linux-kernel - Re: [PATCH v3] KVM: x86: Fix lapic timer interrupt lost after loading a snapshot.

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Message-ID: <CAGD3tSxPDVb9sN1g+gTV5SykY57Szpx1SjEcmHJvK62u1fiXmA@mail.gmail.com>
Date:   Fri, 29 Sep 2023 09:31:07 -0700
From:   Haitao Shan <hshan@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, kvm@...r.kernel.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        "H. Peter Anvin" <hpa@...or.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] KVM: x86: Fix lapic timer interrupt lost after loading
 a snapshot.

Thank you very much.

I do have one more question. Is this fix going to be backported to
v6.3, v6.4, etc? Or perhaps that will be a decision made by other
maintainers? The reason for such a question is to decide whether we
have to keep the workaround for certain kernel versions.


On Thu, Sep 28, 2023 at 7:20 PM Sean Christopherson <seanjc@...gle.com> wrote:
>
> On Tue, 12 Sep 2023 16:55:45 -0700, Haitao Shan wrote:
> > When running android emulator (which is based on QEMU 2.12) on
> > certain Intel hosts with kernel version 6.3-rc1 or above, guest
> > will freeze after loading a snapshot. This is almost 100%
> > reproducible. By default, the android emulator will use snapshot
> > to speed up the next launching of the same android guest. So
> > this breaks the android emulator badly.
> >
> > [...]
>
> Applied to kvm-x86 apic, thanks!
>
> [1/1] KVM: x86: Fix lapic timer interrupt lost after loading a snapshot.
>       https://github.com/kvm-x86/linux/commit/9cfec6d097c6
>
> --
> https://github.com/kvm-x86/linux/tree/next



-- 
Haitao @Google