From: Ulrich Drepper <drepper@redhat.com>
To: Rob Ross <rross@mcs.anl.gov>
Cc: Christoph Hellwig <hch@infradead.org>,
Trond Myklebust <trond.myklebust@fys.uio.no>,
Sage Weil <sage@newdream.net>, Brad Boyer <flar@allandria.com>,
Anton Altaparmakov <aia21@cam.ac.uk>,
Gary Grider <ggrider@lanl.gov>,
linux-fsdevel@vger.kernel.org
Subject: Re: NFSv4/pNFS possible POSIX I/O API standards
Date: Wed, 06 Dec 2006 09:42:55 -0800 [thread overview]
Message-ID: <4577011F.6040107@redhat.com> (raw)
In-Reply-To: <4576FD78.4040603@mcs.anl.gov>
Rob Ross wrote:
> File size is definitely one of the more difficult of the parameters,
> either because (a) it isn't stored in one place but is instead derived,
> or (b) because a lock has to be obtained to guarantee consistency of the
> returned value.
OK, and looking at the man page again, it is already on the list in the
old proposal and hence optional. I've no problem with that.
> I can't speak for everyone, but "ls" is the #1 consumer as far as I am
> concerned.
So a syscall for ls alone?
I think this is more a user problem. For normal plain old 'ls' you get
by with readdir. For 'ls -F' and 'ls --color' you mostly get by with
readdir+d_type. If you cannot provide d_type info the readdirplus
extension does you no good. For the cases when an additional stat is
needed (for symlinks, for instance, to test whether they are dangling)
readdirplus won't help.
So, readdirplus is really only useful for 'ls -l'. But then you need
st_size and st_?time. So what is gained with readdirplus?
--
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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next prev parent reply other threads:[~2006-12-06 17:44 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-28 4:34 NFSv4/pNFS possible POSIX I/O API standards Gary Grider
2006-11-28 5:54 ` Christoph Hellwig
2006-11-28 10:54 ` Andreas Dilger
2006-11-28 11:28 ` Anton Altaparmakov
2006-11-28 20:17 ` Russell Cattelan
2006-11-28 23:28 ` Wendy Cheng
2006-11-29 9:12 ` Christoph Hellwig
2006-11-29 9:04 ` Christoph Hellwig
2006-11-29 9:14 ` Christoph Hellwig
2006-11-29 9:48 ` Andreas Dilger
2006-11-29 10:18 ` Anton Altaparmakov
2006-11-29 8:26 ` Brad Boyer
2006-11-30 9:25 ` Christoph Hellwig
2006-11-30 17:49 ` Sage Weil
2006-12-01 5:26 ` Trond Myklebust
2006-12-01 7:08 ` Sage Weil
2006-12-01 14:41 ` Trond Myklebust
2006-12-01 16:47 ` Sage Weil
2006-12-01 18:07 ` Trond Myklebust
2006-12-01 18:42 ` Sage Weil
2006-12-01 19:13 ` Trond Myklebust
2006-12-01 20:32 ` Sage Weil
2006-12-04 18:02 ` Peter Staubach
2006-12-05 23:20 ` readdirplus() as possible POSIX I/O API Sage Weil
2006-12-06 15:48 ` Peter Staubach
2006-12-03 1:57 ` NFSv4/pNFS possible POSIX I/O API standards Andreas Dilger
2006-12-03 7:34 ` Kari Hurtta
2006-12-03 1:52 ` Andreas Dilger
2006-12-03 16:10 ` Sage Weil
2006-12-04 7:32 ` Andreas Dilger
2006-12-04 15:15 ` Trond Myklebust
2006-12-05 0:59 ` Rob Ross
2006-12-05 4:44 ` Gary Grider
2006-12-05 10:05 ` Christoph Hellwig
2006-12-05 5:56 ` Trond Myklebust
2006-12-05 10:07 ` Christoph Hellwig
2006-12-05 14:20 ` Matthew Wilcox
2006-12-06 15:04 ` Rob Ross
2006-12-06 15:44 ` Matthew Wilcox
2006-12-06 16:15 ` Rob Ross
2006-12-05 14:55 ` Trond Myklebust
2006-12-05 22:11 ` Rob Ross
2006-12-05 23:24 ` Trond Myklebust
2006-12-06 16:42 ` Rob Ross
2006-12-06 12:22 ` Ragnar Kjørstad
2006-12-06 15:14 ` Trond Myklebust
2006-12-05 16:55 ` Latchesar Ionkov
2006-12-05 22:12 ` Christoph Hellwig
2006-12-06 23:12 ` Latchesar Ionkov
2006-12-06 23:33 ` Trond Myklebust
2006-12-05 21:50 ` Rob Ross
2006-12-05 22:05 ` Christoph Hellwig
2006-12-05 23:18 ` Sage Weil
2006-12-05 23:55 ` Ulrich Drepper
2006-12-06 10:06 ` Andreas Dilger
2006-12-06 17:19 ` Ulrich Drepper
2006-12-06 17:27 ` Rob Ross
2006-12-06 17:42 ` Ulrich Drepper [this message]
2006-12-06 18:01 ` Ragnar Kjørstad
2006-12-06 18:13 ` Ulrich Drepper
2006-12-17 14:41 ` Ragnar Kjørstad
2006-12-17 19:07 ` Ulrich Drepper
2006-12-17 19:38 ` Matthew Wilcox
2006-12-17 21:51 ` Ulrich Drepper
2006-12-18 2:57 ` Ragnar Kjørstad
2006-12-18 3:54 ` Gary Grider
2006-12-07 5:57 ` Andreas Dilger
2006-12-15 22:37 ` Ulrich Drepper
2006-12-16 18:13 ` Andreas Dilger
2006-12-16 19:08 ` Ulrich Drepper
2006-12-14 23:58 ` statlite() Rob Ross
2006-12-07 23:39 ` NFSv4/pNFS possible POSIX I/O API standards Nikita Danilov
2006-12-05 14:37 ` Peter Staubach
2006-12-05 10:26 ` readdirplus() as possible POSIX I/O API Andreas Dilger
2006-12-05 15:23 ` Trond Myklebust
2006-12-06 10:28 ` Andreas Dilger
2006-12-06 15:10 ` Trond Myklebust
2006-12-05 17:06 ` Latchesar Ionkov
2006-12-05 22:48 ` Rob Ross
2006-11-29 10:25 ` NFSv4/pNFS possible POSIX I/O API standards Steven Whitehouse
2006-11-30 12:29 ` Christoph Hellwig
2006-12-01 15:52 ` Ric Wheeler
2006-11-29 12:23 ` Matthew Wilcox
2006-11-29 12:35 ` Matthew Wilcox
2006-11-29 16:26 ` Gary Grider
2006-11-29 17:18 ` Christoph Hellwig
2006-11-29 12:39 ` Christoph Hellwig
2006-12-01 22:29 ` Rob Ross
2006-12-02 2:35 ` Latchesar Ionkov
2006-12-05 0:37 ` Rob Ross
2006-12-05 10:02 ` Christoph Hellwig
2006-12-05 16:47 ` Latchesar Ionkov
2006-12-05 17:01 ` Matthew Wilcox
[not found] ` <f158dc670612050909m366594c5ubaa87d9a9ecc8c2a@mail.gmail.com>
2006-12-05 17:10 ` Latchesar Ionkov
2006-12-05 17:39 ` Matthew Wilcox
2006-12-05 21:55 ` Rob Ross
2006-12-05 21:50 ` Peter Staubach
2006-12-05 21:44 ` Rob Ross
2006-12-06 11:01 ` openg Christoph Hellwig
2006-12-06 15:41 ` openg Trond Myklebust
2006-12-06 15:42 ` openg Rob Ross
2006-12-06 23:32 ` openg Christoph Hellwig
2006-12-14 23:36 ` openg Rob Ross
2006-12-06 23:25 ` Re: NFSv4/pNFS possible POSIX I/O API standards Latchesar Ionkov
2006-12-06 9:48 ` David Chinner
2006-12-06 15:53 ` openg and path_to_handle Rob Ross
2006-12-06 16:04 ` Matthew Wilcox
2006-12-06 16:20 ` Rob Ross
2006-12-06 20:57 ` David Chinner
2006-12-06 20:40 ` David Chinner
2006-12-06 20:50 ` Matthew Wilcox
2006-12-06 21:09 ` David Chinner
2006-12-06 22:09 ` Andreas Dilger
2006-12-06 22:17 ` Matthew Wilcox
2006-12-06 22:41 ` Andreas Dilger
2006-12-06 23:39 ` Christoph Hellwig
2006-12-14 22:52 ` Rob Ross
2006-12-06 20:50 ` Rob Ross
2006-12-06 21:01 ` David Chinner
2006-12-06 23:19 ` Latchesar Ionkov
2006-12-14 21:00 ` Rob Ross
2006-12-14 21:20 ` Matthew Wilcox
2006-12-14 23:02 ` Rob Ross
2006-11-28 15:08 ` NFSv4/pNFS possible POSIX I/O API standards Matthew Wilcox
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