linux-kernel - Re: [BISECTED] 5.12 hangs at reboot

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Date:   Mon, 26 Apr 2021 21:29:25 +0200
From:   Harald Arnesen <harald@...gtun.org>
To:     Linus Torvalds <torvalds@...ux-foundation.org>
Cc:     johannes.berg@...el.com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [BISECTED] 5.12 hangs at reboot

Linus Torvalds [26.04.2021 20:59]:

> On Mon, Apr 26, 2021 at 11:47 AM Harald Arnesen <harald@...gtun.org> wrote:
>>
>> Bisected to commit 776a39b8196dbca4afb69669db0d9926ffac29ab, and
>> reverting this makes the machine reboot as usual.
> 
> Hmm. That was already in rc1, so this isn't some late untested
> last-minute commit that broke things for you.

As I said, I could not test the various rcs this time. I had to use the
machine for some work, so I did'nt want to experiment too much.

> Which implies that it's likely something fairly specific to  your
> setup (either the config or the hardware - or possibly Void Linux
> doing something other distros don't).

Init system is runit, not systemd? Could that affect something?

> Mind also attaching a dmesg of an affected kernel (or with the revert
> in place, I guess - it shouldn't matter until the reboot ;)

dmesg from 5.12 without the revert is attached.

> There's a lockdep assertion there, but you don't seem to have lockdep
> enabled. So it be interesting to see what happens if you
> 
>  (a) enable lockdep

Will report when I have tried it.

>  (b) make sure to reboot in text mode so that any lockdep messages
> would actually be visible.
> 
> Maybe Johannes will go "Doh!" and see what's wrong.
> 
>                   Linus
> 

-- 
Hilsen Harald

View attachment "dmesg.txt" of type "text/plain" (64075 bytes)