In Xen it is buggy, so I chose to not support it.
Well some versions of Xen are buggy, but not neccessarily all of them. IMHO we should support it in libvirt because it is a trivial change to make. This at least lets users try the functionality and see if there are bugs in their version of Xen
eg, our code already does
return xend_op(domain->conn, domain->name, "op", "dump", "file", filename, "live", "0", "crash", "0", NULL);
so it is easy to set "live", "1" based on flags
Well, the live dump implementation in xen is just bogus even upstream but I agree we should support it in xen driver because xen claims to support it and it's not our problem that their code for that is buggy. Furthermore they could fix it in the future and then it will just work. Jirka