Date: Wed, 18 Apr 2001 10:26:40 -0700 From: Julian Elischer <julian@elischer.org> To: Robert Watson <rwatson@FreeBSD.ORG> Cc: Poul-Henning Kamp <phk@critter.freebsd.dk>, Kirk McKusick <mckusick@mckusick.com>, Rik van Riel <riel@conectiva.com.br>, freebsd-hackers@FreeBSD.ORG, Matt Dillon <dillon@earth.backplane.com>, David Xu <bsddiy@21cn.com> Subject: Re: vm balance Message-ID: <3ADDCE50.132B9F5D@elischer.org> References: <Pine.NEB.3.96L.1010418111539.2462G-100000@fledge.watson.org>
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Robert Watson wrote:
>
> On Wed, 18 Apr 2001, Poul-Henning Kamp wrote:
> As I indicated in my follow-up mail, the statement about seeking was
> incorrect, that is a property of the open file structure; I believe the
> remainder still holds true. When was the last time you tried mmap'ing or
> seeking on the socket? A socket represents a buffered data stream which
> does not allow arbitrary read/write operations at arbitrary offsets.
Actually there have been times when I did want to mmap a datastream..
I think a datastream mapped into a user buffer-space is one of the
possible 0-copy methods people sometimes mention.
--
__--_|\ Julian Elischer
/ \ julian@elischer.org
( OZ ) World tour 2000-2001
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