Hello Itsuro, I understand that this facility can only be used in a xen development environment. However, I prefer to merge your patch as soon as possible. As far as I can tell your work is mostly complete, except for ia64 support. So I would presume that further changes will be relatively small updates to your current patch. Correct me if I am wrong. While working with your patch, one of the modifications I've done is to make it compile on architectures other than x86 and x86_64. In order to do that, I plan to #ifdef the hypervisor-only code such that it only gets compiled for architectures that support it, since there's no reason to have non-hypervisor architectures contain the hypervisor-only code. The manner in which you have structured the xen integration into the crash utility is very safe, and remarkably clean. So, unless you object, I will be merging it -- with a few modifications that I'm confident that you will not find objectionable -- and then your subsequent patches can be made against the most recent crash version. Thanks, Dave