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

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Message-ID: <20230614123745.GE7636@redhat.com>
Date:   Wed, 14 Jun 2023 13:37:45 +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 01:35:36PM +0200, Peter Zijlstra wrote:
> I've got that plain qemu thing running on:
> 
>   defconfig + kvm_guest.config + CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y

With this config I hit the bug locally after ~ 400 iterations.
However this is on an AMD host, and for some reason on Intel host the
bug is rarer (although it still happens).

Rich.

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