linux-kernel - RE: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after successful commit

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Date:	Mon, 11 Jan 2016 15:25:11 +0800
From:	Chao Yu <chao2.yu@...sung.com>
To:	'Jaegeuk Kim' <jaegeuk@...nel.org>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Subject: RE: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after successful
	commit

Hi Jaegeuk,

> -----Original Message-----
> From: Jaegeuk Kim [mailto:jaegeuk@...nel.org]
> Sent: Sunday, January 10, 2016 9:10 AM
> To: linux-kernel@...r.kernel.org; linux-fsdevel@...r.kernel.org;
> linux-f2fs-devel@...ts.sourceforge.net
> Cc: Jaegeuk Kim
> Subject: [f2fs-dev] [PATCH] f2fs: should unset atomic flag after successful commit
> 
> If there is an error during commit, we should keep the flag in order to
> abort it.
> 
> Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
> ---
>  fs/f2fs/file.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
> index dfaed51..db0b2cb 100644
> --- a/fs/f2fs/file.c
> +++ b/fs/f2fs/file.c
> @@ -1374,10 +1374,10 @@ static int f2fs_ioc_commit_atomic_write(struct file *filp)
>  		return ret;
> 
>  	if (f2fs_is_atomic_file(inode)) {
> -		clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);

It was added in 6282adbf932c ("f2fs: call set_page_dirty to attach i_wb for
cgroup ") to avoid panic in kernel with writeback supported cgroup. We
should keep it here.

>  		ret = commit_inmem_pages(inode, false);
>  		if (ret)
>  			goto err_out;
> +		clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);

How about setting atomic flag if there occurs an error during committing.

Thanks,

>  	}
> 
>  	ret = f2fs_sync_file(filp, 0, LLONG_MAX, 0);
> --
> 2.6.3
> 
> 
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