With SLES9 SP4 we managed to set up a XEN PV DomU.
We are using SLES10 SP4 as Dom0 and DRBD 8 as disc-backed: a drbd-device corresponds to xvda in the DomU. The DomU uses the xenblk and xennet drivers, so everything seems ok.
We applied the last patches (EoL of SLES9 SP4 was on 31th of August). After live-migration to another Dom0 the DomU seems to crash. No reaction to SYSRQ, nothing on the console. DRBD switches from one side (primary) to the other, so the disk-backend does not seem to be a problem here. With CentOS 4/5, SLES 10/11 DomUs we never had an issue with live-migration. Even W2K3 works.
After destroy/create of the DomU it comes up without problems, last-log shows a "crash" entry.
Any hints are welcome...