[Crash-utility] Re: crash with Xen dom0 image from kdump

Kazuo Moriwaka wrote: > Hello, > > From: Dave Anderson <anderson(a)redhat.com&gt; > Subject: Re: crash with Xen dom0 image from kdump > Date: Wed, 31 May 2006 16:20:15 -0400 > > > > > Hey guys, > > > > I've got the vmcore file from which Kazuo generated the > > "simulated" xendump dumpfile. I have a question regarding > > the makeup of the the vmcore file -- are the physical addresses > > referred to by each PT_LOAD segment based upon: > > > > 1. machine addresses, or > > 2. pseudo-physical addresses as perceived by the dom0 vmlinux kernel? > > > > Dave > > It's 1. > vmcore is made by kexec-ed linux kernel (not on xen, but on machine) kdump. > The kernel doesn't know about xen or domains except register info. > Register info is for dom0. > Ok, good... Next question -- how did you find dom0's phys_to_machine_mapping[] array from the vmcore in order to create the xendump?

> p.s. > Do you have any plan to support xen hypervisor itself with crash? > If there's, I want to help it. > I don't -- at least at this time. (My next primary task is to get crash working with x86 PAE kernels.) But it would be an interesting project to undertake. I'm not sure whether or how it would cleanly fit into the crash source code, or whether it should be an executable of its own. But by all means, if you want to undertake the task, be my guest!