linux-kernel - Re: + mm-fix-panic-in-__alloc_pages.patch added to -mm tree

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Message-ID: <alpine.DEB.2.22.394.2111161329010.79746@gentwo.de>
Date:   Tue, 16 Nov 2021 13:30:45 +0100 (CET)
From:   Christoph Lameter <cl@...two.de>
To:     Dennis Zhou <dennis@...nel.org>
cc:     Alexey Makhalov <amakhalov@...are.com>,
        Michal Hocko <mhocko@...e.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mm-commits@...r.kernel.org" <mm-commits@...r.kernel.org>,
        "osalvador@...e.de" <osalvador@...e.de>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>,
        "tj@...nel.org" <tj@...nel.org>
Subject: Re: + mm-fix-panic-in-__alloc_pages.patch added to -mm tree

On Mon, 15 Nov 2021, Dennis Zhou wrote:

> I need some clarification here. It sounds like memoryless nodes work on
> x86, but hotplug + memoryless nodes isn't a supported use case or you're
> introducing it as a new use case?

Could you do that step by step?

First add the new node and ensure everything is ok and that the memory is
online.

*After* that is done bring up the new processor and associate the
processor with *online* memory.