Date: Mon, 16 Mar 2015 22:18:58 +0100
From: Natanael Copa <ncopa@alpinelinux.org>
To: Olivier Mauras <olivier@mauras.ch>
Cc: alpine-devel@lists.alpinelinux.org
Subject: Re: [alpine-devel] Fw: [alpine-aports] [Patch] mkinitfs - Support
 for root_type and root_options
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On Mon, 16 Mar 2015 21:30:58 +0100
Olivier Mauras <olivier@mauras.ch> wrote:

> 
> 
> On Mon, 2015-03-16 at 21:08 +0100, Natanael Copa wrote:
> > On Mon, 16 Mar 2015 17:39:48 +0000
> > Isaac Dunham <ibid.ag@gmail.com> wrote:
> > 
> > > On Mon, Mar 16, 2015 at 04:14:19PM +0100, Natanael Copa wrote:
> > > > On Mon, 16 Mar 2015 14:20:00 +0200
> > > > Olivier Mauras <olivier@mauras.ch> wrote:
> > > > 
> > > > >  
> > > > > 
> > > > > On 2015-03-16 12:36, Natanael Copa wrote: 
> > > > > 
> > > > > > I am forwarding a
> > > > > patch for mkinitfs from alpine-aports mailing list
> > > > > > for discussion.
> > > > > >
> > > > > 
> > > > > > I agree that we want support mounting p9 as root file system from
> > > > > > initramfs.
> > > > > > 
> > > > > > I would like to avoid to introduce 2 new boot options:
> > > > > root_type and
> > > > > > root_options.
> > > > > > 
> > > > > > Questions:
> > > > > > 
> > > > > > Can we implement this
> > > > > without introducing new boot options?
> > > > > > 
> > > > > > If not, how does other
> > > > > distros handle this? Do they have other boot
> > > > > > options for it?
> > > 
> > > > > FWIW, RHEL7 implements it
> > > > > in dracut with "root=virtfs:9p_name"
> > > > 
> > > > ok, this is an option we should consider.
> > > > 
> > > > > I just felt that having the options
> > > > > could be more useful - beyond 9p but i agree, is it needed ? - than
> > > > > hardcoding 9p support :)
> > > > 
> > > > we have root_size for tmpfs root which would correspond to
> > > > root_options="-s ..."
> > > > 
> > > > I agree it would be nice to avoid hardcoding every supported root type.
> > > > 
> > > > anyone know what debian, ubuntu, arch and gentoo does for 9p as root?
> > > > 
> > > > If the majority use root=virtfs:9p_name then we should maybe follow
> > > > that.
> > > 
> > > Here's something about adding 9p support to an initramfs applicable to
> > > Debian, if I understand correctly [1]:
> > > 
> > > Add the 9p modules to the host initramfs (that's the easiest way albeit not the cleanest, to have an initrd with the needed modules): 
> > > printf '%s\n' 9p 9pnet 9pnet_virtio | sudo tee -a /etc/initramfs-tools/modules
> > > sudo update-initramfs -u 
> > > 
> > > qemu -kernel "/boot/vmlinuz-$(uname -r)" \
> > >    -initrd "/boot/initrd.img-$(uname -r)" \
> > >    -fsdev local,id=r,path=/,security_model=none \
> > >    -device virtio-9p-pci,fsdev=r,mount_tag=r \
> > >    -nographic \
> > >    -append 'root=r ro rootfstype=9p rootflags=trans=virtio console=ttyS0 init=/bin/sh'
> > 
> > so, rootfstype and rootflags. I think we can use those instead of
> > root_type and root_options?
> > 
> > Thank you very much!
> > 
> > > 
> > > [1] http://unix.stackexchange.com/questions/90423/can-virtfs-9p-be-used-as-root-file-system
> > > 
> > > 
> > 
> > 
> > 
> > ---
> > Unsubscribe:  alpine-devel+unsubscribe@lists.alpinelinux.org
> > Help:         alpine-devel+help@lists.alpinelinux.org
> > ---
> 
> Want me to fix the patch with these ?

Would be nice. thanks

-nc


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