cc Frederic Weisbecker - context is here: http://marc.info/?l=linux-kernel&m=134749030206016&w=2 On Thu, 20 Sep 2012, Paul E. McKenney wrote: > Fair point. I am wondering whether there is some path into the idle > loop that somehow avoids telling RCU that the CPU has in face entered > idle. There needs to be an rcu_idle_enter() call on the way to idle, > otherwise RCU CPU stall warnings are expected behavior. As far as I know, our only idle entry point is in arch/arm/common/process.c:cpu_idle(). Looking at the x86 idle entry, they call rcu_idle_{enter,exit}() inside {stop,start}_critical_timings(). Making that change here didn't help. Also tried commenting out the code from the stop_critical_timings() call to the WARN_ON(irqs_disabled()), and adding a local_irq_enable(). That also didn't help, which suggests that the problem is not caused by the OMAP-specific PM idle code. - Paul -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
