linux-kernel - Re: [RFC PATCH] rootfs: Use tmpfs for rootfs even if root= is given

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Message-ID: <aa0074d1f0e33dc6f50e4f71a8fb7a19d319e96c.camel@linux.ibm.com>
Date:   Wed, 01 Nov 2023 10:31:13 -0400
From:   Mimi Zohar <zohar@...ux.ibm.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Stefan Berger <stefanb@...ux.ibm.com>
Cc:     Rob Landley <rob@...dley.net>, linux-kernel@...r.kernel.org,
        "Milton D. Miller II" <mdmii@...look.com>,
        Jeff Layton <jlayton@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Jim Cromie <jim.cromie@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        "H. Peter Anvin" <hpa@...or.com>
Subject: Re: [RFC PATCH] rootfs: Use tmpfs for rootfs even if root= is given

On Wed, 2023-11-01 at 15:28 +0100, Greg Kroah-Hartman wrote:
> On Wed, Nov 01, 2023 at 10:16:37AM -0400, Stefan Berger wrote:
> > 
> > 
> > On 11/1/23 07:35, Rob Landley wrote:
> > > On 10/31/23 11:56, Greg Kroah-Hartman wrote:
> > > > On Tue, Oct 31, 2023 at 11:44:17AM -0400, Stefan Berger wrote:
> > > > > rootfs currently does not use tmpfs if the root= boot option is passed
> > > > > even though the documentation about rootfs (added in 6e19eded3684) in
> > > > > Documentation/filesystems/ramfs-rootfs-initramfs.rst states:
> > > > > 
> > > > >    If CONFIG_TMPFS is enabled, rootfs will use tmpfs instead of ramfs by
> > > > >    default.  To force ramfs, add "rootfstype=ramfs" to the kernel command
> > > > >    line.
> > > > 
> > > > At this point in time, is there even any difference between ramfs and
> > > > tmpfs anymore?  Why would you want to choose one over the other here?
> > > 
> > > I submitted a patch to fix this to the list multiple times, which got ignored as
> > > always. Most recently here:
> > > 
> > > https://lore.kernel.org/lkml/8244c75f-445e-b15b-9dbf-266e7ca666e2@landley.net/
> > 
> > Everyone,
> > I now responded to Rob's patch over here:
> > https://lkml.org/lkml/2023/11/1/333
> 
> Note, we can't do anything with lkml.org links, they don't even work at
> times, please always use lore.kernel.org
> 
> Also, one patch out of a longer series also will not work as we can't
> pick it up from there either.
> 
> Can someone resend it, as a stand-alone patch, with the proper people
>  cc:ed and then we can handle that.  You all know this...

The initramfs@...r.kernel.org mailing list should be Cc'ed as well.

-- 
thanks,

Mimi