; do echo kick >$d/state; done

Bart.