On Wed, Jun 14, 2006 at 01:01:18PM +0300, Markus Kovero wrote:
> Hi there, I've encoutered intresting problem. I'm running linux Domain0 
> and two NetBSD DomainU's. After upgrading to Xen3 there is constant high 
> IRQ load on both NetBSD domainU's which did not happen before. It causes 
> major slowdown on DomainU's
> 
> http://staff.fiveam.org/mrtg/irq.html there you can see mrtg graph how 
> it peaked to over 8000 IRQ requests per second after upgrading to Xen3.
> Loads are considerably high but CPU idle is 100%.
> What might be causing this problem?

Could you try a current kernel ? I havn't had time to look at this but
someone else reported here that current kernels don't have this issue.
It's just as a data point, I'll try to get netbsd-3 fixed in not too long.

-- 
Manuel Bouyer <bouyer@antioche.eu.org>
     NetBSD: 26 ans d'experience feront toujours la difference
--