Re: [Qemu-devel] [Question] dump memory when host pci device is used by guest

[Avi Kivity]

On 10/24/2011 05:25 PM, Dave Anderson wrote:
>
> ----- Original Message -----
> > On 10/24/2011 04:25 PM, Dave Anderson wrote:
> > > > The question is that: 'virsh dump' can not be used when host pci device
> > > > is used by guest. We are discussing how to fix the problem. We have 
> > > > determined
> > > > that introduce a new monitor command dump. Jan suggested that the core 
> > > > file's
> > > > format is gdb standard core format. Does crash support such format?  If 
> > > > no,
> > > > is it possible to support such format?
> > >
> > > If you are talking about an ELF core dump of the user-space qemu-kvm 
> > > process
> > > running on the host, then it's certainly not supported.
> > 
> > No, an ELF image of the guest's physical memory.
>
> Well then that should be pretty straight forward to support.  Depending upon
> how similar it would be to the "standard" kdump ELF format, the only other
> issue is how to determine the physical base address at which the kernel is
> loaded, in order to be able to translate the mapped kernel-text/static-data
> virtual region of the x86_64 arch (the __START_KERNEL_map region).
>

I guess an elf note would work for that?

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.