From: Xavier Bestel <xavier.bestel@free.fr>
To: ptb@it.uc3m.es
Cc: Anton Altaparmakov <aia21@cantab.net>,
david.lang@digitalinsight.com,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: (fwd) Re: [RFC] mount flag "direct"
Date: 04 Sep 2002 00:52:58 +0200 [thread overview]
Message-ID: <1031093579.1073.6.camel@bip> (raw)
In-Reply-To: <200209032242.g83MglG21464@oboe.it.uc3m.es>
Le mer 04/09/2002 à 00:42, Peter T. Breuer a écrit :
> Let's maintain a single bit in the superblock that says whether any
> directory structure or whatever else we're worried about has been
> altered (ecch, well, it has to be a timestamp, never mind ..). Before
> every read we check this "bit" ondisk. If it's not set, we happily dive
> for our data where we expect to find it. Otherwise we go through the
> rigmarole you describe.
Won't work. You would need an atomic read-and-write operation for that
(read previous timestamp and write a special timestamp meaning
"currently writing this block"), and you don't have that.
Xav
next prev parent reply other threads:[~2002-09-03 22:55 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-03 21:48 (fwd) Re: [RFC] mount flag "direct" Peter T. Breuer
2002-09-03 22:19 ` Anton Altaparmakov
2002-09-03 22:42 ` Peter T. Breuer
2002-09-03 22:52 ` Xavier Bestel [this message]
2002-09-03 23:44 ` Peter T. Breuer
2002-09-04 7:06 ` Alexander Viro
2002-09-04 9:02 ` Peter T. Breuer
2002-09-04 11:05 ` Anton Altaparmakov
2002-09-04 11:39 ` Peter T. Breuer
2002-09-04 14:13 ` Anton Altaparmakov
2002-09-05 22:45 ` Daniel Phillips
2002-09-05 23:06 ` Anton Altaparmakov
2002-09-05 23:17 ` Daniel Phillips
2002-09-05 23:24 ` Anton Altaparmakov
2002-09-06 8:57 ` Peter T. Breuer
2002-09-06 9:08 ` Anton Altaparmakov
2002-09-06 9:17 ` Peter T. Breuer
2002-09-06 9:50 ` Lars Marowsky-Bree
2002-09-06 14:10 ` Peter T. Breuer
2002-09-06 13:20 ` Helge Hafting
2002-09-06 13:22 ` Rik van Riel
2002-09-06 13:53 ` Peter T. Breuer
2002-09-06 15:32 ` Rik van Riel
2002-09-06 14:25 ` Peter T. Breuer
2002-09-06 17:20 ` Anton Altaparmakov
2002-09-06 17:33 ` Daniel Phillips
2002-09-06 19:32 ` Anton Altaparmakov
2002-09-06 18:29 ` Peter T. Breuer
2002-09-06 19:30 ` Anton Altaparmakov
2002-09-09 16:30 ` Peter T. Breuer
2002-09-17 11:21 ` Anton Altaparmakov
2002-09-05 8:30 ` Helge Hafting
2002-09-05 8:43 ` David Lang
2002-09-05 14:24 ` Peter T. Breuer
2002-09-05 16:59 ` David Lang
2002-09-05 23:08 ` Daniel Phillips
2002-09-06 8:14 ` Ingo Oeser
2002-09-06 9:06 ` Helge Hafting
2002-09-04 12:49 ` Ragnar Kjørstad
2002-09-04 12:54 ` Peter T. Breuer
2002-09-04 13:22 ` Ragnar Kjørstad
2002-09-05 3:36 ` Edgar Toernig
2002-09-05 3:58 ` Alexander Viro
2002-09-05 15:59 ` [RFC] intent-based lookup (was: mount flag "direct") Andreas Dilger
2002-09-03 23:24 ` (fwd) Re: [RFC] mount flag "direct" David Lang
2002-09-04 4:27 ` Kevin O'Connor
2002-09-03 23:05 ` David Lang
[not found] <02Sep6.161154edt.62237@gpu.utcc.utoronto.ca>
2002-09-07 13:36 ` Peter T. Breuer
[not found] <20020909181724.GA31153@ravel.coda.cs.cmu.edu>
2002-09-09 18:58 ` Peter T. Breuer
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