Re: Cannot see boot messages with DomU

[John Hayward <John.C.Hayward%wheaton.edu@localhost>]

Thanks Manuel!

I can now see the boot messages and sysinst!

Here is my experience:
I set memory on dom0 to 3500Mb - When I booted it complained about
not being able to see /proc/xen/baloon...

I had mounted the procfs on /usr/pkg/emul/linux/proc

I decreased the memory to 3000Mb and changed fstab to mouunt procfs on 
/proc and things started to work.

I went back an played with the memory and 512Mb works while 256Mb results
in an python error when doing xm create (different than the hang from
before).

I changed procfs back to /usr/pkg/emul/linux/proc but that appeared to
have no effect on the boot process.

I am under the impression that you want the dom0 to have a small
memory footprint so that extra memory can be allocated to domus.

It looks like for my situation 512Mb is a good value.

Thanks again for you help.
johnh...
On Mon, 11 Feb 2008, Manuel Bouyer wrote:

> Date: Mon, 11 Feb 2008 20:20:39 +0100
> From: Manuel Bouyer <bouyer%antioche.eu.org@localhost>
> To: John Hayward <John.C.Hayward%wheaton.edu@localhost>
> Subject: Re: Cannot see boot messages with DomU
>
> On Mon, Feb 11, 2008 at 01:05:26PM -0600, John Hayward wrote:
> > > Nothing obvious in xend.log. Do you see some guest output in the
> > > terminal where xm create -c is run ?
> > I see nothing (that is why I am at a loss as to what is wrong).
> >
> > > What is your hardware, and how much RAM does it have ?
> > It a dual core 2.66Ghz processor - there is a total of 4GB of memory.
>
> OK, maybe try reducing the amout of available RAM to Xen via
> the mem= option to the xen.gz line in grub. Set it to e.g. 3072M
> (I guess that with a 32bit system, you won't see much more anyway).
> I think there's a but in the 32bit hypervisor which shows up on some
> systems with more than 3GB or RAM (that is, more RAM than a 32bit system
> can address). I've seen it on a Dell PE2950 with 4GB, but I've no issue on
> supermicro systems with 4GB.
>
> --
> Manuel Bouyer <bouyer%antioche.eu.org@localhost>
>     NetBSD: 26 ans d'experience feront toujours la difference
> --

johnh...