linux-kernel - Re: [PATCH 2/4] f2fs: do not skip writing file meta during fsync

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Message-ID: <CAKYAXd9UQwGoLP9s3n-h2qdtpOFRbzTBVUkWUw2+XPEFo1k-Ew@mail.gmail.com>
Date:	Wed, 27 Mar 2013 09:57:46 +0900
From:	Namjae Jeon <linkinjeon@...il.com>
To:	jaegeuk.kim@...sung.com
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [PATCH 2/4] f2fs: do not skip writing file meta during fsync

2013/3/27, Jaegeuk Kim <jaegeuk.kim@...sung.com>:
> 2013-03-26 (화), 09:48 +0900, Namjae Jeon:
>> 2013/3/25, Jaegeuk Kim <jaegeuk.kim@...sung.com>:
>> > This patch removes data_version check flow during the fsync call.
>> > The original purpose for the use of data_version was to avoid writng
>> > inode
>> > pages redundantly by the fsync calls repeatedly.
>> Hi Jaegeuk.
>> > However, when user can modify file meta and then call fsync, we should
>> > not
>> > skip fsync procedure.
>> I have a question.
>> Which case does user can directly modify meta ? Recovery tool ?
>
> The meta means the inode information like atime, mtime, size, and so on,
> which can be modified by setattr() or something other vfs apis.
> Thanks,
I understood. Thanks for your explanation :)
One more,,
When inode state is  !(inode->i_state & I_DIRTY)), We don't need to skip ?

Thanks.
>
>>
>> Thanks.
>>
>> > So, let's remove this condition check and hope that user triggers in
>> > right
>> > manner.
>> >
>> > Signed-off-by: Jaegeuk Kim <jaegeuk.kim@...sung.com>
>> --
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>
> --
> Jaegeuk Kim
> Samsung
>
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