Comment 23 for bug 1304001

I would like to reproduce this first and for that I will need at least config file that is used for launching the guest ('memory' and 'maxmem' for sure but having the whole file would be better) as well as guest's kernel config file. Knowing what xen boot options are as well as if there is anything "interesting" in /etc/xen/{xl.conf|xend-config.sxp} may also be helpful.

But seeing debug output definitely won't hurt. In fact, add 'debug loglevel=8 memblock=debug' to boot line for good measure (I hope it won't be too much output).