linux-kernel - Re: [PATCH v2 0/4] mm, memory_hotplug: handle unitialized numa node gracefully

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Message-ID: <YdyiFq+A25Mg0odE@optiplex-lnx>
Date:   Mon, 10 Jan 2022 16:16:06 -0500
From:   Rafael Aquini <raquini@...hat.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Alexey Makhalov <amakhalov@...are.com>,
        LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org,
        Dennis Zhou <dennis@...nel.org>,
        Eric Dumazet <eric.dumazet@...il.com>,
        Oscar Salvador <osalvador@...e.de>, Tejun Heo <tj@...nel.org>,
        Christoph Lameter <cl@...ux.com>,
        Nico Pache <npache@...hat.com>
Subject: Re: [PATCH v2 0/4] mm, memory_hotplug: handle unitialized numa node
 gracefully

On Tue, Dec 14, 2021 at 11:07:28AM +0100, Michal Hocko wrote:
> Hi,
> this should be the full bundle for now. I have ended up with 4 patches.
> The primary fix is patch 2 (should be reasonably easy to backport to
> older kernels if there is any need for that). Patches 3 and 4 are mere
> clean ups.
>
> I will repost once this can get some testing from Alexey. Shouldn't be
> too much different from http://lkml.kernel.org/r/YbHfBgPQMkjtuHYF@dhcp22.suse.cz
> with the follow up fix squashed in.
> 
> I would really appreciate to hear more about http://lkml.kernel.org/r/YbMZsczMGpChaWz0@dhcp22.suse.cz
> because I would like to add that information to the changelog as well.
> 
> Thanks for the review and testing.
> 

FWIW, you can add my Acked-by on your repost Michal.

I reviewed your patches and tested them against that PPC crash on boot 
described at https://lore.kernel.org/all/YdxoXhTqCmVrT0R5@optiplex-fbsd/

Everything has worked like a charm, AFAICT.

Thank you for letting me know about these patches, and thanks for
working on them as a follow-up to that problem reported by Nico.

-- Rafael