linux-kernel - Re: boot regression on ppc64 with linux 6.2

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Message-ID: <87zg8dmt54.fsf@mpe.ellerman.id.au>
Date:   Thu, 16 Mar 2023 11:33:59 +1100
From:   Michael Ellerman <mpe@...erman.id.au>
To:     Andrea Righi <andrea.righi@...onical.com>
Cc:     Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Oleg Nesterov <oleg@...hat.com>, linuxppc-dev@...ts.ozlabs.org,
        linux-kernel@...r.kernel.org
Subject: Re: boot regression on ppc64 with linux 6.2

Andrea Righi <andrea.righi@...onical.com> writes:
> On Wed, Mar 15, 2023 at 02:30:53PM +1100, Michael Ellerman wrote:
>> Andrea Righi <andrea.righi@...onical.com> writes:
>> > I'm triggering the following bug when booting my qemu powerpc VM:
>> 
>> I'm not seeing that here :/
>> 
>> Can you give a bit more detail?
>>  - qemu version
>>  - qemu command line
>>  - what userspace are you using?
>>  - full dmesg of the failing case
>
> Yeah, ignore this for now, it could be related to another custom patch
> that I had applied (and forgot about it sorry), this one:
> https://lore.kernel.org/lkml/20230119155709.20d87e35.gary@garyguo.net/T/

OK. Did you do the bisect with that patch applied though?

> That is causing other issues on ppc64, so I think it might be related to
> that, I'll do more tests making sure I use a vanilla kernel.

I don't see an obvious connection between the modversions stuff and this
crash, but I guess it's possible.

cheers