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From: Theodore Tso <tytso@mit.edu>
To: Eric Sandeen <sandeen@redhat.com>
Cc: Kevin Shanahan <kmshanah@ucwb.org.au>,
	Andreas Dilger <adilger@sun.com>, Alex Tomas <bzzz@sun.com>,
	linux-ext4@vger.kernel.org
Subject: Re: More ext4 acl/xattr corruption - 4th occurence now
Date: Fri, 15 May 2009 08:50:35 -0400	[thread overview]
Message-ID: <20090515125035.GC9173@mit.edu> (raw)
In-Reply-To: <4A0CC381.3080804@redhat.com>

On Thu, May 14, 2009 at 08:21:05PM -0500, Eric Sandeen wrote:
> 
> it should lay out a 4g file in random 1m direct IOs to fragment it and
> get a lot of extents, then launch 2 threads, one each doing random reads
> and random writes of that same file.
> 
> I can't make this trip it, though ...

If all of the blocks are in the page cache, you won't end up calling
ext4_get_blocks().  Try adding a shell script which runs in parallel
doing a "while /bin/true ; do sleep 1; echo 3 > /proc/sys/vm/drop_cache; done".

							- Ted

  reply	other threads:[~2009-05-15 12:50 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-05-13  6:26 More ext4 acl/xattr corruption - 4th occurence now Kevin Shanahan
2009-05-13 23:56 ` Kevin Shanahan
2009-05-14  4:40 ` Theodore Tso
2009-05-14 11:07   ` Kevin Shanahan
2009-05-14 11:17     ` Manish Katiyar
2009-05-14 12:30       ` Theodore Tso
2009-05-14 13:25     ` Kevin Shanahan
2009-05-14 14:07       ` Theodore Tso
2009-05-14 14:30         ` Kevin Shanahan
2009-05-14 15:44           ` Eric Sandeen
2009-05-14 21:07             ` Kevin Shanahan
2009-05-14 21:08               ` Eric Sandeen
2009-05-14 16:12           ` Theodore Tso
2009-05-14 21:02             ` Kevin Shanahan
2009-05-14 21:23               ` Theodore Tso
2009-05-14 21:33                 ` Kevin Shanahan
2009-05-15 23:18                   ` Kevin Shanahan
2009-05-15  1:21                 ` Eric Sandeen
2009-05-15 12:50                   ` Theodore Tso [this message]
2009-05-15 12:58                     ` Eric Sandeen
2009-05-15 15:24                       ` Eric Sandeen
2009-05-15 16:27                         ` Eric Sandeen
2009-05-15  4:55                 ` Aneesh Kumar K.V
2009-05-15 10:11                   ` Theodore Tso
2009-05-15 13:07                   ` Theodore Tso
2009-05-19 10:00                 ` Thierry Vignaud
2009-05-19 11:36                   ` Theodore Tso
2009-05-19 12:01                     ` Alex Tomas
2009-05-19 15:04                       ` Theodore Tso
2009-05-19 15:16                         ` Alex Tomas
2009-05-19 15:18                         ` Thierry Vignaud
2009-05-15  3:57             ` Alex Tomas
2009-05-15  4:58   ` Aneesh Kumar K.V
2009-05-15 10:27     ` Theodore Tso
2009-05-18  2:14       ` [PATCH] ext4: Add a comprehensive block validity check to ext4_get_blocks() (Was: More ext4 acl/xattr corruption - 4th occurence now) Theodore Tso

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