On Thu, 2010-07-22 at 21:44 -0700, Darren Hart wrote: > suggestion I updated the instrumentation to display the > local_save_flags and irqs_disabled_flags:
> Jul 22 23:36:58 igoort1 kernel: local flags: 0, irqs disabled: 1 > Jul 22 23:36:58 igoort1 kernel: before H_CEDE current->stack: > c00000010e9e3ce0, pcnt: 1 > Jul 22 23:36:58 igoort1 kernel: after H_CEDE current->stack: > c00000010e9e3ce0, pcnt: 1 > > I'm not sure if I'm reading that right, but I believe interrupts are > intended to be disabled here. If accomplished via the > spin_lock_irqsave() this would behave differently on RT. However, this > path disables the interrupts handled by xics, all but the IPIs anyway. > On RT I disabled the decrementer as well. > > Is it possible for RT to be receiving other interrupts here? Also you may want to call hard_irq_disable() to -really- disable interrupts ... since we do lazy-disable on powerpc Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
