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
next prev parent 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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