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Groups > linux.kernel > #1542784
| From | Paolo Bonzini <pbonzini@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT |
| Date | 2016-12-15 15:40 +0100 |
| Message-ID | <sOFmp-6RD-33@gated-at.bofh.it> (permalink) |
| References | <sOfrX-5qN-25@gated-at.bofh.it> <sOqdH-5Va-3@gated-at.bofh.it> <sOFmp-6RD-35@gated-at.bofh.it> <sOFmp-6RD-37@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 15/12/2016 15:30, Radim Krčmář wrote:
>
> One useless round of KVM_REQ_EVENT is not going change nested
> performance by much and it is not the only thing we could improve wrt.
> TPR ... I would just leave it for now and take care of it when we
> * don't to update PPR at all with APICv -- it is already correct
> * drop the KVM_REQ_EVENT with flex priority, because lower TPR cannot
> unmask an interrupt
I agree. I still don't like the patch very much, because I feel like an
explicit state machine ("can KVM_REQ_EVENT do anything?") would be more
maintainable. But if I don't come up with anything we'll go with this
patch.
Paolo
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[PATCH v2] KVM: x86: avoid redundant REQ_EVENT Denis Plotnikov <dplotnikov@virtuozzo.com> - 2016-12-14 12:00 +0100
Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT Radim Krčmář <rkrcmar@redhat.com> - 2016-12-14 22:40 +0100
Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT Paolo Bonzini <pbonzini@redhat.com> - 2016-12-14 23:30 +0100
Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT Radim Krčmář <rkrcmar@redhat.com> - 2016-12-15 15:40 +0100
Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT Paolo Bonzini <pbonzini@redhat.com> - 2016-12-15 15:40 +0100
Re: [PATCH v2] KVM: x86: avoid redundant REQ_EVENT Paolo Bonzini <pbonzini@redhat.com> - 2016-12-18 22:10 +0100
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