Re: Re: [PATCH] Remove process freezer from suspend to RAM pathway

Pavel Machek
2007-07-07T07:56:30Z

Hi!

> > How will that help? Block the kernel thread in the freezer or block it
> > in the driver -- either way it is blocked. So how do your deadlocks
> > get resolved?
>
> Because nobody is waiting on that kernel thread anyway without a freezer
> so there is no deadlock anymore.

In the deadlock we are seeing, _someone_ is waiting on userspace
thread, that leads to deadlock with freezer. We don't know who,
because we have not seen the sysrq-t dumps.

The "unknown who" will deadlock on fused frozen by driver, too. We
really need to fix the "unknown who" here.
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html