On Thu, 16 Jan 2014 18:45:36 +0100 Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote: > On Thu, Jan 16, 2014 at 12:18:24PM -0500, Steven Rostedt wrote: > > Didn't see anything horrible in there, so fine with me. > > Another thing I recently ran into was: > > local_irq_disable(); > preempt_disable(); > local_irq_enable(); > > local_irq_disable(); > preempt_enable(); > local_irq_enable(); > > I'm not sure any of our debugging catches that, I meant to extend > lockdep, but maybe it could also be hooked into something else. Hmm, what's wrong with the above? Note, the preemptirqsoff tracer will trace that as not being preemptible between that first local_irq_disable() to the local_irq_enable(). In fact, that's basically what the preemptirqsoff tracer was made for ;-) -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
