From: Christoph Hellwig <hch@ns.caldera.de>
To: Linus Torvalds <torvalds@transmeta.com>
Cc: Christoph Hellwig <hch@ns.caldera.de>,
migo@elte.hu, linux-kernel@vger.kernel.org
Subject: Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1
Date: Tue, 9 Jan 2001 22:12:55 +0100 [thread overview]
Message-ID: <20010109221254.A10085@caldera.de> (raw)
In-Reply-To: <200101092036.VAA06353@ns.caldera.de> <Pine.LNX.4.10.10101091252330.2331-100000@penguin.transmeta.com>
In-Reply-To: <Pine.LNX.4.10.10101091252330.2331-100000@penguin.transmeta.com>; from torvalds@transmeta.com on Tue, Jan 09, 2001 at 12:55:51PM -0800
On Tue, Jan 09, 2001 at 12:55:51PM -0800, Linus Torvalds wrote:
>
>
> On Tue, 9 Jan 2001, Christoph Hellwig wrote:
> >
> > Also the tuple argument you gave earlier isn't right in this specific case:
> >
> > when doing sendfile from pagecache to an fs, you have a bunch of pages,
> > an offset in the first and a length that makes the data end before last
> > page's end.
>
> No.
>
> Look at sendfile(). You do NOT have a "bunch" of pages.
>
> Sendfile() is very much a page-at-a-time thing, and expects the actual IO
> layers to do it's own scatter-gather.
>
> So sendfile() doesn't want any array at all: it only wants a single
> page-offset-length tuple interface.
The current implementations does.
But others are possible. I could post one in a few days to show that it is
possible.
Christoph
--
Whip me. Beat me. Make me maintain AIX.
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next prev parent reply other threads:[~2001-01-09 21:14 UTC|newest]
Thread overview: 119+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-01-08 1:24 [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 David S. Miller
2001-01-08 10:39 ` Christoph Hellwig
2001-01-08 10:34 ` David S. Miller
2001-01-08 18:05 ` Rik van Riel
2001-01-08 21:07 ` David S. Miller
2001-01-09 10:23 ` Ingo Molnar
2001-01-09 10:31 ` Christoph Hellwig
2001-01-09 10:31 ` David S. Miller
2001-01-09 11:28 ` Christoph Hellwig
2001-01-09 11:42 ` David S. Miller
2001-01-09 12:04 ` Ingo Molnar
2001-01-09 14:25 ` Stephen C. Tweedie
2001-01-09 14:33 ` Alan Cox
2001-01-09 15:00 ` Ingo Molnar
2001-01-09 15:27 ` Stephen C. Tweedie
2001-01-09 16:16 ` Ingo Molnar
2001-01-09 16:37 ` Alan Cox
2001-01-09 16:48 ` Ingo Molnar
2001-01-09 17:29 ` Alan Cox
2001-01-09 17:38 ` Jens Axboe
2001-01-09 18:38 ` Ingo Molnar
2001-01-09 19:54 ` Andrea Arcangeli
2001-01-09 20:10 ` Ingo Molnar
2001-01-10 0:00 ` Andrea Arcangeli
2001-01-09 20:12 ` Jens Axboe
2001-01-09 23:20 ` Andrea Arcangeli
2001-01-09 23:34 ` Jens Axboe
2001-01-09 23:52 ` Andrea Arcangeli
2001-01-17 5:16 ` Rik van Riel
2001-01-09 17:56 ` Chris Evans
2001-01-09 18:41 ` Ingo Molnar
2001-01-09 22:58 ` [patch]: ac4 blk (was Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1) Jens Axboe
2001-01-09 19:20 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 J Sloan
2001-01-09 18:10 ` Stephen C. Tweedie
2001-01-09 15:38 ` Benjamin C.R. LaHaise
2001-01-09 16:40 ` Ingo Molnar
2001-01-09 17:30 ` Benjamin C.R. LaHaise
2001-01-09 18:12 ` Stephen C. Tweedie
2001-01-09 18:35 ` Ingo Molnar
2001-01-09 17:53 ` Christoph Hellwig
2001-01-09 21:13 ` David S. Miller
2001-01-09 19:14 ` Linus Torvalds
2001-01-09 20:07 ` Ingo Molnar
2001-01-09 20:15 ` Linus Torvalds
2001-01-09 20:36 ` Christoph Hellwig
2001-01-09 20:55 ` Linus Torvalds
2001-01-09 21:12 ` Christoph Hellwig [this message]
2001-01-09 21:26 ` Linus Torvalds
2001-01-10 7:42 ` Christoph Hellwig
2001-01-10 8:05 ` Linus Torvalds
2001-01-10 8:33 ` Christoph Hellwig
2001-01-10 8:37 ` Andrew Morton
2001-01-10 23:32 ` Linus Torvalds
2001-01-19 15:55 ` Andrew Scott
2001-01-17 14:05 ` Rik van Riel
2001-01-18 0:53 ` Christoph Hellwig
2001-01-18 1:13 ` Linus Torvalds
2001-01-18 17:50 ` Christoph Hellwig
2001-01-18 18:04 ` Linus Torvalds
2001-01-18 21:12 ` Albert D. Cahalan
2001-01-19 1:52 ` 2.4.1-pre8 video/ohci1394 compile problem ebi4
2001-01-19 6:55 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 Linus Torvalds
2001-01-09 23:06 ` Benjamin C.R. LaHaise
2001-01-09 23:54 ` Linus Torvalds
2001-01-10 7:51 ` Gerd Knorr
2001-01-12 1:42 ` Stephen C. Tweedie
2001-01-09 11:05 ` Ingo Molnar
2001-01-09 18:27 ` Christoph Hellwig
2001-01-09 19:19 ` Ingo Molnar
2001-01-09 14:18 ` Stephen C. Tweedie
2001-01-09 14:40 ` Ingo Molnar
2001-01-09 14:51 ` Alan Cox
2001-01-09 15:17 ` Stephen C. Tweedie
2001-01-09 15:37 ` Ingo Molnar
2001-01-09 21:18 ` David S. Miller
2001-01-09 22:25 ` Linus Torvalds
2001-01-10 15:21 ` Stephen C. Tweedie
2001-01-09 15:25 ` Stephen Frost
2001-01-09 15:40 ` Ingo Molnar
2001-01-09 15:48 ` Stephen Frost
2001-01-10 1:14 ` Dave Zarzycki
2001-01-10 1:14 ` David S. Miller
2001-01-10 2:18 ` Dave Zarzycki
2001-01-10 1:19 ` Ingo Molnar
2001-01-10 2:56 ` storage over IP (was Re: [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1) dean gaudet
2001-01-10 2:58 ` David S. Miller
2001-01-10 3:18 ` dean gaudet
2001-01-10 3:09 ` David S. Miller
2001-01-10 3:05 ` storage over IP (was Re: [PLEASE-TESTME] Zerocopy networking patch, Alan Cox
2001-01-08 21:56 ` [PLEASE-TESTME] Zerocopy networking patch, 2.4.0-1 Jes Sorensen
2001-01-08 21:48 ` David S. Miller
2001-01-08 22:32 ` Jes Sorensen
2001-01-08 22:36 ` David S. Miller
2001-01-09 12:12 ` Ingo Molnar
2001-01-08 22:43 ` Stephen Frost
2001-01-08 22:37 ` David S. Miller
2001-01-09 13:52 ` Trond Myklebust
2001-01-09 13:42 ` David S. Miller
2001-01-09 15:27 ` Trond Myklebust
2001-01-09 21:19 ` David S. Miller
2001-01-10 9:21 ` Trond Myklebust
-- strict thread matches above, loose matches on Subject: below --
2001-01-09 13:08 Stephen Landamore
2001-01-09 13:24 ` Ingo Molnar
2001-01-09 13:47 ` Andrew Morton
2001-01-09 19:15 ` Dan Hollis
2001-01-09 19:14 ` Dan Hollis
2001-01-09 22:03 ` David S. Miller
2001-01-09 22:58 ` Dan Hollis
2001-01-09 22:59 ` Ingo Molnar
2001-01-09 23:11 ` Dan Hollis
2001-01-10 3:24 ` Chris Wedgwood
2001-01-09 17:46 Manfred Spraul
2001-01-10 8:41 Manfred Spraul
2001-01-10 8:31 ` David S. Miller
2001-01-10 11:25 ` Ingo Molnar
2001-01-10 12:03 ` Manfred Spraul
2001-01-10 12:07 ` Ingo Molnar
2001-01-10 16:18 ` Jamie Lokier
2001-01-13 15:43 ` yodaiken
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