Re: proxy memory objects patch

[Marcus Brinkmann]

On Tue, Dec 03, 2002 at 08:29:20PM -0800, Thomas Bushnell, BSG wrote:
> Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de> writes:
> 
> > > Also, it seems worthwhile to make it possible to have a hole.  Maybe you
> > > intended that but didn't say.  e.g. an object[i] that is MACH_PORT_NULL
> > > means a hole at start[i].
> > 
> > Well, I did say it:
> > 
> > "Note that you can specify MACH_PORT_NULL as a memobj if you want a hole."
> 
> That's wrong, however.  MACH_PORT_NULL, as a memory object, does not
> mean "no object", it means "anonymously allocated memory".  You
> shouldn't overload that meaning, even if you can't (or don't want to
> bother) providing the interface that it would mean.

Mmh, I was actually thinking of a hole as being anonymously allocated
memory, ie, zero filled.

Do we really need actual holes, ie, invalid pages?  Can we use
MACH_PORT_DEAD?

Thanks,
Marcus

-- 
`Rhubarb is no Egyptian god.' GNU      http://www.gnu.org    marcus@gnu.org
Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
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