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SubjectRe: [Announce][CFT] loopback mounts and stuff
Hi!

> Nice patches! Ron Minnich <rminnich@lanl.gov> and I built a few similar
> things:
>
> - imount is a system call we added. It implements private namespaces by
> combining a "mount without mountpoint" with a chroot operation. This
> allows a user to sit in an "invisible jail" (perhaps Alcatraz would be a
> good name.).
>
> - memdev is a new block device, simpler, but similar to Sysv memfs. It
> changes a memory region (such as an mmapped file or device) into a block
> device. With PRIVATE mappings of "/" we built a "jail" where some file
> systems became copy on write, backed by swap. Others were mounted as
> InterMezzo and gave a "channel" out.
>
> The purpose of this was to provide a user environment that leaves the
> machine pretty clean: "Take nothing but cycles, leave nothing but swap
> prints" (from the National Park slogan: "Take nothing but pictures, leave
> nothing but footprints").

Hmm, that looks nice. What are you building, sandbox?

Am I right that from now on each process can have completely different
view of filesystem like in plan9?
Pavel
--
I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care."
Panos Katsaloulis describing me w.r.t. patents me at discuss@linmodems.org

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