linux-kernel - Re: Call Trace when adding vCPU to guest

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Message-ID: <87bk6h49tq.ffs@tglx>
Date: Wed, 10 Apr 2024 15:38:09 +0200
From: Thomas Gleixner <tglx@...utronix.de>
To: "Linux regression tracking (Thorsten Leemhuis)"
 <regressions@...mhuis.info>, Linux kernel regressions list
 <regressions@...ts.linux.dev>
Cc: LKML <linux-kernel@...r.kernel.org>, xiangfeix.ma@...el.com
Subject: Re: Call Trace when adding vCPU to guest

On Wed, Apr 10 2024 at 09:34, Linux regression tracking (Thorsten Leemhuis) wrote:
> Hi, Thorsten here, the Linux kernel's regression tracker.
>
> I noticed a report about a regression in bugzilla.kernel.org.
>
> Thomas, I wonder if it's caused by your topology changes. But it's just
> a wild guess and I might be totally wrong there, so feel free to ignore
> this mail. I already asked for a bit more log output and a bisection in
> the ticket.
>
> To quote from https://bugzilla.kernel.org/show_bug.cgi?id=218698
>
>> Environment:
>> 
>> Host OS: CentOS 9
>> Host kernel: 6.9.0-rc1
>> KVM commit: 9bc60f73
>> Qemu commit: e5c6528d
>> Guest kernel: 6.9-rc2
>> Guest commit: 39cd87c4eb2b893354f3b850f916353f2658ae6f
>> Guest repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>> 
>> 
>> Bug detail description: 
>> 
>> When hot adding a vCPU to the guest, the guest happens Call Trace and reboot.

https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/urgent&id=a9025cd1c673a8d6eefc79d911075b8b452eba8f

It'll be in rc4

Thanks,

        tglx