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Re: [Bug] XFS: DIO random write + BufferIO read

To: Jeff Moyer <jmoyer@xxxxxxxxxx>
Subject: Re: [Bug] XFS: DIO random write + BufferIO read
From: Zhi Yong Wu <zwu.kernel@xxxxxxxxx>
Date: Tue, 8 Apr 2014 23:51:58 +0800
Cc: xfstests <xfs@xxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, jack@xxxxxxx, "linux-fsdevel@xxxxxxxxxxxxxxx" <linux-fsdevel@xxxxxxxxxxxxxxx>, "Theodore Ts'o" <tytso@xxxxxxx>
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You can try the latest upstream.

On 4/8/14, Jeff Moyer <jmoyer@xxxxxxxxxx> wrote:
> Zhi Yong Wu <zwu.kernel@xxxxxxxxx> writes:
>> HI
>> When i try something on XFS filesytem, i hit one issue as below:
>> One main task create multiple threads at first, Then it will dio
>> random write some files with random offset and length for each thread.
>> When those files get ready, those multiple threads will bufferio read
>> them and check if the data are same as their corresponding buffer. In
>> theory, they should be same, but the actual result isn't what we
>> expect
>> By the way, i did the same try on ext3 filesystem, but didn't get any
>> such issue.
> What kernel version?
> Cheers,
> Jeff


Zhi Yong Wu

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