From: Ryan Cumming <ryan@completely.kicks-ass.org>
To: "Theodore Ts'o" <tytso@mit.edu>
Cc: Andreas Dilger <adilger@clusterfs.com>,
linux-kernel@vger.kernel.org, ext2-devel@lists.sourceforge.net
Subject: Re: [BK PATCH] Add ext3 indexed directory (htree) support
Date: Sat, 28 Sep 2002 15:30:35 -0700 [thread overview]
Message-ID: <200209281530.40944.ryan@completely.kicks-ass.org> (raw)
In-Reply-To: <20020928141330.GA653@think.thunk.org>
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On September 28, 2002 07:13, Theodore Ts'o wrote:
> I've been able to replicate it now fairly reliably, with the attached
> shell script and 2.4.19 with the 2.4.19-2 dxdir patch.
Yes, that was what I'm using
> It appears to
> be somewhat timing dependent, as where the directory corruption occurs
> is not consistent, but I believe it is in the split code. Since
> e2fsck -fD packs all of the directories completely, it means that any
> attempt to add a file to directory will guarantee at least one split,
> and possibly two levels of tree splits. Since the -D option to e2fsck
> has only been relatively recently been available, I believe this is
> why it hasn't been noticed up until now in the testing; directories
> which are indexed "naturally" as they grow don't appear to trigger the
> problem, or are very, very unlikely to trigger the problem. (One
> potential avenue for exploration is that -D option perfectly sorts all
> of the directory entries in hash order, which doesn't normally occur
> for naturally grown directories, and this may be triggering a
> fencepost error in the split code.)
Yes, running fsck -D seemed to make my loopback filesystem more brittle. I
have triggered corruption without fsck, but it's much more difficult. That
seems to match your description of the problem.
- -Ryan
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next prev parent reply other threads:[~2002-09-28 22:25 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-25 20:03 [BK PATCH] Add ext3 indexed directory (htree) support tytso
2002-09-25 20:34 ` Andreas Dilger
2002-09-25 20:41 ` Dave Jones
2002-09-25 21:08 ` Andreas Dilger
2002-09-25 21:34 ` Theodore Ts'o
2002-09-25 22:54 ` Jeff Garzik
2002-09-25 23:29 ` Theodore Ts'o
2002-09-25 23:45 ` Ryan Cumming
2002-09-26 3:27 ` Theodore Ts'o
2002-09-26 5:23 ` Ryan Cumming
2002-09-26 5:57 ` Theodore Ts'o
2002-09-26 6:22 ` Ryan Cumming
2002-09-26 14:05 ` Theodore Ts'o
2002-09-26 6:25 ` Ryan Cumming
2002-09-26 11:25 ` Daniel Egger
2002-09-26 7:41 ` Ryan Cumming
2002-09-26 13:23 ` Theodore Ts'o
2002-09-26 15:42 ` Theodore Ts'o
2002-09-26 19:08 ` Ryan Cumming
2002-09-26 19:51 ` Horst von Brand
2002-09-26 19:59 ` Ryan Cumming
2002-09-26 22:04 ` Theodore Ts'o
2002-09-26 22:53 ` Ryan Cumming
2002-09-26 23:57 ` Theodore Ts'o
2002-09-27 1:00 ` Ryan Cumming
2002-09-27 3:24 ` Theodore Ts'o
2002-09-27 4:12 ` Andreas Dilger
2002-09-27 7:55 ` Ryan Cumming
2002-09-28 1:20 ` Ryan Cumming
2002-09-28 1:46 ` Ryan Cumming
2002-09-28 14:13 ` Theodore Ts'o
2002-09-28 14:18 ` Theodore Ts'o
2002-09-28 22:35 ` Ryan Cumming
2002-09-28 17:27 ` [Ext2-devel] " Andreas Dilger
2002-09-28 18:43 ` chrisl
2002-09-28 19:45 ` chrisl
2002-09-28 22:30 ` Ryan Cumming [this message]
2002-09-29 7:03 ` [PATCH] fix htree dir corrupt after fsck -fD chrisl
2002-09-29 8:16 ` Ryan Cumming
2002-09-29 8:36 ` Ryan Cumming
2002-09-30 2:46 ` Ryan Cumming
2002-09-29 14:13 ` Theodore Ts'o
2002-09-25 23:31 ` [BK PATCH] Add ext3 indexed directory (htree) support Daniel Egger
2002-09-26 0:32 ` Randy.Dunlap
2002-09-26 0:50 ` Aaron Lehmann
2002-09-26 3:28 ` Theodore Ts'o
2002-10-02 9:11 tytso
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