On Thu, Nov 18, 2010 at 11:30:47AM +0200, Avi Kivity wrote: > >> > >> *entry may be stale after rcu_read_unlock(). Is this a problem? > > > >I suppose not. All MSI-X MMIO accessing would be executed without delay, so no re- > >order issue would happen. If the guest is reading and writing the field at the same > >time(from two cpus), it should got some kinds of sync method for itself - or it > >may not care what's the reading result(like the one after msix_mask_irq()). > > I guess so. Michael/Alex? This is kvm_get_irq_routing_entry which is used for table reads, correct? Actually, the pci read *is* the sync method that guests use, they rely on reads to flush out all previous writes. > -- > error compiling committee.c: too many arguments to function -- 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
