On Mon, Aug 13, 2012 at 12:34:32PM +0300, Michael S. Tsirkin wrote:
> On Mon, Aug 13, 2012 at 12:16:46PM +0300, Gleb Natapov wrote:
> > Here is a quick prototype of what we discussed yesterday. This one
> > caches only MSI interrupts for now. The obvious problem is that not
> > all interrupts (namely IPIs and MSIs using KVM_CAP_SIGNAL_MSI) use irq
> > routing table, so they cannot be cached.
>
> I thought this means ID changes need to replace the routing table, no?
>
Correct. This is missing from the patches, but as I said this is just
prototype to see if it is feasible. What this prototype shows is that we
have problems with IPIs and MSIs from userspace.
> >
> > Gleb Natapov (2):
> > Call irq_rt callback under rcu_read_lock()
> > Cache msi irq destination.
> >
> > arch/x86/kvm/lapic.c | 2 +-
> > include/linux/kvm_host.h | 1 +
> > virt/kvm/ioapic.c | 2 +-
> > virt/kvm/ioapic.h | 3 ++-
> > virt/kvm/irq_comm.c | 37 ++++++++++++++++++++-----------------
> > 5 files changed, 25 insertions(+), 20 deletions(-)
> >
> > --
> > 1.7.10.4
--
Gleb.
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