From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jeff Moyer <jmoyer@redhat.com>
Subject: Re: [Bug] XFS: DIO random write + BufferIO read
Date: Tue, 08 Apr 2014 10:28:10 -0400
Message-ID: <x49bnwbyjyd.fsf@segfault.boston.devel.redhat.com>
References: <CAEH94LiJ6PBRRdFc4aZapLEPT7B7==0dUKQZqzQ6+vQpGpxHLg@mail.gmail.com>
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Cc: "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>,
	jack@suse.cz, Theodore Ts'o <tytso@mit.edu>, xfstests <xfs@oss.sgi.com>
To: Zhi Yong Wu <zwu.kernel@gmail.com>
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In-Reply-To: <CAEH94LiJ6PBRRdFc4aZapLEPT7B7==0dUKQZqzQ6+vQpGpxHLg@mail.gmail.com>
	(Zhi Yong Wu's message of "Fri, 4 Apr 2014 23:09:10 +0800")
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Zhi Yong Wu <zwu.kernel@gmail.com> 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

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