RE: [Xen-devel] capturing windows crash dumps

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Tue, 18 Aug 2009, James Harper wrote:
> > On 18/08/2009 11:42, "James Harper" <james.harper@xxxxxxxxxxxxxxxx>
> wrote:
> > 
> > >> Could it be as simple as write the guest physical address of a
> > > pre-allocated
> > >> buffer into xenstore (from GPLPV drivers)? Then dump that area of
> > > guest
> > >> memory on guest bugcheck, even as a manual operation from dom0?
> > >
> > > The memory in question could be anything from 64kb (minidump) to the
> > > size of DomU memory (full dump) or somewhere inbetween (kernel
> dump).
> > > I'm normally just interested in the kernel dump which is normally a
> much
> > > more respectable size, but still not the size of memory you can
> easily
> > > find when the system has gone belly up.
> > 
> > Hmm, okay. Could you dump it out over the emulated serial line?
> > 
> 
> I was thinking about that. It could work, then I could just do 'xm
> console <domu> >dump' and parse the dump from there or something.
> 

Good idea, also keep in mind that qemu can emulate multiple serials if
needed.
Stubdoms support multiple serials too, so if you make the changes to add
another serial to qemu please test with stubdoms too :)


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