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Date:   Tue, 17 Sep 2019 19:30:29 +0100
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Richard Weinberger <richard.weinberger@gmail.com>
Cc:     Stefan Hajnoczi <stefanha@redhat.com>, virtio-fs@redhat.com,
        Miklos Szeredi <mszeredi@redhat.com>,
        David Howells <dhowells@redhat.com>,
        linux-fsdevel <linux-fsdevel@vger.kernel.org>,
        Vivek Goyal <vgoyal@redhat.com>
Subject: Re: [PATCH] init/do_mounts.c: add virtiofs root fs support
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On Tue, Sep 17, 2019 at 08:19:55PM +0200, Richard Weinberger wrote:

> mtd, ubi, virtiofs and 9p have one thing in common, they are not block devices.
> What about a new miscroot= kernel parameter?

How about something like xfs!sda5 or nfs!foo.local.net/bar, etc.?  With
ubi et.al. covered by the same syntax...