From: "H. Peter Anvin" <hpa@zytor.com>
To: linux-kernel@vger.kernel.org
Subject: Re: File copy system call proposal
Date: 8 Dec 2001 16:19:26 -0800 [thread overview]
Message-ID: <9uuame$ssu$1@cesium.transmeta.com> (raw)
In-Reply-To: <1007782956.355.2.camel@quinn.rcn.nmt.edu> <9us387$poh$1@cesium.transmeta.com> <1007791439.355.7.camel@quinn.rcn.nmt.edu> <E16Chyk-0000zH-00@starship.berlin>
Followup to: <E16Chyk-0000zH-00@starship.berlin>
By author: Daniel Phillips <phillips@bonn-fries.net>
In newsgroup: linux.dev.kernel
>
> There's some merit to this idea. As Peter pointed out, an in-kernel cp isn't
> needed: mmap+write does the job. The question is, how to avoid the
> copy_from_user and double caching of data?
>
One thing that one could do for an in-kernel copy is to extend
sendfile() to support any kind of file descriptor. That'd be a very
clean way to do it.
-hpa
--
<hpa@transmeta.com> at work, <hpa@zytor.com> in private!
"Unix gives you enough rope to shoot yourself in the foot."
http://www.zytor.com/~hpa/puzzle.txt <amsp@zytor.com>
next prev parent reply other threads:[~2001-12-09 0:20 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-12-08 3:42 File copy system call proposal Quinn Harris
2001-12-08 4:00 ` H. Peter Anvin
2001-12-08 6:03 ` Quinn Harris
2001-12-08 13:57 ` Daniel Phillips
2001-12-09 0:19 ` H. Peter Anvin [this message]
2001-12-09 4:56 ` Quinn Harris
2001-12-10 5:44 ` Albert D. Cahalan
2001-12-09 20:25 ` Hans Reiser
2001-12-10 15:19 ` Daniel Phillips
2001-12-13 10:01 ` Andreas Dilger
2001-12-13 21:17 ` Pavel Machek
2001-12-19 20:26 ` Daniel Phillips
2001-12-20 10:09 ` Pavel Machek
2001-12-20 13:38 ` Svein Ove Aas
2001-12-20 13:53 ` Jakob Østergaard
2001-12-20 14:00 ` Jakob Østergaard
2001-12-23 1:19 ` Pavel Machek
2001-12-20 14:31 ` David Woodhouse
2001-12-20 15:06 ` George Greer
2001-12-20 15:07 ` David Woodhouse
2001-12-20 21:32 ` Jamie Lokier
2001-12-08 4:25 ` Christian Lavoie
[not found] ` <1007833194.17577.0.camel@buffy>
2001-12-08 19:23 ` Quinn Harris
2001-12-08 23:11 ` Ton Hospel
2001-12-09 15:35 ` Pavel Machek
2001-12-10 11:50 ` Albert D. Cahalan
2001-12-10 2:49 ` Hans Reiser
2001-12-10 12:13 ` Pavel Machek
2001-12-10 15:20 ` vda
-- strict thread matches above, loose matches on Subject: below --
2001-12-10 18:44 Petr Vandrovec
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