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

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Message-ID: <ZRcFR6Tf-9QzfbnD@google.com>
Date:   Fri, 29 Sep 2023 10:11:35 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Haitao Shan <hshan@...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.

On Fri, Sep 29, 2023, Haitao Shan wrote:
> 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.

It's tagged for stable, so it'll get automatically selected/backported for stable
kernels so long as the patch applies cleanly.  That won't include 6.3 or 6.4
because those are already end-of-life, i.e. not LTS kernels, and not the most
recent release.

If the patch doesn't apply cleanly, e.g. I highly doubt it'll apply as-is for 5.15,
then someone has to do a manual backport, where "someone" can be anyone.  Sometimes
that's a maintainer, but just as often it's someone that really cares about fixing
something in a particular kernel.