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Re: [Xen-ia64-devel] Re: [Xen-devel] [PATCH 0/5][IA64][HVM] Windows cras

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-ia64-devel] Re: [Xen-devel] [PATCH 0/5][IA64][HVM] Windows crashdump support
From: John Levon <levon@xxxxxxxxxxxxxxxxx>
Date: Tue, 23 Jan 2007 13:58:36 +0000
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, Jürgen Groß <juergen.gross@xxxxxxxxxxxxxxxxxxx>, Masaki Kanno <kanno.masaki@xxxxxxxxxxxxxx>, xen-ia64-devel@xxxxxxxxxxxxxxxxxxx
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On Tue, Jan 23, 2007 at 08:00:40AM +0000, Keir Fraser wrote:

> >> It just seems a lot of plumbing for something not very useful, at least to
> >> users. You can dump memory via 'xm dump' after all if that's your goal (or
> >> will be able to when Isaku's patches go in). Would anyone else in the ai64
> >> community like to speak up for these patches?
> > 
> > I think there is a big difference between 'xm dump' and a dump done by domU.
> > Detailed error analysis might be possible only with a dump taken via domU as
> > the dump analysis tools will work in most cases on the domU specific dump
> > format only.
> > Outside the Linux world :-) (e.g. in most UNIX flavors) crash dump analysis
> > is very useful!
> > I would strongly support Masaki's patches.
> If that's the aim then perhaps the xm command should be given a better name.
> 'xm os-init' is rather meaningless outside the context of physical INIT
> buttons on ia64 systems -- not a very generic concept to export to a VM
> management tool! Perhaps 'xm os-dump' with a guest-specific backend
> implementation in xend (default to fail with an error message).

I'd like to see a generic command that encompasses both os-init and
sysrq. We support sysrq 'b' but feel a bit silly having that command
name. Ideally we'd hide (but still support) 'xm sysrq' too.


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