linux-kernel - Re: [PATCH v2 7/7] x86/resctrl: Determine if Sub-NUMA Cluster is enabled and initialize.

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Message-ID: <CALPaoChuVYpv2aEycaT85mf_2kyEpHcsKbaeZSEVP94i1QHTRw@mail.gmail.com>
Date:   Wed, 28 Jun 2023 15:43:27 +0200
From:   Peter Newman <peternewman@...gle.com>
To:     "Luck, Tony" <tony.luck@...el.com>
Cc:     "Yu, Fenghua" <fenghua.yu@...el.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        Jonathan Corbet <corbet@....net>,
        "x86@...nel.org" <x86@...nel.org>,
        Shaopeng Tan <tan.shaopeng@...itsu.com>,
        James Morse <james.morse@....com>,
        Jamie Iles <quic_jiles@...cinc.com>,
        Babu Moger <babu.moger@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-doc@...r.kernel.org" <linux-doc@...r.kernel.org>,
        "patches@...ts.linux.dev" <patches@...ts.linux.dev>
Subject: Re: [PATCH v2 7/7] x86/resctrl: Determine if Sub-NUMA Cluster is
 enabled and initialize.

Hi Tony,

On Mon, Jun 26, 2023 at 5:52 PM Luck, Tony <tony.luck@...el.com> wrote:

> Thanks for testing and review. Did you also test on one of your systems
> with a memory-only node? I recall that was an issue with my very first
> patch series.

It turns out the people who reported the crash to me were running an
experiment, but they were able to find one machine they hadn't yanked
the AEP DIMMs out of yet.

It was a cascade lake, so I had to yank the CPU family match check to
ensure that your fix was actually exercised. I can confirm now that it
booted successfully.

-Peter