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ext4/304 is also ext4 defragmentation stress test, which creates several threads to perform defragmentation using 'inplace' mode, but there is a possible race that the donor file has been truncated by thread_A, while thread_B starts to call ioctl(EXT4_IOC_MOVE_EXT), then we may get a EINVAL or ENODATA error. Please see: http://www.spinics.net/lists/linux-ext4/msg46900.html for detailed information. Signed-off-by: Xiaoguang Wang <wangxg.fnst@cn.fujitsu.com> Signed-off-by: Dave Chinner <david@fromorbit.com>