Re: [PATCH] scsi_lib: increase {host|target|device}_busy count after dispatch cmd

[Bart Van Assche]

On Mon, 2017-06-05 at 17:37 +0800, Ganesh Mahendran wrote:
> In android system, when there are lots of threads running. Thread A
> holding *host_busy* count is easily to be preempted, and if at the
> same time, thread B set *host_blocked*, then all other threads will
> be io blocked.

Hello Ganesh,

Have you considered to insert preempt_disable() and preempt_enable() calls
where necessary to achieve the same effect? I think that would result in a
much less intrusive patch.

Thanks,

Bart.