linux-kernel - Re: [PATCH v3 0/3] x86/cacheinfo: Set the number of leaves per CPU

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Message-ID: <20230912092300.GI603@alberich>
Date:   Tue, 12 Sep 2023 11:23:00 +0200
From:   Andreas Herrmann <aherrmann@...e.de>
To:     Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc:     x86@...nel.org, Andreas Herrmann <aherrmann@...e.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Chen Yu <yu.c.chen@...el.com>, Len Brown <len.brown@...el.com>,
        Radu Rendec <rrendec@...hat.com>,
        Pierre Gondois <Pierre.Gondois@....com>,
        Pu Wen <puwen@...on.cn>,
        "Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
        Sudeep Holla <sudeep.holla@....com>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Will Deacon <will@...nel.org>, Zhang Rui <rui.zhang@...el.com>,
        stable@...r.kernel.org, Ricardo Neri <ricardo.neri@...el.com>,
        "Ravi V. Shankar" <ravi.v.shankar@...el.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/3] x86/cacheinfo: Set the number of leaves per CPU

On Mon, Sep 11, 2023 at 08:23:50PM -0700, Ricardo Neri wrote:
> Hi Andreas,
> 
> Agreed. Testing is important. For the specific case of these patches, I
> booted CONFIG_PREEMPT_RT and !CONFIG_PREEMPT_RT kernels. Then I
>   a) Ensured that the splat reported in commit 5944ce092b97
>      ("arch_topology: Build cacheinfo from primary CPU") was not observed.
> 
>   b) Ensured that /sys/devices/system/cpu/cpuX/cache is present.
> 
>   c) Ensured that the contents /sys/devices/system/cpu/cpuX/cache is the
>      same before and after my patches.
> 
> I tested on the following systems: Intel Alder Lake, Intel Meteor
> Lake, 2-socket Intel Icelake server, 2-socket Intel Cascade Lake server,
> 2-socket Intel Skylake server, 4-socket Intel Broadwell server, 2-socket
> Intel Haswell server, 2-socket AMD Rome server, and 2-socket AMD Milan
> server.
> 
> Thanks and BR,
> Ricardo


Thanks for all the tests and info.

-- 
Regards,
Andreas

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