Re: [PATCH 3/5] v2 seccomp_filters: Enable ftrace-based system call filtering

Ingo Molnar
2011-05-26T18:51:12Z

* Valdis.Kletnieks@vt.edu <Valdis.Kletnieks@vt.edu> wrote:

> On Thu, 26 May 2011 20:36:35 +0200, Ingo Molnar said:
>
> > I suspect we are really offtopic here, but an initial rsync, then
> > stopping the guest, final rsync + restart the guest at the target
> > would work with minimal interruption.
>
> Actually, after you kick off the migrate, you really want to be
> tracking in real time what pages get dirtied while you're doing the
> initial copy, so that the second rsync doesn't have to walk through
> the file finding the differences. But that requires some extra
> instrumentation.

Yeah, and that's how socket based live migration works - it's
completely seemless.

But note that the rsync re-scan should not be an issue: both the
source and the target system will obviously have a *lot* more RAM
than the guest RAM image size.

Thanks,

Ingo