Re: Freezable workqueue blocks non-freezable workqueue during the system resume process

[Tejun Heo]

Hello, Peter.

On Wed, Feb 24, 2016 at 03:24:30PM +0800, Peter Chen wrote:
> > You might want to complain to the block-layer people about this.  I 
> > don't know if anything can be done to fix it.
> > 
> > Or maybe flush_work and flush_delayed_work can be changed to avoid 
> > blocking if the workqueue is frozen.  Tejun?
> > 
> 
> I have a patch to show the root cause of this issue.
> 
> http://www.spinics.net/lists/linux-usb/msg136815.html

I don't get it.  Why would it deadlock?  Shouldn't things get rolling
once the workqueues are thawed?

Thanks.

-- 
tejun