Hi, I found found that on my Powerpc machine there is some IO memory which will cause the box to hang if I read it. It's a custom device that was added to the board for a special purpose. I was looking for a way to exclude this memory from the dump, and while doing that I found that kexec makes a list of memory segments that go into the core file. I was wondering why most of the kexec architecture don't appear to exclude device memory like what's listed in /proc/iomem. Is there a good reason why that's not the case? Daniel