Re: [PATCH] tracing: use raw spinlocks instead of spinlocks

[Frédéric Weisbecker]

2008/11/3 Ingo Molnar <mingo@xxxxxxx>:
> Frederic, do you have trouble finding the source of the deadlock? In
> theory the NMI watchdog should be able to punch through it. (if not
> then we need to improve things so that it can)

Ok...actually I still have a deadlock. Or it seems to. I launch the
return tracer and then...the system
can block after several seconds, typically after I try to write some
characters on the terminal.

It happens more easily on SMP.

I enabled all I could for lock debugging, but I don't have any errors printed...
Lockdep uses an NMI wachdog?
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