Re: [PATCH 05/10] Core checkpoint/restart support code

["Serge E. Hallyn" <serge@hallyn.com>]

Quoting Nathan Lynch (ntl@pobox.com):
> On Sun, 2011-04-03 at 14:03 -0500, Serge E. Hallyn wrote:
> > Quoting ntl@pobox.com (ntl@pobox.com):
> > > Only a pid namespace init task - the child process produced by a call
> > > to clone(2) with CLONE_NEWPID - is allowed to call these.  The state
> > 
> > So you make this useful for your cases by only using this with
> > application containers - created using lxc-execute, or, more precisely,
> > using lxc-init as the container's init.  So a container running a stock
> > distro can't be checkpointed.
> 
> Correct, a conventional distro init won't work, and application
> containers are my focus for now, at least.
> 
> 
> > Is this just to keep the patch simple for now, or is there some reason
> > to keep this limitation in place?
> 
> I guess you're asking whether non-pid-init processes could be allowed to
> use the syscalls?

No.  I'm asking whether you are intending to later on change the checkpoint
API to allow an external task to checkpoint a pid-init process, rather than
the pid-init process having to initiate it itself.


-serge