Thomas Gleixner wrote: > The i8254/i8259 locks need to be real spinlocks on preempt-rt. Convert > them to raw_spinlock. No change for !RT kernels. Doesn't fly for -rt anymore: pic_irq_update runs under this raw lock and calls kvm_vcpu_kick which tries to wake_up some thread -> scheduling while atomic. This used to work up to 956f97cf. -rt for 2.6.31 is not yet affected, but 2.6.33 should be broken (haven't checked, using kvm-kmod over 2.6.31 ATM). I can provide a patch that restores the deferred kicking if it's acceptable for upstream. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- 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
