From: Linus Torvalds <torvalds@linux-foundation.org>
To: Jim Rees <rees@umich.edu>
Cc: Jeremy Allison <jra@samba.org>,
Volker.Lendecke@sernet.de, David Howells <dhowells@redhat.com>,
Jan Engelhardt <jengelh@medozas.de>,
linux-cifs@vger.kernel.org, linux-nfs@vger.kernel.org,
samba-technical@lists.samba.org, linux-kernel@vger.kernel.org,
viro@zeniv.linux.org.uk, linux-fsdevel@vger.kernel.org,
linux-ext4@vger.kernel.org
Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]
Date: Thu, 22 Jul 2010 10:32:31 -0700 [thread overview]
Message-ID: <AANLkTinmV7YuRof7dZGDmbXR_7J2hz2Z_DtsDu54dUGo@mail.gmail.com> (raw)
In-Reply-To: <20100722171224.GA8630@merit.edu>
On Thu, Jul 22, 2010 at 10:12 AM, Jim Rees <rees@umich.edu> wrote:
>
> I believe it was done that way so "dump" could backup just the inode and not
> the data if only the inode had changed. Full history here:
>
> http://blog.plover.com/Unix/ctime.html
Yes, the dump reasoning makes sense, and that history also shows that
originally chmod just changed mtime (since that's the _sane_ thing to
do). So if it wasn't for dump - that nobody uses any more and that was
considered a hack even back when and never supported things like
xattrs etc - unix probably wouldn't have a ctime at all (or would have
implemented a "creation time" because people would have asked for it).
So I'm sure there are reasons for ctime. That just doesn't mean that
it's really "good", the same way there were reasons to name "creat()"
without the "e".
Linus
next prev parent reply other threads:[~2010-07-22 17:33 UTC|newest]
Thread overview: 133+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-15 2:17 [PATCH 00/18] Extended file stat functions [ver #6] David Howells
2010-07-15 2:17 ` [PATCH 01/18] Mark arguments to certain syscalls as being const " David Howells
2010-07-15 2:17 ` [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available " David Howells
2010-07-15 20:35 ` Arnd Bergmann
2010-07-15 21:53 ` David Howells
2010-07-16 6:22 ` Mark Harris
2010-07-16 10:24 ` David Howells
2010-07-16 11:02 ` Arnd Bergmann
2010-07-16 12:38 ` David Howells
2010-07-16 13:32 ` Arnd Bergmann
2010-07-17 5:51 ` Mark Harris
2010-07-17 9:00 ` Arnd Bergmann
[not found] ` <20100717055130.GA2053-EJgEOVOPJGBzbRFIqnYvSA@public.gmane.org>
2010-07-17 9:49 ` David Howells
2010-07-16 10:46 ` Arnd Bergmann
2010-07-16 15:10 ` David Howells
2010-07-18 8:48 ` Christoph Hellwig
2010-07-22 10:52 ` Jan Engelhardt
2010-07-22 12:25 ` David Howells
2010-07-19 14:05 ` David Howells
2010-07-19 15:17 ` Linus Torvalds
2010-07-19 16:15 ` David Howells
2010-07-19 16:51 ` Linus Torvalds
2010-07-19 17:26 ` David Howells
2010-07-19 17:46 ` Linus Torvalds
2010-07-20 8:28 ` Andreas Dilger
2010-07-22 10:35 ` Jan Engelhardt
2010-07-22 12:14 ` David Howells
2010-07-22 12:17 ` Volker Lendecke
2010-07-22 13:05 ` Jan Engelhardt
2010-07-22 15:14 ` Linus Torvalds
2010-07-22 15:36 ` Volker Lendecke
2010-07-22 15:47 ` Linus Torvalds
2010-07-22 16:06 ` Greg Freemyer
2010-07-22 16:07 ` Greg Freemyer
2010-07-22 16:25 ` Jan Engelhardt
2010-07-22 16:27 ` Jeremy Allison
2010-07-22 16:40 ` Linus Torvalds
2010-07-22 16:58 ` Trond Myklebust
2010-07-22 18:02 ` Jeremy Allison
2010-07-22 18:04 ` Volker Lendecke
2010-07-22 18:07 ` Jeremy Allison
2010-07-22 18:59 ` Trond Myklebust
2010-07-30 17:55 ` Phil Pishioneri
2010-07-30 18:11 ` Trond Myklebust
2010-07-30 18:19 ` Phil Pishioneri
2010-07-31 18:41 ` Andreas Dilger
2010-07-31 18:48 ` Jan Engelhardt
2010-07-31 19:03 ` Trond Myklebust
2010-07-31 21:20 ` Jan Engelhardt
2010-08-01 13:17 ` Jeff Layton
2010-07-22 18:05 ` Jan Engelhardt
[not found] ` <alpine.LSU.2.01.1007222004430.4215-SHaQjdQMGhDmsUXKMKRlFA@public.gmane.org>
2010-07-22 18:07 ` Jeremy Allison
2010-07-22 19:18 ` John Stoffel
2010-07-22 17:03 ` Jan Engelhardt
2010-07-22 17:16 ` Trond Myklebust
2010-07-22 17:36 ` Jan Engelhardt
2010-07-22 17:24 ` Linus Torvalds
2010-07-22 18:15 ` Jeremy Allison
2010-07-22 18:21 ` Benny Halevy
2010-07-22 18:45 ` Greg Freemyer
2010-07-22 19:53 ` Benny Halevy
2010-07-22 18:41 ` Greg Freemyer
2010-07-28 1:15 ` Neil Brown
2010-07-28 17:28 ` David Howells
2010-07-28 23:04 ` Neil Brown
2010-07-30 18:38 ` J. Bruce Fields
2010-08-01 13:40 ` Jeff Layton
2010-08-02 14:09 ` Greg Freemyer
2010-08-02 14:42 ` Jeff Layton
2010-07-29 16:15 ` David Howells
2010-08-03 1:13 ` Neil Brown
2010-07-22 17:12 ` Jim Rees
2010-07-22 17:32 ` Linus Torvalds [this message]
2010-07-23 1:03 ` tridge
2010-07-23 1:21 ` Ted Ts'o
2010-07-23 2:12 ` tridge
2010-07-23 9:14 ` Björn Jacke
2010-07-30 21:22 ` utz lehmann
2010-07-31 8:08 ` Jan Engelhardt
2010-07-31 14:43 ` utz lehmann
2010-08-01 13:25 ` Jeff Layton
2010-08-05 23:52 ` Jeremy Allison
2010-08-06 3:38 ` Neil Brown
2010-08-06 3:55 ` Steve French
2010-08-06 11:18 ` Jeff Layton
2010-08-06 23:30 ` Neil Brown
2010-08-06 23:58 ` Steve French
2010-08-07 0:29 ` Neil Brown
2010-08-07 2:42 ` Steve French
2010-08-07 2:54 ` Steve French
2010-08-07 3:32 ` Neil Brown
2010-08-07 10:34 ` Jeff Layton
2010-08-07 11:04 ` Neil Brown
2010-08-08 12:12 ` Jeremy Allison
2010-08-08 12:53 ` Jeff Layton
2010-08-08 13:05 ` Jeremy Allison
2010-08-13 12:54 ` J. Bruce Fields
2010-08-13 17:54 ` Jeremy Allison
2010-08-13 18:09 ` Steve French
2010-08-13 19:06 ` Jan Engelhardt
2010-08-13 19:19 ` Jeremy Allison
2010-08-16 18:04 ` J. Bruce Fields
2010-08-16 18:08 ` J. Bruce Fields
2010-08-16 19:07 ` Jeremy Allison
2010-08-08 23:07 ` Neil Brown
[not found] ` <AANLkTimwIq0pBhCeOjOVjB0y <1280603032.3125.24.camel@heimdal.trondhjem.org>
[not found] ` <1280603032.3125.24.camel-rJ7iovZKK19ZJLDQqaL3InhyD016LWXt@public.gmane.org>
2010-08-01 16:18 ` utz lehmann
2010-07-22 15:46 ` Jan Engelhardt
2010-07-22 16:06 ` David Howells
[not found] ` <AANLkTikBCXK6uEw <AANLkTimdFCGSKLn7aGMpBMIauHTsHY7hpAAmpo6uTcnD@mail.gmail.com>
2010-07-31 16:53 ` David Howells
2010-07-31 18:05 ` utz lehmann
2010-07-31 19:26 ` David Howells
2010-07-15 2:17 ` [PATCH 03/18] AFS: Use i_generation not i_version for the vnode uniquifier " David Howells
2010-07-15 2:17 ` [PATCH 04/18] xstat: AFS: Return extended attributes " David Howells
2010-07-15 2:17 ` [PATCH 05/18] xstat: eCryptFS: " David Howells
2010-07-15 2:17 ` [PATCH 06/18] xstat: Ext4: " David Howells
2010-07-15 2:17 ` [PATCH 07/18] xstat: NFS: " David Howells
2010-07-15 2:17 ` [PATCH 08/18] xstat: CIFS: " David Howells
2010-07-15 2:17 ` [PATCH 09/18] xstat: Make special system filesystems return FS_SPECIAL_FL " David Howells
2010-07-18 8:49 ` Christoph Hellwig
2010-07-19 14:09 ` David Howells
2010-07-27 13:41 ` David Howells
2010-07-15 2:17 ` [PATCH 10/18] xstat: Make network filesystems return FS_REMOTE_FL " David Howells
2010-07-15 2:17 ` [PATCH 11/18] xstat: Make automounter filesystems return FS_AUTOMOUNT_FL " David Howells
2010-07-15 2:17 ` [PATCH 12/18] xstat: Add a dentry op to handle automounting rather than abusing follow_link() " David Howells
2010-07-18 8:50 ` Christoph Hellwig
2010-07-19 14:10 ` David Howells
2010-07-15 2:17 ` [PATCH 13/18] xstat: AFS: Use d_automount() " David Howells
2010-07-15 2:17 ` [PATCH 14/18] xstat: NFS: " David Howells
2010-07-15 2:17 ` [PATCH 15/18] xstat: CIFS: " David Howells
2010-07-15 2:17 ` [PATCH 16/18] xstat: Remove the automount through follow_link() kludge code from pathwalk " David Howells
2010-07-15 2:17 ` [PATCH 17/18] xstat: Add an AT_NO_AUTOMOUNT flag to suppress terminal automount " David Howells
[not found] ` <20100715021709.5544.64506.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2010-07-15 2:17 ` [PATCH 18/18] xstat: Provide a mechanism to gather extra results for [f]xstat() " David Howells
[not found] ` <20100715021730.5544.68442.stgit-S6HVgzuS8uM4Awkfq6JHfwNdhmdF6hFW@public.gmane.org>
2010-07-18 8:51 ` Christoph Hellwig
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