I have the same behaviour with a Ubuntu domU under a Debian Lenny system, the kernel used is Debian's 2.6.26-2-xen-amd64. I provide a strace file of mountall as called by mountall.conf – the final line just keeps repeating. The whole strace file was over 100 MB but the last lines were all the same. So it seems stuck in a loop there.
I have the same behaviour with a Ubuntu domU under a Debian Lenny system, the kernel used is Debian's 2.6.26-2-xen-amd64. I provide a strace file of mountall as called by mountall.conf – the final line just keeps repeating. The whole strace file was over 100 MB but the last lines were all the same. So it seems stuck in a loop there.