Thanks Jan, Andy and Andy
I shall try the Andy and Andy recommended approaches.
However before I do this I read the following message from the archives:
Notes for those moving to a pvops kernel (Debian lenny, Gentoo?, upstream)
http://lists.bitfolk.com/lurker/message/20080820.163101.70ccaa59.en.html
Is this still an issue with the Xen code that I need to be aware of?
cheers
Neil