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SubjectRe: [RFC v7][PATCH 2/9] General infrastructure for checkpoint restart
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

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