Avi Kivity <avi@xxxxxxxxxx> writes: > On 05/03/2011 12:36 PM, Avi Kivity wrote: >> >>> I don't know about live migration of kvm. If we said the wiring is like >>> figure 5-2, what is required for the live migration? It was required >>> only if IMCR was required? >> >> The issue with live migration is that we can't change the running >> configuration while the system is running, like adding the IMCR or >> changing the wiring. The hardware will be programmed for the old >> configuration and will likely fail with the new one. For example, the >> current wiring has the PIT output wired to PIC IRQ0 and IOAPIC INTI0; >> we need to change it to IOAPIC INTI2 instead. >> > > btw, I believe that the configuration currently implemented is legal > (it's similar to config 7 in table 5-2 of the mpspec); the only problem > is that it can't support the NMI watchdog through the I/O APIC trick, > yet we allow it through a hack. I'm confused a bit. "config 7 in table 5-2" says PIT output wired to IOAPIC INTIN2. So, we don't need to change it? > Something we can do is connect the 8259A output to the I/O APIC INTIN2; > it should be masked so live migration will continue to work. We just > have to make sure that the guest is able to find that it is connected there. 8259A INTR to IOAPIC INTIN2 sounds strange. Isn't it IOAPIC INTIN0? Thanks. -- OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx> -- 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
