Re: [PATCH v6] block: loop: avoiding too many pending per work I/O

[Tejun Heo]

On Fri, May 01, 2015 at 08:05:45AM -0700, Christoph Hellwig wrote:
> > Maybe just cap max_active to NR_OF_LOOP_DEVS * 16 or sth?  But idk,
> > how many concurrent workers are we talking about and why are we
> > capping per-queue concurrency from worker pool side instead of command
> > tag side?
> 
> Also we probably should have per device workqueues to start with..

Yeah, that's an option.  The only thing is that each workqueue would
have to be tagged WQ_RESCUER and end up with separate rescuer task,
which usually isn't big a deal but there are setups where a lot of
loop devices are used and it may sting a bit.

Thanks.

-- 
tejun
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