Re: [Qemu-devel] [PATCH 3/3] add live dumping capability

[Anthony Liguori]

Paolo Bonzini wrote:
> With the previous cleanups in place, it is easy to trigger
> restart when the state machine goes from the COMPLETING to the
> COMPLETED state.  Besides this, the patch is just simple
> scaffolding for the monitor command and to migrate to a file
> rather than a pipe (which is a bit simpler because we do not
> need non-blocking I/O).
>   

Then this isn't live migration.

This is functionally equivalent to migrate "exec:dd of=filename", no?

I don't think there's value in introduce a new monitor command that just 
does the above.

If you were truly dumping an actual core file and things remained 
"live", that would be compelling, but it would be a lot easier to just 
implement that as an external process.  If you just used a table that 
mapped section names and versions to length, you only really need to 
understand the format of ram and cpu save sections.

Regards,

Anthony Liguori