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Date:      Thu, 12 Jul 2001 13:04:09 -0700
From:      Kris Kennaway <kris@obsecurity.org>
To:        Mike Karels <karels@bsdi.com>
Cc:        arch@FreeBSD.ORG
Subject:   Re: syscall numbering
Message-ID:  <20010712130408.A6850@xor.obsecurity.org>
In-Reply-To: <200107120234.f6C2YLC14835@redrock.eng.bsdi.com>; from karels@bsdi.com on Wed, Jul 11, 2001 at 09:34:17PM -0500
References:  <200107120234.f6C2YLC14835@redrock.eng.bsdi.com>

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On Wed, Jul 11, 2001 at 09:34:17PM -0500, Mike Karels wrote:

> For now, I'm tempted to reserve 400-449 for BSD/OS customers.  FreeBSD
> seems to be using 300 up, to 374 currently, and BSD/OS calls are all
> below that.  Does this sound plausible?  Does that leave enough for
> FreeBSD expansion?

Hmm, with only 25 unallocated in that window (300-399) it seems like
it may not be enough to account for future kernel interface bloat over
the lifetime of FreeBSD.  e.g. suppose someone implements a new set of
syscalls providing a new class of kernel interface -- something like
AIO in existing FreeBSD which requires a number of syscalls, or the
future kernel threads implementation, or expanded TrustedBSD support -
there's only room in that window for another 2-3 or so sets and we'd
have to expand downwards or something.

Kris

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