linux-kernel - Re: [RFC PATCH] rootfs: force mounting rootfs as tmpfs

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Date:   Wed, 31 Jan 2018 21:03:32 -0500
From:   Arvind Sankar <nivedita@...m.mit.edu>
To:     Rob Landley <rob@...dley.net>
Cc:     Mimi Zohar <zohar@...ux.vnet.ibm.com>,
        initramfs <initramfs@...r.kernel.org>,
        Taras Kondratiuk <takondra@...co.com>,
        Victor Kamensky <kamensky@...co.com>,
        linux-security-module <linux-security-module@...r.kernel.org>,
        Al Viro <viro@...IV.linux.org.uk>,
        linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [RFC PATCH] rootfs: force mounting rootfs as tmpfs

On Wed, Jan 31, 2018 at 05:48:20PM -0600, Rob Landley wrote:
> On 01/31/2018 04:07 PM, Mimi Zohar wrote:
> > On Wed, 2018-01-31 at 13:32 -0600, Rob Landley wrote:>> (The old "I configured in tmpfs and am using rootfs but I want that
> rootfs
> >> to be ramfs, not tmpfs" code doesn't seem to be a real-world concern, does
> >> it?)
> > 
> > I must be missing something.  Which systems don't specify "root=" on
> > the boot command line.
> 
> Any system using initrd or initramfs?
> 

Don't a lot of initramfs setups use root= to tell the initramfs which
actual root file system to switch to after early boot?