On Tue, Oct 21, 2008 at 08:02:43PM -0700, Dave Hansen wrote:

Let's say you have a process you want to checkpoint.  If it uses a
completely discrete IPC namespace, you *know* that nothing else depends
on those IPC ids.  We don't even have to worry about who might have been
using them and when.

Also think about pids.  Without containers, how can you guarantee a
restarted process that it can regain the same pid?

OK, that makes sense.  In a lot of simple cases you can get by without
regaining the same pid; there's an implementation of checkpointing in
GDB that works by injecting fork calls into the child, and it is
useful for a reasonable selection of single-threaded programs.

-- 
Daniel Jacobowitz
CodeSourcery
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