Re: Netbsd XEN nothing I can boot in

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Sep 15, 2006 at 02:46:11PM +1200, Ivan Vari wrote:
> >I'm not sure it's NetBSD, or if it's an issue with the way this box reports
> >its memory and Xen. The NetBSD kernel trusts what Xen tells him about 
> >useable
> >memory.
> 
> Thanks for the explanation Manuel. Some more problems though...
> I have my first 3.1RC2 candidate running, nothing special. Strictly 
> minimal install, no games, X11 on 10GB LVM for xbd0a. Everything is on 
> separated slice inside of the block device 1GB /home, 4GB /usr, 512M /, 
> 2Gb /var, 2GB /tmp,  1GB swap and 64M for mfs.
> 
> I followed the howto from wiki.xensource.com and copied across the xbd* 
> and rxbd* devices after install as suggested.

Not sure what you mean here

> 
> Now after I boot the VM in (using the netbsd-XEN3_DOMU kernel now) I can 
> log in but the VM stops responding after round about 5 minutes. Whatever 
> I do it happens after 5 min no excuse.
> 
> On another console logged into the dom0 xm top shows that the allocated 
> 512M is being chewed up, the CPU is 100%. Because of this my desktop is 
> also becoming non responsive and starts swapping like nuts. Obviously I 
> log into the dom0 via ssh and start the VM from there but it should not 
> be an issue I suppose.

I don't understant what you mean here. Is the Xen box you desktop too ?
Otherwise how could a ssh session make your desktop swap ?
When you says the CPU is 100%, is it dom0's CPU or domU's CPU ?

Hum, someone on this list posted a note about a similar issue; if the dom0
CPU is at 100% the domU can hang. This is a property of the default
Xen's scheduler parameters. Changing this to have a non-0 minimum time slice
for domUs helps.

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--