linux-kernel - Re: printk.time causes rare kernel boot hangs

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Message-ID: <20230614152239.GH7636@redhat.com>
Date:   Wed, 14 Jun 2023 16:22:39 +0100
From:   "Richard W.M. Jones" <rjones@...hat.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Aaron Thompson <dev@...ont.org>, linux-kernel@...r.kernel.org
Subject: Re: printk.time causes rare kernel boot hangs

On Wed, Jun 14, 2023 at 05:19:20PM +0200, Peter Zijlstra wrote:
> On Wed, Jun 14, 2023 at 04:07:17PM +0100, Richard W.M. Jones wrote:
> > On Wed, Jun 14, 2023 at 04:53:48PM +0200, Peter Zijlstra wrote:
> 
> > > Clearly I'm doing something wrong.
> > 
> > I'm suspecting version of qemu may have something to do with it, but
> > honestly I don't know.  Which qemu are you using?
> 
> ivb-ep: QEMU emulator version 7.2.0 (Debian 1:7.2+dfsg-3)
> adl: QEMU emulator version 7.2.0 (Debian 1:7.2+dfsg-1+b2)

We had a report that it occurred on qemu 7.0:
https://bugzilla.redhat.com/show_bug.cgi?id=2213346#c5

I didn't try qemu 7.2, but I've been using 8.0 in my tests.

I'm now trying (on Intel again) with qemu @ 7efd65423ab22e6f5890,
the latest version as of now.

> I'll try and upgrade the adl to 8.

Thanks,

Rich.

-- 
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