Re: [Qemu-devel] [PATCH 0/3] add "core dump"-like capability

[Anthony Liguori]

Paolo Bonzini wrote:
> Unlike for example xen, KVM virtualized guests do not have a method to
> generate something like a core file.  While kdump could help in the
> case of a crash, it does not cater for non-Linux operating systems
> and does not help with dumping the state live, while the machine is
> running.
>   

Actually, you can use gdb to dump a core from a running guest.  Just do:

(gdb) gcore filename


But really, live migration gives you all the state you need.  Why not 
just introduce a third-party program that you could live migrate to via 
exec?

Regards,

Anthony Liguori