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 ? > 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. Well, at least is would be nice to have one for -rt. Thanks, tglx -- 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
