Re: [Crash-utility] dom0cut script updated
Hi Dave,
From: Kazuo Moriwaka <moriwaka(a)valinux.co.jp>
Subject: Re: [Crash-utility] dom0cut script updated
Date: Wed, 13 Sep 2006 11:34:20 +0900 (JST)
Hi Dave,
> > Have you abandoned the idea of adding an ELF note (or some other
> > mechanism) for passing the "pfn_to_mfn_frame_list_list" mfn value
> > from the shared, per-domain, "arch_shared_info" structure(s)?
I talked with our kdump patch managers. They don't want to change
kernel level codes.. I'm sorry for I didn't tell this to you. I'll
talk with them again.
pfn_to_mfn_frame_list_list can included into ELF core :)
I think you need shared_info.arch.max_pfn, too, don't you?
> Furthermore -- if you could pass the
"pfn_to_mfn_frame_list_list" mfn
> values for all existing domains, it would be possible to bring up
> crash sessions for dom0, as well as for any of the domU's -- all
> with a single unmodified vmcore.
It sounds good.
Writing variable length data in ELF core header with kexec-tool is
difficult, because ELF core header length should be fixed when kexec loads
kdump kernel. It makes multiple domain support difficult by this technique.
Using domain_list and idle_pg_table (and follow domain list to find
domain) is one solution; but it needs to treat xen hypervisor address
space and xen data structures.
regards,
--
Kazuo Moriwaka <moriwaka(a)valinux.co.jp>