Avi Kivity wrote: > On 02/24/2010 11:41 AM, Jan Kiszka wrote: >> Thomas Gleixner wrote: >> >>> On Tue, 23 Feb 2010, Jan Kiszka wrote: >>> >>> >>>> 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. >>>> >>> Hmm, a wakeup itself is fine. Is that code waking a wake queue ? >>> >> Yes, it's a wake queue. >> > > So what's the core issue? Is the lock_t in the wait_queue a sleeping mutex? Yep. Jan -- Siemens AG, Corporate Technology, CT T DE IT 1 Corporate Competence Center Embedded Linux -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
