From: Jamie Lokier <jamie@shareable.org>
To: jim owens <jowens@hp.com>, Chris Mason <chris.mason@oracle.com>,
Theodore Tso <tytso@mit.edu>,
linux-fsdevel@vger.kernel.org, jmorris@namei.org,
ocfs2-devel@oss.oracle.com, viro@zeniv
Subject: [Ocfs2-devel] [PATCH 1/3] fs: Document the reflink(2) system call.
Date: Tue, 5 May 2009 23:11:01 +0100 [thread overview]
Message-ID: <20090505221101.GD7574@shareable.org> (raw)
In-Reply-To: <20090505220459.GN7835@mail.oracle.com>
Joel Becker wrote:
> "Shares the data extents of the source file". I should hope
> that chmod doesn't require copying out all the data.
Oh... I was under the impression that it would, because the
man-page-of-sorts says attributes must be the same and the following
question:
> Jamie Lokier wrote:
> > reflink() sounds useful already, but is there a compelling reason why
> > both files must have the same attributes, and changing attributes will
------------------------
> > break the COW?
--------------
>
> Yeah, because without it you can't use it for snapshotting.
----
If that's not true, then I change my tune substantially and like
reflink() semantics a lot more. :-)
-- Jamie
WARNING: multiple messages have this Message-ID (diff)
From: Jamie Lokier <jamie@shareable.org>
To: jim owens <jowens@hp.com>, Chris Mason <chris.mason@oracle.com>,
Theodore Tso <tytso@mit.edu>,
linux-fsdevel@vger.kernel.org, jmorris@namei.org,
ocfs2-devel@oss.oracle.com, viro@zeniv
Subject: Re: [PATCH 1/3] fs: Document the reflink(2) system call.
Date: Tue, 5 May 2009 23:11:01 +0100 [thread overview]
Message-ID: <20090505221101.GD7574@shareable.org> (raw)
In-Reply-To: <20090505220459.GN7835@mail.oracle.com>
Joel Becker wrote:
> "Shares the data extents of the source file". I should hope
> that chmod doesn't require copying out all the data.
Oh... I was under the impression that it would, because the
man-page-of-sorts says attributes must be the same and the following
question:
> Jamie Lokier wrote:
> > reflink() sounds useful already, but is there a compelling reason why
> > both files must have the same attributes, and changing attributes will
------------------------
> > break the COW?
--------------
>
> Yeah, because without it you can't use it for snapshotting.
----
If that's not true, then I change my tune substantially and like
reflink() semantics a lot more. :-)
-- Jamie
next prev parent reply other threads:[~2009-05-05 22:11 UTC|newest]
Thread overview: 304+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-03 6:15 [Ocfs2-devel] [RFC] The reflink(2) system call Joel Becker
2009-05-03 6:15 ` Joel Becker
2009-05-03 6:15 ` [Ocfs2-devel] [PATCH 1/3] fs: Document the " Joel Becker
2009-05-03 6:15 ` Joel Becker
2009-05-03 8:01 ` [Ocfs2-devel] " Christoph Hellwig
2009-05-03 8:01 ` Christoph Hellwig
2009-05-04 2:46 ` [Ocfs2-devel] " Joel Becker
2009-05-04 2:46 ` Joel Becker
2009-05-04 6:36 ` [Ocfs2-devel] " Michael Kerrisk
2009-05-04 6:36 ` Michael Kerrisk
2009-05-04 7:12 ` [Ocfs2-devel] " Joel Becker
2009-05-04 7:12 ` Joel Becker
2009-05-03 13:08 ` [Ocfs2-devel] " Boaz Harrosh
2009-05-03 13:08 ` Boaz Harrosh
2009-05-03 23:08 ` [Ocfs2-devel] " Al Viro
2009-05-03 23:08 ` Al Viro
2009-05-04 2:49 ` [Ocfs2-devel] " Joel Becker
2009-05-04 2:49 ` Joel Becker
2009-05-03 23:45 ` [Ocfs2-devel] " Theodore Tso
2009-05-03 23:45 ` Theodore Tso
2009-05-04 1:44 ` [Ocfs2-devel] " Tao Ma
2009-05-04 1:44 ` Tao Ma
2009-05-04 18:25 ` [Ocfs2-devel] " Joel Becker
2009-05-04 18:25 ` Joel Becker
2009-05-04 21:18 ` [Ocfs2-devel] " Joel Becker
2009-05-04 21:18 ` Joel Becker
2009-05-04 22:23 ` Theodore Tso
2009-05-04 22:23 ` Theodore Tso
2009-05-05 6:55 ` Joel Becker
2009-05-05 6:55 ` Joel Becker
2009-05-05 1:07 ` Jamie Lokier
2009-05-05 1:07 ` Jamie Lokier
2009-05-05 7:16 ` [Ocfs2-devel] " Joel Becker
2009-05-05 7:16 ` Joel Becker
2009-05-05 8:09 ` [Ocfs2-devel] " Andreas Dilger
2009-05-05 8:09 ` Andreas Dilger
2009-05-05 16:56 ` [Ocfs2-devel] " Joel Becker
2009-05-05 16:56 ` Joel Becker
2009-05-05 21:24 ` [Ocfs2-devel] " Andreas Dilger
2009-05-05 21:24 ` Andreas Dilger
2009-05-05 21:32 ` [Ocfs2-devel] " Joel Becker
2009-05-05 21:32 ` Joel Becker
2009-05-06 7:15 ` [Ocfs2-devel] " Theodore Tso
2009-05-06 7:15 ` Theodore Tso
2009-05-06 14:24 ` jim owens
2009-05-06 14:24 ` jim owens
2009-05-06 14:30 ` jim owens
2009-05-06 14:30 ` jim owens
2009-05-06 17:50 ` jim owens
2009-05-06 17:50 ` jim owens
2009-05-12 19:20 ` Jamie Lokier
2009-05-12 19:20 ` Jamie Lokier
2009-05-12 19:30 ` Jamie Lokier
2009-05-12 19:30 ` Jamie Lokier
2009-05-12 19:11 ` Jamie Lokier
2009-05-12 19:11 ` Jamie Lokier
2009-05-12 19:37 ` jim owens
2009-05-12 19:37 ` jim owens
2009-05-12 20:11 ` Jamie Lokier
2009-05-12 20:11 ` Jamie Lokier
2009-05-05 13:01 ` Theodore Tso
2009-05-05 13:01 ` Theodore Tso
2009-05-05 13:19 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 13:19 ` Jamie Lokier
2009-05-05 13:39 ` [Ocfs2-devel] " Chris Mason
2009-05-05 13:39 ` Chris Mason
2009-05-05 15:36 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 15:36 ` Jamie Lokier
2009-05-05 15:41 ` [Ocfs2-devel] " Chris Mason
2009-05-05 15:41 ` Chris Mason
2009-05-05 16:03 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 16:03 ` Jamie Lokier
2009-05-05 16:18 ` [Ocfs2-devel] " Chris Mason
2009-05-05 16:18 ` Chris Mason
2009-05-05 20:48 ` [Ocfs2-devel] " jim owens
2009-05-05 20:48 ` jim owens
2009-05-05 21:57 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 21:57 ` Jamie Lokier
2009-05-05 22:04 ` [Ocfs2-devel] " Joel Becker
2009-05-05 22:04 ` Joel Becker
2009-05-05 22:11 ` Jamie Lokier [this message]
2009-05-05 22:11 ` Jamie Lokier
2009-05-05 22:24 ` [Ocfs2-devel] " Joel Becker
2009-05-05 22:24 ` Joel Becker
2009-05-05 23:14 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 23:14 ` Jamie Lokier
2009-05-05 22:12 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 22:12 ` Jamie Lokier
2009-05-05 22:21 ` [Ocfs2-devel] " Joel Becker
2009-05-05 22:21 ` Joel Becker
2009-05-05 22:32 ` [Ocfs2-devel] " James Morris
2009-05-05 22:32 ` James Morris
2009-05-05 22:39 ` [Ocfs2-devel] " Joel Becker
2009-05-05 22:39 ` Joel Becker
2009-05-12 19:40 ` [Ocfs2-devel] " Jamie Lokier
2009-05-12 19:40 ` Jamie Lokier
2009-05-05 22:28 ` [Ocfs2-devel] " jim owens
2009-05-05 22:28 ` jim owens
2009-05-05 23:12 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 23:12 ` Jamie Lokier
2009-05-05 16:46 ` [Ocfs2-devel] " Jörn Engel
2009-05-05 16:46 ` Jörn Engel
2009-05-05 16:54 ` [Ocfs2-devel] " Jörn Engel
2009-05-05 16:54 ` Jörn Engel
2009-05-05 22:03 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 22:03 ` Jamie Lokier
2009-05-05 21:44 ` [Ocfs2-devel] copyfile semantics Andreas Dilger
2009-05-05 21:44 ` Andreas Dilger
2009-05-05 21:48 ` [Ocfs2-devel] " Matthew Wilcox
2009-05-05 21:48 ` Matthew Wilcox
2009-05-05 22:25 ` [Ocfs2-devel] " Trond Myklebust
2009-05-05 22:25 ` Trond Myklebust
2009-05-05 22:06 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 22:06 ` Jamie Lokier
2009-05-06 5:57 ` [Ocfs2-devel] " Jörn Engel
2009-05-06 5:57 ` Jörn Engel
2009-05-05 14:21 ` [Ocfs2-devel] [PATCH 1/3] fs: Document the reflink(2) system call Theodore Tso
2009-05-05 14:21 ` Theodore Tso
2009-05-05 15:32 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 15:32 ` Jamie Lokier
2009-05-05 22:49 ` [Ocfs2-devel] " James Morris
2009-05-05 22:49 ` James Morris
2009-05-05 17:05 ` [Ocfs2-devel] " Joel Becker
2009-05-05 17:05 ` Joel Becker
2009-05-05 17:00 ` [Ocfs2-devel] " Joel Becker
2009-05-05 17:00 ` Joel Becker
2009-05-05 17:29 ` [Ocfs2-devel] " Theodore Tso
2009-05-05 17:29 ` Theodore Tso
2009-05-05 22:36 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 22:36 ` Jamie Lokier
2009-05-05 22:30 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 22:30 ` Jamie Lokier
2009-05-05 22:37 ` [Ocfs2-devel] " Joel Becker
2009-05-05 22:37 ` Joel Becker
2009-05-05 23:08 ` [Ocfs2-devel] " jim owens
2009-05-05 23:08 ` jim owens
2009-05-05 13:01 ` [Ocfs2-devel] " Jamie Lokier
2009-05-05 13:01 ` Jamie Lokier
2009-05-05 17:09 ` [Ocfs2-devel] " Joel Becker
2009-05-05 17:09 ` Joel Becker
2009-05-03 6:15 ` [Ocfs2-devel] [PATCH 2/3] fs: Add vfs_reflink() and the ->reflink() inode operation Joel Becker
2009-05-03 6:15 ` Joel Becker
2009-05-03 8:03 ` [Ocfs2-devel] " Christoph Hellwig
2009-05-03 8:03 ` Christoph Hellwig
2009-05-04 2:51 ` [Ocfs2-devel] " Joel Becker
2009-05-04 2:51 ` Joel Becker
2009-05-03 6:15 ` [Ocfs2-devel] [PATCH 3/3] fs: Add the reflink(2) system call Joel Becker
2009-05-03 6:15 ` Joel Becker
2009-05-03 6:27 ` [Ocfs2-devel] " Matthew Wilcox
2009-05-03 6:27 ` Matthew Wilcox
2009-05-03 6:39 ` [Ocfs2-devel] " Al Viro
2009-05-03 6:39 ` Al Viro
2009-05-03 7:48 ` [Ocfs2-devel] " Christoph Hellwig
2009-05-03 7:48 ` Christoph Hellwig
2009-05-03 11:16 ` [Ocfs2-devel] " Al Viro
2009-05-03 11:16 ` Al Viro
2009-05-04 2:53 ` [Ocfs2-devel] " Joel Becker
2009-05-04 2:53 ` Joel Becker
2009-05-04 2:53 ` [Ocfs2-devel] " Joel Becker
2009-05-04 2:53 ` Joel Becker
2009-05-03 8:04 ` [Ocfs2-devel] " Christoph Hellwig
2009-05-03 8:04 ` Christoph Hellwig
2009-05-07 22:15 ` [Ocfs2-devel] [RFC] The reflink(2) system call v2 Joel Becker
2009-05-07 22:15 ` Joel Becker
2009-05-08 1:39 ` [Ocfs2-devel] " James Morris
2009-05-08 1:39 ` James Morris
2009-05-08 1:49 ` [Ocfs2-devel] " Joel Becker
2009-05-08 1:49 ` Joel Becker
2009-05-08 13:01 ` Tetsuo Handa
2009-05-08 2:59 ` [Ocfs2-devel] " jim owens
2009-05-08 2:59 ` jim owens
2009-05-08 3:10 ` [Ocfs2-devel] " Joel Becker
2009-05-08 3:10 ` Joel Becker
2009-05-08 11:53 ` [Ocfs2-devel] " jim owens
2009-05-08 11:53 ` jim owens
2009-05-08 12:16 ` [Ocfs2-devel] " jim owens
2009-05-08 12:16 ` jim owens
2009-05-08 14:11 ` [Ocfs2-devel] " jim owens
2009-05-08 14:11 ` jim owens
2009-05-11 20:40 ` [Ocfs2-devel] [RFC] The reflink(2) system call v4 Joel Becker
2009-05-11 20:40 ` Joel Becker
2009-05-11 22:27 ` [Ocfs2-devel] " James Morris
2009-05-11 22:27 ` James Morris
2009-05-11 22:34 ` [Ocfs2-devel] " Joel Becker
2009-05-11 22:34 ` Joel Becker
2009-05-12 1:12 ` [Ocfs2-devel] " James Morris
2009-05-12 1:12 ` James Morris
2009-05-12 12:18 ` [Ocfs2-devel] " Stephen Smalley
2009-05-12 12:18 ` Stephen Smalley
2009-05-12 17:22 ` [Ocfs2-devel] " Joel Becker
2009-05-12 17:22 ` Joel Becker
2009-05-12 17:32 ` [Ocfs2-devel] " Stephen Smalley
2009-05-12 17:32 ` Stephen Smalley
2009-05-12 18:03 ` [Ocfs2-devel] " Joel Becker
2009-05-12 18:03 ` Joel Becker
2009-05-12 18:04 ` [Ocfs2-devel] " Stephen Smalley
2009-05-12 18:04 ` Stephen Smalley
2009-05-12 18:28 ` [Ocfs2-devel] " Joel Becker
2009-05-12 18:28 ` Joel Becker
2009-05-12 18:37 ` [Ocfs2-devel] " Stephen Smalley
2009-05-12 18:37 ` Stephen Smalley
2009-05-14 18:06 ` [Ocfs2-devel] " Stephen Smalley
2009-05-14 18:06 ` Stephen Smalley
2009-05-14 18:25 ` [Ocfs2-devel] " Stephen Smalley
2009-05-14 18:25 ` Stephen Smalley
2009-05-14 23:25 ` [Ocfs2-devel] " James Morris
2009-05-14 23:25 ` James Morris
2009-05-15 11:54 ` [Ocfs2-devel] " Stephen Smalley
2009-05-15 11:54 ` Stephen Smalley
2009-05-15 13:35 ` [Ocfs2-devel] " James Morris
2009-05-15 13:35 ` James Morris
2009-05-15 15:44 ` [Ocfs2-devel] " Stephen Smalley
2009-05-15 15:44 ` Stephen Smalley
2009-05-13 1:47 ` [Ocfs2-devel] " Casey Schaufler
2009-05-13 1:47 ` Casey Schaufler
2009-05-13 16:43 ` [Ocfs2-devel] " Joel Becker
2009-05-13 16:43 ` Joel Becker
2009-05-13 17:23 ` [Ocfs2-devel] " Stephen Smalley
2009-05-13 17:23 ` Stephen Smalley
2009-05-13 18:27 ` [Ocfs2-devel] " Joel Becker
2009-05-13 18:27 ` Joel Becker
2009-05-12 12:01 ` [Ocfs2-devel] " Stephen Smalley
2009-05-12 12:01 ` Stephen Smalley
2009-05-11 23:11 ` [Ocfs2-devel] " jim owens
2009-05-11 23:11 ` jim owens
2009-05-11 23:42 ` [Ocfs2-devel] " Joel Becker
2009-05-11 23:42 ` Joel Becker
2009-05-12 11:31 ` [Ocfs2-devel] " Jörn Engel
2009-05-12 11:31 ` Jörn Engel
2009-05-12 13:12 ` [Ocfs2-devel] " jim owens
2009-05-12 13:12 ` jim owens
2009-05-12 20:24 ` [Ocfs2-devel] " Jamie Lokier
2009-05-12 20:24 ` Jamie Lokier
2009-05-14 18:43 ` [Ocfs2-devel] " Jörn Engel
2009-05-14 18:43 ` Jörn Engel
2009-05-12 15:04 ` [Ocfs2-devel] " Sage Weil
2009-05-12 15:04 ` Sage Weil
2009-05-12 15:23 ` [Ocfs2-devel] " jim owens
2009-05-12 15:23 ` jim owens
2009-05-12 16:16 ` [Ocfs2-devel] " Sage Weil
2009-05-12 16:16 ` Sage Weil
2009-05-12 17:45 ` [Ocfs2-devel] " jim owens
2009-05-12 17:45 ` jim owens
2009-05-12 20:29 ` [Ocfs2-devel] " Jamie Lokier
2009-05-12 20:29 ` Jamie Lokier
2009-05-12 17:28 ` [Ocfs2-devel] " Joel Becker
2009-05-12 17:28 ` Joel Becker
2009-05-13 4:30 ` [Ocfs2-devel] " Sage Weil
2009-05-13 4:30 ` Sage Weil
2009-05-14 3:57 ` [Ocfs2-devel] " Andy Lutomirski
2009-05-14 3:57 ` Andy Lutomirski
2009-05-14 18:12 ` [Ocfs2-devel] " Stephen Smalley
2009-05-14 18:12 ` Stephen Smalley
2009-05-14 22:00 ` [Ocfs2-devel] " Joel Becker
2009-05-14 22:00 ` Joel Becker
2009-05-15 1:20 ` [Ocfs2-devel] " Jamie Lokier
2009-05-15 1:20 ` Jamie Lokier
2009-05-15 12:01 ` [Ocfs2-devel] " Stephen Smalley
2009-05-15 12:01 ` Stephen Smalley
2009-05-15 15:22 ` [Ocfs2-devel] " Joel Becker
2009-05-15 15:22 ` Joel Becker
2009-05-15 15:55 ` [Ocfs2-devel] " Stephen Smalley
2009-05-15 15:55 ` Stephen Smalley
2009-05-15 16:42 ` [Ocfs2-devel] " Joel Becker
2009-05-15 16:42 ` Joel Becker
2009-05-15 17:01 ` Shaya Potter
2009-05-15 17:01 ` [Ocfs2-devel] " Shaya Potter
2009-05-15 20:53 ` Joel Becker
2009-05-15 20:53 ` Joel Becker
2009-05-18 9:17 ` Jörn Engel
2009-05-18 9:17 ` Jörn Engel
2009-05-18 13:02 ` Stephen Smalley
2009-05-18 13:02 ` Stephen Smalley
2009-05-18 14:33 ` Stephen Smalley
2009-05-18 14:33 ` Stephen Smalley
2009-05-18 17:15 ` Stephen Smalley
2009-05-18 17:15 ` Stephen Smalley
2009-05-18 18:26 ` Joel Becker
2009-05-18 18:26 ` Joel Becker
2009-05-19 16:32 ` [Ocfs2-devel] " Sage Weil
2009-05-19 16:32 ` Sage Weil
2009-05-19 19:20 ` Jonathan Corbet
2009-05-19 19:32 ` Joel Becker
2009-05-19 19:41 ` Jonathan Corbet
2009-05-19 19:41 ` Jonathan Corbet
2009-05-19 19:33 ` Jonathan Corbet
2009-05-19 20:15 ` Jamie Lokier
2009-05-25 7:44 ` [Ocfs2-devel] [RFC] The reflink(2) system call v4. - Question for suitability Mihail Daskalov
2009-05-25 20:42 ` Joel Becker
2009-05-28 0:24 ` [RFC] The reflink(2) system call v5 Joel Becker
2009-05-28 0:24 ` [Ocfs2-devel] " Joel Becker
2009-09-14 22:24 ` Joel Becker
2009-09-14 22:24 ` Joel Becker
2009-09-14 22:24 ` Joel Becker
2009-05-11 20:49 ` [Ocfs2-devel] [RFC] The reflink(2) system call v2 Joel Becker
2009-05-11 20:49 ` Joel Becker
2009-05-11 22:49 ` [Ocfs2-devel] " jim owens
2009-05-11 22:49 ` jim owens
2009-05-11 23:46 ` [Ocfs2-devel] " Joel Becker
2009-05-11 23:46 ` Joel Becker
2009-05-12 0:54 ` [Ocfs2-devel] " Chris Mason
2009-05-12 0:54 ` Chris Mason
2009-05-12 20:36 ` [Ocfs2-devel] " Jamie Lokier
2009-05-12 20:36 ` Jamie Lokier
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