linux-kernel - Re: regression: kernel panic: 9pnet_virtio: no channels available for device root

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Date:   Thu, 30 Sep 2021 16:39:43 +0200
From:   Christoph Hellwig <hch@....de>
To:     Anders Roxell <anders.roxell@...aro.org>
Cc:     Christoph Hellwig <hch@....de>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org
Subject: Re: regression: kernel panic: 9pnet_virtio: no channels available
 for device root

On Thu, Sep 30, 2021 at 11:25:45AM +0200, Anders Roxell wrote:
> Hi Christoph,
> 
> I've found a boot regression when ran my allmodconfig kernel on tag v5.15-rc1
> I've bisected it down to commit f9259be6a9e7 ("init: allow mounting
> arbitrary non-blockdevice filesystems as root"), see the bisect log
> [1].

Please try a kernel with:

"init: don't panic if mount_nodev_root failed" included.