RE: [Xen-devel] Xen doesnt recognize my root fs, while native kernel can ???

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: Jun Koi [mailto:junkoi2004@xxxxxxxxx] 
> Sent: 13 June 2007 10:37
> To: Petersson, Mats
> Cc: Keir Fraser; xen-devel
> Subject: Re: [Xen-devel] Xen doesnt recognize my root fs, 
> while native kernel can ???
> 
> On 6/13/07, Petersson, Mats <Mats.Petersson@xxxxxxx> wrote:
> >
> >
> > > -----Original Message-----
> > > From: Jun Koi [mailto:junkoi2004@xxxxxxxxx]
> > > Sent: 13 June 2007 10:22
> > > To: Petersson, Mats
> > > Cc: Keir Fraser; xen-devel
> > > Subject: Re: [Xen-devel] Xen doesnt recognize my root fs,
> > > while native kernel can ???
> > >
> > > Here is the screenshot taken with a digital camera. I 
> hope the screen
> > > is clear enough for you to see.
> >
> > It seems like it's loading the driver for that disk and 
> recognising it,
> > which leaves two possible likely options:
> 
> > 1. You don't have the filesystem driver for the fs on the /dev/sda2
> > 2. You don't have "/dev/sda2" although the driver for it is loaded
> > [maybe you need something like udev installed to create the device?]
> >
> 
> OK, but why the same kernel option with native kernel boots my machine
> well? It detects the same /dev/sda2.
> 
> Do you see my point?

I do see your point. I'm just following the evidence on your screen -
which of course may be misleading, but without further information of
some sort, that's what the current evidence shows. I just realized that
Keir has spotted the REAL problem in this case tho'. 

Note that different distributions have different add-ons (extra patches
to the kernel itself) in the kernel that they distribute. Xen uses the
standard kernel.org kernel, and there is sometimes a difference in that.

As a side not (in regards to the comments about using initrd), I have
found that there's less problems with that approach than using "kernel
builtin", simply for the reason that I don't have to figure out which
parts I need to compile in on a particular machine to make it work -
instead, I create an initrd on the machine I use Xen, and select
(almost) all different drivers and filesystems as my config. Since
unused modules only take up a bit of disk-space (and I usually have a
large enough disk that a few megabytes doesn't really matter much), I
don't have to select just the right ones.


--
Mats
> 
> Thanks,
> Jun
> 
> 
> 



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