Re: [Xen-devel] [PATCH 0/3] domUloader

[Anthony Liguori <aliguori@xxxxxxxxxx>]

On a side note, one thing we all have to think about is how a boot 
loader would work with something like a virtual framebuffer.
It may be time to start thinking about writing a first class domU 
bootloader.  Something that just sets up a page table that maps the pfns 
linearly and enough XenBus to read from a virtual disk.  We can reuse 
code from grub for filesystem parsing (or even write it from 
scratch--it's not that hard to just read from a filesystem).
We could also use mini-OS as a base.

Regards,

Anthony Liguori

Kurt Garloff wrote:

> Hi Jeremy,
>
> On Wed, Jan 18, 2006 at 01:06:04PM -0500, Jeremy Katz wrote:
>  
>
> > The other concern with mounting is that there have been some cases where
> > changes to filesystems have broken reading new filesystems with older
> > kernels.  It's a lot easier to get the library that supports more (and
> > less has to be supported, so you're less likely to need to make changes)
> > than to upgrade your kernel for dom0
> >    
> I tend to disagree.
> As the dom0 kernel drives the hardware and hardware drivers seems
> to be the more prominent reason for moving to new kernel versions,
> I would assume the dom0 kernel to be updated more likely than the
> domU kernels.
> And actually, filesystem forward compatibility is not that bad.
>
> I'm not saying this can't be an issue, but I suspect it won't be
> for most people.
>
> Cheers,
>  

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