From: Linus Torvalds <torvalds@linux-foundation.org>
To: Roland Dreier <rdreier@cisco.com>
Cc: Joel Becker <Joel.Becker@oracle.com>,
Mark Fasheh <mfasheh@suse.com>,
Andrew Morton <akpm@linux-foundation.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
ocfs2-devel@oss.oracle.com
Subject: Re: [GIT PULL] ocfs2 changes for 2.6.32
Date: Thu, 17 Sep 2009 13:17:55 -0700 (PDT) [thread overview]
Message-ID: <alpine.LFD.2.01.0909171316230.4950@localhost.localdomain> (raw)
In-Reply-To: <adabpl9ct3y.fsf@cisco.com>
On Thu, 17 Sep 2009, Roland Dreier wrote:
>
> I guess one bit of semantics to figure out is what happens if copyfile()
> does the async case but then copyfile_ctrl() returns an error halfway
> through... is the state of the dest file just undefined?
I think that's the one that most filesystems would prefer. Maybe the file
is there, it's just that it's only half copied because the filesystem
filled up.
Making filesystems give atomicity guarantees would be hard for the async
case.
Of course, if the filesystem can do the copy entirely atomically (ie by
just incrementing a refcount), then it can give atomicity guarantees, but
then you'd never see the async case either.
Linus
next prev parent reply other threads:[~2009-09-17 20:18 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-11 20:04 Joel Becker
2009-09-14 21:32 ` Linus Torvalds
2009-09-14 22:14 ` Joel Becker
2009-09-14 23:27 ` Linus Torvalds
2009-09-15 0:04 ` Joel Becker
2009-09-15 0:31 ` Linus Torvalds
2009-09-15 0:54 ` Joel Becker
2009-09-15 2:01 ` Linus Torvalds
2009-09-15 4:05 ` Arjan van de Ven
2009-09-15 4:35 ` Joel Becker
2009-09-15 4:06 ` Joel Becker
2009-09-15 16:30 ` Linus Torvalds
2009-09-15 21:45 ` Joel Becker
2009-09-16 4:20 ` Linus Torvalds
2009-09-16 4:40 ` Joel Becker
2009-09-17 16:29 ` Linus Torvalds
2009-09-17 16:38 ` Arjan van de Ven
2009-09-17 20:16 ` Linus Torvalds
2009-09-17 18:40 ` Roland Dreier
2009-09-17 20:17 ` Linus Torvalds [this message]
2009-09-17 20:34 ` Joel Becker
2009-09-18 0:29 ` Linus Torvalds
2009-09-17 20:42 ` Roland Dreier
2009-09-17 20:55 ` Linus Torvalds
2009-09-18 1:43 ` [Ocfs2-devel] " Joel Becker
2009-09-18 13:34 ` Pádraig Brady
2009-09-18 18:37 ` Joel Becker
2009-09-18 17:23 ` Peter W. Morreale
2009-09-18 18:39 ` Joel Becker
2009-09-15 6:44 ` Miklos Szeredi
2009-09-23 11:02 ` [GIT PULL] ocfs2 changes for 2.6.32 (take 2, no syscall) Joel Becker
2009-09-22 0:51 [GIT PULL] ocfs2 changes for 2.6.32 George Spelvin
2009-09-22 3:28 George Spelvin
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