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Date:   Fri, 14 Aug 2020 09:04:04 +0100
From:   Christoph Hellwig <>
To:     Jiang Ying <>
Subject: Re: [PATCH v4] ext4: fix direct I/O read error

On Wed, Aug 05, 2020 at 03:40:34PM +0800, Jiang Ying wrote:
> This patch is used to fix ext4 direct I/O read error when
> the read size is not aligned with block size.
> Then, I will use a test to explain the error.
> (1) Make a file that is not aligned with block size:
> 	$dd if=/dev/zero of=./test.jar bs=1000 count=3
> (2) I wrote a source file named "direct_io_read_file.c" as following:

Can you please add your reproducer to xfstests?


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