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From:   Wu Bo <bo.wu@vivo.com>
Subject: f2fs do DIO write make file corruption
To:     bo.wu@vivo.com, linux-kernel@vger.kernel.org,
        linux-f2fs-devel@lists.sourceforge.net
Message-ID: <5b68208b-fd94-bf4e-fc4b-d79d13abf1c6@vivo.com>
Date:   Wed, 11 Aug 2021 10:48:53 +0800
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I use the following command to create a file, the file may got corruption:
	f2fs_io write 2 0 512 inc_num dio $path

And when I use bio or to set the chunk size to 1 block, the file is 
normal. The commands as following:
	f2fs_io write 2 0 512 inc_num buffered $path
	f2fs_io write 1 0 512 inc_num dio $path

I find this bug on old kernel version 4.14.117, and not find on version 
4.19.152. So this bug is fixed. Can anyone can tell me which patch fixed 
this bug?