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From: "H. Peter Anvin" <hpa@zytor.com>
To: Ulrich Drepper <drepper@gmail.com>
Cc: "Theodore Tso" <tytso@mit.edu>,
	"Trond Myklebust" <trond.myklebust@fys.uio.no>,
	"Jörn Engel" <joern@lazybastard.org>,
	"Christoph Hellwig" <hch@infradead.org>,
	"Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>,
	"Neil Brown" <neilb@suse.de>
Subject: Re: If not readdir() then what?
Date: Tue, 10 Apr 2007 08:48:17 -0700	[thread overview]
Message-ID: <461BB1C1.5050709@zytor.com> (raw)
In-Reply-To: <a36005b50704100710i28d5681fsdab6deb1d5161e28@mail.gmail.com>

Ulrich Drepper wrote:
> On 4/10/07, Theodore Tso <tytso@mit.edu> wrote:
>> That might work.  But if in the long term we want to separate out what
>> we can send back via telldir/seekdir, and some future new Posix
>> interface, [...]
> 
> With all these discussions about fixes for telldir, do we want to
> persue an alternative interface where the user can explicitly specify
> that no telldir/seekdir will ever be used?  From what I know so far it
> would make technical sense since we could speed up/reduce the memory
> footprint of readdir in 99% of most programs.  But is the benefit
> large enough to warrant a second interface?

The real problem sounds like NFS is, in effect, doing telldir/seekdir on 
every directory reference.

It rather makes any user space accesses irrelevant.  The main question 
seems to be if we can realistically increase the cookie size even to 64 
bits.

	-hpa

  reply	other threads:[~2007-04-10 15:50 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-04-07 16:57 If not readdir() then what? Ulrich Drepper
2007-04-07 20:36 ` Theodore Tso
2007-04-07 23:30   ` Christoph Hellwig
2007-04-08 18:11     ` H. Peter Anvin
2007-04-08 18:41       ` Jörn Engel
2007-04-08 19:19         ` Theodore Tso
2007-04-08 19:26           ` Ulrich Drepper
2007-04-08 19:28           ` H. Peter Anvin
2007-04-08 19:40             ` Ulrich Drepper
2007-04-09  1:44             ` Theodore Tso
2007-04-09 11:09               ` Jörn Engel
2007-04-09 12:29                 ` Trond Myklebust
2007-04-09 12:31                 ` Trond Myklebust
2007-04-09 13:19                   ` Theodore Tso
2007-04-09 14:03                     ` Trond Myklebust
2007-04-09 16:34                       ` Jan Engelhardt
2007-04-09 17:00                         ` Trond Myklebust
2007-04-10 13:56                       ` Theodore Tso
2007-04-10 14:10                         ` Ulrich Drepper
2007-04-10 15:48                           ` H. Peter Anvin [this message]
2007-04-10 16:42                             ` Ulrich Drepper
2007-04-10 14:37                         ` Trond Myklebust
2007-04-10 15:54                           ` Jan Engelhardt
2007-04-10 16:18                             ` H. Peter Anvin
2007-04-10 16:25                             ` Valdis.Kletnieks
2007-04-10 21:12                           ` Neil Brown
2007-04-10 21:16                             ` H. Peter Anvin
2007-04-10 21:43                               ` Neil Brown
2007-04-10 21:18                             ` Trond Myklebust
2007-04-10 21:37                               ` Neil Brown
2007-04-10 21:57                                 ` Bob Copeland
2007-04-10 21:59                                 ` Trond Myklebust
2007-04-10 22:33                                   ` Neil Brown
2007-04-11  0:22                                     ` Trond Myklebust
2007-04-11  1:45                                       ` Bernd Eckenfels
2007-04-10 21:46                             ` Alan Cox
2007-04-10 21:26                     ` Neil Brown
2007-04-09 12:46                 ` Andreas Schwab
2007-04-10 21:15         ` Neil Brown
2007-04-11 13:57           ` Jan Engelhardt
2007-04-11 14:42           ` Theodore Tso
2007-04-11 22:32             ` Neil Brown
2007-04-11 22:06               ` David Lang
2007-04-11 23:23                 ` H. Peter Anvin
2007-04-11 23:33                   ` Jörn Engel
2007-04-12  0:00                 ` Neil Brown
2007-04-11 23:22               ` Theodore Tso
2007-04-12  1:46                 ` Neil Brown
2007-04-12  2:37                   ` Jörn Engel
2007-04-12  5:57                     ` Neil Brown
2007-04-12  9:33                       ` Jörn Engel
2007-04-12 12:21                       ` Theodore Tso
2007-04-12 17:18                         ` J. Bruce Fields
2007-04-12 17:35                           ` H. Peter Anvin
2007-04-16  3:05                             ` Theodore Tso
2007-04-16  5:47                               ` Neil Brown
2007-04-16 10:39                                 ` Theodore Tso
2007-04-16  6:18                         ` Neil Brown
2007-04-16 11:07                           ` Theodore Tso
2007-04-16 23:24                             ` Neil Brown
2007-04-08 18:47       ` Theodore Tso
2007-04-08 19:13         ` H. Peter Anvin
2007-04-08 18:50     ` Ulrich Drepper
2007-04-07 23:44   ` Jan Engelhardt
2007-04-08 20:36   ` J. Bruce Fields

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