Re: CPU Lockups in KVM with deferred hrtimer rearming

Jim Mattson
2026-04-21T23:34:43Z

On Tue, Apr 21, 2026 at 4:16 PM Paolo Bonzini <pbonzini@redhat.com> wrote:
> ...
> There were two different steps. Posted interrupt support on the CPU
> was introduced in Ivy Bridge. Posted interrupt support on the IOMMU in
> Broadwell (and added to KVM with commit efc644048ecd, "KVM: x86:
> Update IRTE for posted-interrupts", 2015-10-01). New virt features
> used to come on the "tock" instead of the "tick").

Nit: I believe posted interrupts were only introduced in the higher
end Ivy Town parts, but I could be wrong. :)