The first start up of the REVESBY1 works well, but the subsequent start up of the VM image. I was unable to get around the problem, and decided not to proceed with this build.
The start of the VM fails with the following errors:
Parsing config file /OVS/running_pool/REVESBY1/vm.cfg
xc: error: do_evtchn_op: HYPERVISOR_event_channel_op failed: -1: Internal error
xc: error: do_evtchn_op: HYPERVISOR_event_channel_op failed: -1: Internal error
xc: error: panic: xc_dom_boot.c:159: xc_dom_boot_mem_init: can't allocate low memory for domain: Out of memory
libxl: error: libxl_dom.c:207:libxl__build_pv xc_dom_boot_mem_init failed: No such process
cannot (re-)build domain: -3
libxl: error: libxl.c:711:libxl_domain_destroy non-existant domain 18