Date: Thu, 19 Apr 2001 10:48:31 +1000 From: "Andrew Reilly" <areilly@bigpond.net.au> To: Julian Elischer <julian@elischer.org> Cc: Robert Watson <rwatson@FreeBSD.ORG>, 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: <20010419104831.A8598@gurney.reilly.home> In-Reply-To: <3ADDCE50.132B9F5D@elischer.org>; from julian@elischer.org on Wed, Apr 18, 2001 at 10:26:40AM -0700 References: <Pine.NEB.3.96L.1010418111539.2462G-100000@fledge.watson.org> <3ADDCE50.132B9F5D@elischer.org>
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On Wed, Apr 18, 2001 at 10:26:40AM -0700, Julian Elischer wrote: > 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. Mmapped data streams: audio IO. There are probably others. -- Andrew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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