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.
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.
--
error compiling committee.c: too many arguments to function
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