ZFS + FreeBSD XEN dom0 panic

Hello,

I've been trying to make a stable XEN virtualization system with FreeBSD as
Dom0. The problem is that at some point system panics (normal,
non-stressful use-case), i have somehow found scripts and setups with witch
i can provoke panic sooner.

I have reported bug at
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=261059 with as detailed
info as i could gather, including some of panic stack backtraces.

In short - is anyone using ZFS + XEN + FreeBSD as Dom0 as a stable system?
Can someone share his configuration or ideas, so i can try out? I've been
experimenting with iSCSI as well, but it seems that at some setups the disk
speed is really slow, and sometimes system panics as well, so i was going
for the simplest setup.

Other question, what could i do to help to solve the issues i have found in
bug 261059? More verbosity flags, some other debugging files, locations?

Thank you!