Subject: Re: Netbsd XEN nothing I can boot in
To: Ivan Vari <firstname.lastname@example.org>
From: Manuel Bouyer <email@example.com>
Date: 09/15/2006 11:53:27
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
> 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
NetBSD: 26 ans d'experience feront toujours la difference