Re: RCU stall in af_unix.c, should use spin_lock_irqsave?

Thomas Petazzoni
2014-10-21T10:13:10Z

Dear Hannes Frederic Sowa,

On Tue, 21 Oct 2014 12:08:52 +0200, Hannes Frederic Sowa wrote:
> On Di, 2014-10-21 at 10:03 +0200, Thomas Petazzoni wrote:
> > So, the question is: is this patch the correct solution (but then other
> > usage of spin_lock in af_unix.c might also need fixing) ? Or is the
> > network driver at fault?
>
> It feels like a false positive. Do you see one core spinning tightly on
> a lock? Does the system get unusable?

Interrupts are still enabled (for example, sysrq are still working),
but scheduling no longer takes place (all processes are blocked).

Best regards,