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Re: 64bit GNU Mach

From: Richard Braun
Subject: Re: 64bit GNU Mach
Date: Mon, 2 Apr 2012 14:12:27 +0200
User-agent: Mutt/1.5.20 (2009-06-14)

On Mon, Apr 02, 2012 at 01:57:31PM +0200, Samuel Thibault wrote:
> Richard Braun, le Mon 02 Apr 2012 13:46:08 +0200, a écrit :
> > How do they convert names from/to pointers ? Regular IPC space lookups ?
> Well, yes, just like GNU Mach does, in ipc_kmsg_copyin_header etc.

So we'd loose the optimization, which doesn't seem to be a problem
considering it doesn't concern our main performance issues, and we'd
gain a cleaner interface between ports and names. From what I've seen,
the Hurd doesn't rely on the size of port names either, as it always
uses some lookup mechanism (actually ihash only if I'm right). Now, is
there a point having two types for kernel/user port names, or can't we
just stick to mach_port_t having the right size (the one which matters
for user tasks) ?

Richard Braun

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