Re: /dev/recycle

[Christoph Rohland <hans-christoph.rohland@sap.com>]

Jamie Lokier <lk@tantalophile.demon.co.uk> writes:

> Christoph Rohland wrote:
> > 1) /dev/{zero,recycle} shared mappings do only work between childs of
> >    the same parent and the parent. Also they do not survive an exec.
> 
> Use file handle passing -- another process can then share the mapping.
> This is what shared anonymous mapping means, and it was added to the
> kernel recently just after posix shm (because posix shm made it easy to
> implement).

That's not how /dev/zero works. Check the implementation. AFAIK it
also does not work this way on other platforms.
 
> > 2) You cannot unmap and remap the same area.
> 
> You can if someone else holds it open.

See above.

Greetings
		Christoph
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