From: Pavel Machek <pavel@suse.cz>
To: "Albert D. Cahalan" <acahalan@cs.uml.edu>
Cc: Quinn Harris <quinn@nmt.edu>, linux-kernel@vger.kernel.org
Subject: Re: File copy system call proposal
Date: Mon, 10 Dec 2001 13:13:53 +0100 [thread overview]
Message-ID: <20011210131353.C19142@atrey.karlin.mff.cuni.cz> (raw)
In-Reply-To: <20011209153522.A138@toy.ucw.cz> <200112101150.fBABosS271828@saturn.cs.uml.edu>
In-Reply-To: <200112101150.fBABosS271828@saturn.cs.uml.edu>
Hi!
> >> I would like to propose implementing a file copy system call.
> >> I expect the initial reaction to such a proposal would be "feature
> >> bloat" but I believe some substantial benefits can be seen possibly
> >> making it worthwhile, primarily the following:
> >>
> >> Copy on write:
> >
> > You want cowlink() syscall, not copy() syscall. If they are on different
> > partitions, let userspace do the job.
>
> That looks like a knee-jerk reaction to stuff going in the kernel.
> I want maximum survival of non-UNIX metadata and maximum performance
> for this common operation. Let's say you are telecommuting, and...
It would be very ugly if cp -a started behaving differently after you
upgrade it to use copyfile(). Better preserve only metadata you
"know".
Pavel
--
Casualities in World Trade Center: 6453 dead inside the building,
cryptography in U.S.A. and free speech in Czech Republic.
next prev parent reply other threads:[~2001-12-10 12:14 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1007833194.17577.0.camel@buffy>
2001-12-08 3:42 ` Quinn Harris
2001-12-08 4:00 ` H. Peter Anvin
2001-12-08 4:25 ` Christian Lavoie
2001-12-08 6:03 ` Quinn Harris
2001-12-08 13:57 ` Daniel Phillips
2001-12-09 0:19 ` H. Peter Anvin
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 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 [this message]
2001-12-10 15:20 ` vda
2001-12-10 18:44 Petr Vandrovec
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