linux-kernel - Re: [PATCH v6 04/11] x86/smpboot: Reference count on smpboot_setup_warm_reset

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Date:   Tue, 7 Feb 2023 16:50:37 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     "Woodhouse, David" <dwmw@...zon.co.uk>,
        "usama.arif@...edance.com" <usama.arif@...edance.com>,
        "arjan@...ux.intel.com" <arjan@...ux.intel.com>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "thomas.lendacky@....com" <thomas.lendacky@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "fam.zheng@...edance.com" <fam.zheng@...edance.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "liangma@...ngbit.com" <liangma@...ngbit.com>,
        "pmenzel@...gen.mpg.de" <pmenzel@...gen.mpg.de>,
        "mimoja@...oja.de" <mimoja@...oja.de>,
        "hewenliang4@...wei.com" <hewenliang4@...wei.com>,
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        "bp@...en8.de" <bp@...en8.de>,
        "paulmck@...nel.org" <paulmck@...nel.org>,
        "rcu@...r.kernel.org" <rcu@...r.kernel.org>,
        "x86@...nel.org" <x86@...nel.org>
Subject: Re: [PATCH v6 04/11] x86/smpboot: Reference count on
 smpboot_setup_warm_reset_vector()

On Tue, Feb 07, 2023, Thomas Gleixner wrote:
> On Tue, Feb 07 2023 at 09:49, David Woodhouse wrote:
> > On Tue, 2023-02-07 at 00:48 +0100, Thomas Gleixner wrote:
> >> Aside of the 'We' this does not explain anything at all.
> >
> > Er, doesn't it?
> >
> > We refcount the warm reset vector because when we do parallel bringup,
> > we'll want to set it up once and then put it back to normal (for cold
> > reset) once all the CPUs are up.
> >
> > I can rework the phrasing; I'm aware that the whole nonsense about
> > pronouns and the imperative mood has grown legs in the last couple of
> > years since I originally wrote it — but is there anything actually
> > missing? 
> 
> We can settle the imperative mood debate over a beer at the next
> conference, but stuff which goes through tip is required to follow those
> rules. No exception for you :)

While we're reforming David, same goes for KVM x86.  :-)