linux-kernel - Re: [PATCH AUTOSEL for 4.14 006/100] KVM: nVMX/nSVM: Don't intercept #UD when running L2

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Date:   Fri, 26 Jan 2018 10:34:25 +0100
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Alexander Levin <Alexander.Levin@...rosoft.com>
Cc:     Liran Alon <liran.alon@...cle.com>,
        konrad wilk <konrad.wilk@...cle.com>, stable@...r.kernel.org,
        rkrcmar@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH AUTOSEL for 4.14 006/100] KVM: nVMX/nSVM: Don't intercept
 #UD when running L2

On Thu, Jan 25, 2018 at 11:35:11AM -0500, Paolo Bonzini wrote:
> 
> > > Just wanted stable maintainers to note that Jim, Paolo & myself decided
> > > eventually to revert this commit along with commit ae1f57670703 on
> > > upstream KVM. However, it is true that this commit makes commit
> > > ae1f57670703 more complete. Therefore we have 2 options here:
> > > 1) Apply this backport and sometime in the future also apply the reverts of
> > > both these commits with Paolo's commit which reverts them.
> > 
> > Being "bug compatible" is good, I like that option :)
> 
> It's not even a bug, just different behavior and in the end it turns out to be
> less surprising if we revert.  So even better. :)
> 
> > When is the revert patch going to hit Linus's tree?  During the 4.16-rc1
> > merge window?
> 
> It's already there, commit ac9b305caa.  But since this one was not marked
> for stable, ac9b305caa wasn't either.

Ok, Sasha can you pick up both of these patches as well?  That way we
end up in sync with what is in Linus's tree.

thanks,

greg k-h