Fedora xen - Dec 2006 - resize domU

Hi gurus

I have setup XEN using FC6 and used raw disk as disk storage for DomU
instead of using disk image.

I have already resize the LV on Dom0 which DomU uses and restarted DomU but
still DomU sees the old size..

I would like to ask help on the procedure on resizing DomU

Thanks much