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SubjectRe: [PATCH 0/3] KVM: X86: Single target IPI fastpath enhancement
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On 26/03/20 03:19, Wanpeng Li wrote:
> The original single target IPI fastpath patch forgot to filter the
> ICR destination shorthand field. Multicast IPI is not suitable for
> this feature since wakeup the multiple sleeping vCPUs will extend
> the interrupt disabled time, it especially worse in the over-subscribe
> and VM has a little bit more vCPUs scenario. Let's narrow it down to
> single target IPI. In addition, this patchset micro-optimize virtual
> IPI emulation sequence for fastpath.
>
> Wanpeng Li (3):
> KVM: X86: Delay read msr data iff writes ICR MSR
> KVM: X86: Narrow down the IPI fastpath to single target IPI
> KVM: X86: Micro-optimize IPI fastpath delay
>
> arch/x86/kvm/lapic.c | 4 ++--
> arch/x86/kvm/lapic.h | 1 +
> arch/x86/kvm/x86.c | 14 +++++++++++---
> 3 files changed, 14 insertions(+), 5 deletions(-)
>

Queued 2 for 5.6 and 1-3 for 5.7, thanks.

Paolo

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