> > 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.
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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