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Date:      Wed, 30 Jun 1999 15:16:38 -0400 (EDT)
From:      Garrett Wollman <wollman@khavrinen.lcs.mit.edu>
To:        Julian Elischer <julian@whistle.com>
Cc:        "Brian F. Feldman" <green@unixhelp.org>, Garrett Wollman <wollman@khavrinen.lcs.mit.edu>, Peter Wemm <peter@FreeBSD.org>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject:   Re: cvs commit: src/sys/kern init_main.c kern_fork.c kern_linker.c vfs_aio.c src/sys/sys proc.h
Message-ID:  <199906301916.PAA25752@khavrinen.lcs.mit.edu>
In-Reply-To: <Pine.BSF.3.95.990630105951.12786D-100000@current1.whistle.com>
References:  <Pine.BSF.4.10.9906301357250.50480-100000@janus.syracuse.net> <Pine.BSF.3.95.990630105951.12786D-100000@current1.whistle.com>

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<<On Wed, 30 Jun 1999 11:04:42 -0700 (PDT), Julian Elischer <julian@whistle.com> said:

> I understand how "type stable storage" alters the situation, but I worry
> about the following cases.

> 1/ at some point in the future a different allocation scheme is used.

It will still be type-stable, because TSM is an absolute requirement
for speed and important in enabling non-blocking synchronization.

> 2/ at some point in the future teh zone allocator is taught to reclaim
> totally unused pages of zone memory.
> (I've seen such system)

See #1.

> certainly doable.. but semantically different. What do you do in the case
> where it doesn't match?

The same thing you do now when pfind() returns NULL.

-GAWollman

--
Garrett A. Wollman   | O Siem / We are all family / O Siem / We're all the same
wollman@lcs.mit.edu  | O Siem / The fires of freedom 
Opinions not those of| Dance in the burning flame
MIT, LCS, CRS, or NSA|                     - Susan Aglukark and Chad Irschick


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