linux-kernel - Re: system locks up with CONFIG

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Message-ID: <YjHYh3XRbHwrlLbR@zn.tnic>
Date:   Wed, 16 Mar 2022 13:31:03 +0100
From:   Borislav Petkov <bp@...en8.de>
To:     Jamie Heilman <jamie@...ible.transient.net>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: system locks up with CONFIG_SLS=Y; 5.17.0-rc

On Wed, Mar 16, 2022 at 09:51:35AM +0000, Jamie Heilman wrote:
> I've been (somewhat unsuccessfully) trying to bisect a hard lock-up
> of my workstation that occurs when I'm running 5.17 rc kernels a few
> seconds after I start a kvm guest instance.  There is no output to
> any log, everything locks up completely, sysrq doesn't even work
> anymore.

Any chance you can connect that box with a serial cable, get serial
console working and see if you can catch dmesg with it this way?

https://www.kernel.org/doc/html/latest/admin-guide/serial-console.html

Thx.

-- 
Regards/Gruss,
    Boris.

https://people.kernel.org/tglx/notes-about-netiquette