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Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]

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From: David Howells
Subject: Re: [PATCH 02/18] xstat: Add a pair of system calls to make extended file stats available [ver #6]
Date: Saturday, July 31, 2010 - 12:26 pm

utz lehmann <lkml123@s2y4n2c.de> wrote:


Don't do that then.


Yes.


Because using atime is much simpler since the filesystem updates it
automatically.  If you have a separate database then you have redundant
information and you need to maintain metadata integrity which has a cost, both
in terms of disk usage and performance.  I'm working on it, but you don't get
it for free.

David
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Messages in current thread:
[PATCH 00/18] Extended file stat functions [ver #6], David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 01/18] Mark arguments to certain syscalls as being ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 02/18] xstat: Add a pair of system calls to make ex ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 03/18] AFS: Use i_generation not i_version for the ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 04/18] xstat: AFS: Return extended attributes [ver #6], David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 05/18] xstat: eCryptFS: Return extended attributes ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 06/18] xstat: Ext4: Return extended attributes [ver #6], David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 07/18] xstat: NFS: Return extended attributes [ver #6], David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 08/18] xstat: CIFS: Return extended attributes [ver #6], David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 09/18] xstat: Make special system filesystems retur ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 10/18] xstat: Make network filesystems return FS_RE ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 11/18] xstat: Make automounter filesystems return F ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 12/18] xstat: Add a dentry op to handle automountin ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 13/18] xstat: AFS: Use d_automount() rather than ab ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 14/18] xstat: NFS: Use d_automount() rather than ab ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 15/18] xstat: CIFS: Use d_automount() rather than a ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 16/18] xstat: Remove the automount through follow_l ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 17/18] xstat: Add an AT_NO_AUTOMOUNT flag to suppre ..., David Howells, (Wed Jul 14, 7:17 pm)
[PATCH 18/18] xstat: Provide a mechanism to gather extra r ..., David Howells, (Wed Jul 14, 7:17 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Arnd Bergmann, (Thu Jul 15, 1:35 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Thu Jul 15, 2:53 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Mark Harris, (Thu Jul 15, 11:22 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Arnd Bergmann, (Fri Jul 16, 3:46 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Arnd Bergmann, (Fri Jul 16, 4:02 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Fri Jul 16, 5:38 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Arnd Bergmann, (Fri Jul 16, 6:32 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Mark Harris, (Fri Jul 16, 10:51 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Arnd Bergmann, (Sat Jul 17, 2:00 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Christoph Hellwig, (Sun Jul 18, 1:48 am)
Re: [PATCH 12/18] xstat: Add a dentry op to handle automou ..., Christoph Hellwig, (Sun Jul 18, 1:50 am)
Re: [PATCH 18/18] xstat: Provide a mechanism to gather ext ..., Christoph Hellwig, (Sun Jul 18, 1:51 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Mon Jul 19, 7:05 am)
Re: [PATCH 12/18] xstat: Add a dentry op to handle automou ..., David Howells, (Mon Jul 19, 7:10 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Mon Jul 19, 8:17 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Mon Jul 19, 9:15 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Mon Jul 19, 9:51 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Mon Jul 19, 10:26 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Mon Jul 19, 10:46 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Andreas Dilger, (Tue Jul 20, 1:28 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Thu Jul 22, 3:52 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Thu Jul 22, 5:14 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Volker Lendecke, (Thu Jul 22, 5:17 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Thu Jul 22, 5:25 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Thu Jul 22, 6:05 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Thu Jul 22, 8:14 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Volker Lendecke, (Thu Jul 22, 8:36 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Thu Jul 22, 8:46 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Thu Jul 22, 8:47 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Greg Freemyer, (Thu Jul 22, 9:06 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Thu Jul 22, 9:06 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Greg Freemyer, (Thu Jul 22, 9:07 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Jul 22, 9:27 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Thu Jul 22, 9:40 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Thu Jul 22, 10:03 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jim Rees, (Thu Jul 22, 10:12 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Trond Myklebust, (Thu Jul 22, 10:16 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Thu Jul 22, 10:24 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Linus Torvalds, (Thu Jul 22, 10:32 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Thu Jul 22, 10:36 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Jul 22, 11:02 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Jul 22, 11:07 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Jul 22, 11:07 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Jul 22, 11:15 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Benny Halevy, (Thu Jul 22, 11:21 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Greg Freemyer, (Thu Jul 22, 11:41 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Greg Freemyer, (Thu Jul 22, 11:45 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Trond Myklebust, (Thu Jul 22, 11:59 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., John Stoffel, (Thu Jul 22, 12:18 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Benny Halevy, (Thu Jul 22, 12:53 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., tridge, (Thu Jul 22, 6:03 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Ted Ts'o, (Thu Jul 22, 6:21 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., tridge, (Thu Jul 22, 7:12 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Björn Jacke, (Fri Jul 23, 2:14 am)
Re: [PATCH 09/18] xstat: Make special system filesystems r ..., David Howells, (Tue Jul 27, 6:41 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Tue Jul 27, 6:15 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Wed Jul 28, 10:28 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Wed Jul 28, 4:04 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Thu Jul 29, 9:15 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Trond Myklebust, (Fri Jul 30, 11:11 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Phil Pishioneri, (Fri Jul 30, 11:19 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., J. Bruce Fields, (Fri Jul 30, 11:38 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., utz lehmann, (Fri Jul 30, 2:22 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Sat Jul 31, 1:08 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., utz lehmann, (Sat Jul 31, 7:43 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Sat Jul 31, 9:53 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., utz lehmann, (Sat Jul 31, 11:05 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Andreas Dilger, (Sat Jul 31, 11:41 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Sat Jul 31, 11:48 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Trond Myklebust, (Sat Jul 31, 12:03 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., David Howells, (Sat Jul 31, 12:26 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Sat Jul 31, 2:20 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeff Layton, (Sun Aug 1, 6:25 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeff Layton, (Sun Aug 1, 6:40 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Mon Aug 2, 6:13 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Thu Aug 5, 4:52 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Thu Aug 5, 8:38 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Steve French, (Thu Aug 5, 8:55 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeff Layton, (Fri Aug 6, 4:18 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Fri Aug 6, 4:30 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Steve French, (Fri Aug 6, 4:58 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Fri Aug 6, 5:29 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Steve French, (Fri Aug 6, 7:42 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Steve French, (Fri Aug 6, 7:54 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Fri Aug 6, 8:32 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeff Layton, (Sat Aug 7, 3:34 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Sat Aug 7, 4:04 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Sun Aug 8, 5:12 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeff Layton, (Sun Aug 8, 5:53 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Sun Aug 8, 6:05 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Neil Brown, (Sun Aug 8, 4:07 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., J. Bruce Fields, (Fri Aug 13, 5:54 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Fri Aug 13, 10:54 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Steve French, (Fri Aug 13, 11:09 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jan Engelhardt, (Fri Aug 13, 12:06 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Fri Aug 13, 12:19 pm)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., J. Bruce Fields, (Mon Aug 16, 11:04 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., J. Bruce Fields, (Mon Aug 16, 11:08 am)
Re: [PATCH 02/18] xstat: Add a pair of system calls to mak ..., Jeremy Allison, (Mon Aug 16, 12:07 pm)