linux-kernel - Re: [Ocfs2-devel] [PATCH 13/17] ocfs2: Update syncing after splicing to match generic version

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Message-ID: <20090821013617.GI10558@mail.oracle.com>
Date:	Thu, 20 Aug 2009 18:36:17 -0700
From:	Joel Becker <Joel.Becker@...cle.com>
To:	Jan Kara <jack@...e.cz>
Cc:	LKML <linux-kernel@...r.kernel.org>, hch@...radead.org,
	ocfs2-devel@....oracle.com, mfasheh@...e.com
Subject: Re: [Ocfs2-devel] [PATCH 13/17] ocfs2: Update syncing after
 splicing to match generic version

On Wed, Aug 19, 2009 at 06:04:40PM +0200, Jan Kara wrote:
> Update ocfs2 specific splicing code to use generic syncing helper.
> 
> CC: Joel Becker <Joel.Becker@...cle.com>
> CC: ocfs2-devel@....oracle.com
> Signed-off-by: Jan Kara <jack@...e.cz>
> ---
>  fs/ocfs2/file.c |   27 ++++++---------------------
>  1 files changed, 6 insertions(+), 21 deletions(-)
> 
> diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
> index 1c71f0a..bd7fdf8 100644
> --- a/fs/ocfs2/file.c
> +++ b/fs/ocfs2/file.c
> @@ -1990,31 +1990,16 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
>  
>  	if (ret > 0) {
>  		unsigned long nr_pages;
> +		int err;
>  
> -		*ppos += ret;
>  		nr_pages = (ret + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
>  
> -		/*
> -		 * If file or inode is SYNC and we actually wrote some data,
> -		 * sync it.
> -		 */
> -		if (unlikely((out->f_flags & O_SYNC) || IS_SYNC(inode))) {
> -			int err;
> -
> -			mutex_lock(&inode->i_mutex);
> -			err = ocfs2_rw_lock(inode, 1);
> -			if (err < 0) {
> -				mlog_errno(err);
> -			} else {
> -				err = generic_osync_inode(inode, mapping,
> -						  OSYNC_METADATA|OSYNC_DATA);
> -				ocfs2_rw_unlock(inode, 1);
> -			}
> -			mutex_unlock(&inode->i_mutex);
> +		err = generic_write_sync(out, *ppos, ret);
> +		if (err)
> +			ret = err;
> +		else
> +			*ppos += ret;

	You've removed the rw_lock around the sync.  Any reason why?

Joel

-- 

"A narcissist is someone better looking than you are."  
         - Gore Vidal

Joel Becker
Principal Software Developer
Oracle
E-mail: joel.becker@...cle.com
Phone: (650) 506-8127
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