[libvirt] invoking qemu with -readconfig

Hi All, I was recently asked about the possibility of libvirt creating a config file and then invoking qemu with '-readconfig <file>' instead of passing all arguments on the command line. The primary reason for this request is a more readable ps output and the ability to inspect the arguments in a file (with one arg per line) instead of one long line. I was certain there was a similar request in the past, but haven't had much luck searching the mail archives or with google. Has this been discussed previously? If so, any pointers or summary of the outcome? If not, what are folks' opinion about this? Regards, Jim