On (10/25/12 09:06), Frederic Weisbecker wrote:
> >> > My understanding is (I may be wrong) that we can schedule() from ptrace chain to
> >> > some arbitrary task, which will continue its execution from the point where RCU assumes
> >> > CPU as not idle, while CPU in fact still in idle state -- no one said rcu_idle_exit()
> >> > (or similar) prior to schedule() call.
> >>
> >> Yeah but when we are in syscall_trace_leave(), the CPU shouldn't be in
> >> RCU idle mode. That's where the bug is. How do you manage to trigger
> >> this bug?
> >>
> >
> > strace -f <anything>
> 
> I can't reproduce. Can you send me your config?
> 

sure, attached.


	-ss