linux-kernel - Re: [PATCHv3 1/2] cpu/hotplug: Keep cpu hotplug disabled until the rebooting cpu is stable

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Message-ID: <87bkw7rn0o.ffs@tglx>
Date:   Mon, 09 May 2022 12:57:59 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Pingfan Liu <kernelfans@...il.com>, linux-kernel@...r.kernel.org
Cc:     Pingfan Liu <kernelfans@...il.com>,
        Eric Biederman <ebiederm@...ssion.com>,
        Peter Zijlstra <peterz@...radead.org>,
        Valentin Schneider <valentin.schneider@....com>,
        Vincent Donnefort <vincent.donnefort@....com>,
        Ingo Molnar <mingo@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        YueHaibing <yuehaibing@...wei.com>,
        Baokun Li <libaokun1@...wei.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Baoquan He <bhe@...hat.com>, kexec@...ts.infradead.org
Subject: Re: [PATCHv3 1/2] cpu/hotplug: Keep cpu hotplug disabled until the
 rebooting cpu is stable

On Mon, May 09 2022 at 12:55, Thomas Gleixner wrote:
> On Mon, May 09 2022 at 12:13, Pingfan Liu wrote:
>> -		cpu_hotplug_enable();
>
> This is tinkering at best. Can we please sit down and rethink this whole
> machinery instead of applying random duct tape to it?

That said, I still have not figured out which real world problem you are
actually trying to solve.

Thanks,

        tglx