linux-kernel - Re: [PATCH 00/21] Initial cleanups for vCPU hotplug

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Date:   Fri, 01 Dec 2023 09:53:13 +0100
From:   Thomas Gleixner <tglx@...utronix.de>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>,
        linux-pm@...r.kernel.org, loongarch@...ts.linux.dev,
        linux-acpi@...r.kernel.org, linux-arch@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-riscv@...ts.infradead.org, kvmarm@...ts.linux.dev,
        x86@...nel.org, linux-csky@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-ia64@...r.kernel.org,
        linux-parisc@...r.kernel.org
Cc:     Albert Ou <aou@...s.berkeley.edu>, Borislav Petkov <bp@...en8.de>,
        Catalin Marinas <catalin.marinas@....com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Guo Ren <guoren@...nel.org>, "H. Peter Anvin" <hpa@...or.com>,
        Huacai Chen <chenhuacai@...nel.org>,
        Ingo Molnar <mingo@...hat.com>,
        James Morse <james.morse@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        jianyong.wu@....com, justin.he@....com,
        Len Brown <lenb@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Peter Zijlstra <peterz@...radead.org>,
        "Rafael J. Wysocki" <rafael@...nel.org>,
        Salil Mehta <salil.mehta@...wei.com>,
        Sudeep Holla <sudeep.holla@....com>,
        WANG Xuerui <kernel@...0n.name>, Will Deacon <will@...nel.org>
Subject: Re: [PATCH 00/21] Initial cleanups for vCPU hotplug

On Tue, Nov 21 2023 at 13:43, Russell King wrote:
> The majority of the other patches come from the vCPU hotplug RFC v3
> series I posted earlier, rebased on Linus' current tip, but with some
> new patches adding arch_cpu_is_hotpluggable() as the remaining
> arch_register_cpu() functions only differ in the setting of the
> hotpluggable member of the CPU device - so let's get generic code
> doing that and provide a way for an architecture to specify whether a
> CPU is hotpluggable.
>
> This patch series has been updated as best I can from the comments on
> its previous 22-patch posting, but there are some things that I have
> been unable to address (some of which go back to James' posting of
> RFC v2 of the vcpu hotplug series) due to lack of co-operation from
> either reviewers responding to my questions, or from the patch author
> providing information. I have now come to the conclusion that this
> information is never going to come, but there is still benefit to
> moving forward with this patch set. I don't expect that anyone will
> even bother to read this far down the email, so blah blah blah blah
> blah blah blah blah blah. I bet no one reads this so I don't know why
> I bother writing crud like this.

You lost your bet. I always read cover letters completely because they
tell a lot. There is correlation between the amount of blah and the
quality of the series :)

Thanks,

        tglx