linux-kernel - Re: [PATCH v6 4/5] x86/kvm: use __decrypted attribute in shared variables

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Message-ID: <alpine.DEB.2.21.1809101527030.1292@nanos.tec.linutronix.de>
Date:   Mon, 10 Sep 2018 15:29:58 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Sean Christopherson <sean.j.christopherson@...el.com>
cc:     Borislav Petkov <bp@...e.de>,
        Brijesh Singh <brijesh.singh@....com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        Tom Lendacky <thomas.lendacky@....com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Radim Krčmář <rkrcmar@...hat.com>
Subject: Re: [PATCH v6 4/5] x86/kvm: use __decrypted attribute in shared
 variables

On Mon, 10 Sep 2018, Sean Christopherson wrote:

> On Mon, 2018-09-10 at 14:04 +0200, Borislav Petkov wrote:
> > On Fri, Sep 07, 2018 at 12:57:29PM -0500, Brijesh Singh wrote:
> > > 
> > > Commit: 368a540e0232 (x86/kvmclock: Remove memblock dependency)
> > > caused SEV guest regression.
> > When mentioning a commit in the commit message, put it on a separate
> > line, like this:
> > 
> > "Commit
> > 
> >   368a540e0232 (x86/kvmclock: Remove memblock dependency)
> > 
> > caused a SEV guest regression."
> 
> Heh, that was the original formatting until I asked him to change it:
> https://lkml.org/lkml/2018/8/29/809.  Checkpatch throws an error if
> there's a newline after 'Commit'.  Though looking at this again, there
> shouldn't be a colon after 'Commit' and there should be quotes inside
> the parentheses, e.g. this satisfies checkpatch:
> 
> Commit 368a540e0232 ("x86/kvmclock: Remove memblock dependency")

The whole 5 lines of 'commit bla broke' are bogus to me. They convey not
really useful information and the commit line will repeat itself in the
Fixes: tag. So something like:

  The recent removal of the memblock dependency caused a SEV guest
  regression because bla....


  Fixes: 368a540e0232 ("x86/kvmclock: Remove memblock dependency")

Is much more useful than the above independent of its formatting.

Thanks,

	tglx