linux-kernel - Re: [REGRESSION] mainline boot regression on AMD Stoney Ridge Chromebooks

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Date: Thu,  4 Apr 2024 17:23:17 +0200
From: Laura Nao <laura.nao@...labora.com>
To: tglx@...utronix.de
Cc: kernel@...labora.com,
	laura.nao@...labora.com,
	linux-kernel@...r.kernel.org,
	regressions@...mhuis.info,
	regressions@...ts.linux.dev,
	x86@...nel.org
Subject: Re: [REGRESSION] mainline boot regression on AMD Stoney Ridge Chromebooks

Hi Thomas,

On 4/4/24 15:05, Thomas Gleixner wrote:
> Laura!
> 
> On Thu, Apr 04 2024 at 15:01, Thomas Gleixner wrote:
>> On Thu, Apr 04 2024 at 10:24, Linux regression tracking wrote:
>>> On 28.03.24 12:50, Laura Nao wrote:
>>>>>
>>>>> I ran a manual bisection to track down the root cause for this
>>>>> regression and landed on the c749ce
>>>>> commit from this series:
>>>>> https://lore.kernel.org/all/20240212153625.145745053@linutronix.de/
>>>
>>> FWIW, that commit is c749ce393b8fe9 ("x86/cpu: Use common topology code
>>> for AMD") from tglx that was part of the "x86/cpu: Rework topology
>>> evaluation" series.
> 
> Can you please provide a boot dmesg from a 6.8 kernel and the output of
> 'cpuid' ?

Sure, here's the output from an Acer Chromebook Spin 311 R721T device:
- kernel log: https://pastebin.com/raw/NNbeJupE
- cpuid output: https://pastebin.com/raw/ThmGqnqG

This is with kernel v6.8 (e8f897f4afef0031fe618a8e94127a0934896aba), let
me know if you need the output from a different revision.

Thank you!

Laura