linux-ext4 - Re: [PATCH 2/3] 285: Fix file syncing

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Date:	Thu, 30 May 2013 08:47:30 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	Jan Kara <jack@...e.cz>
CC:	xfs@....sgi.com, linux-ext4@...r.kernel.org
Subject: Re: [PATCH 2/3] 285: Fix file syncing

On 5/30/13 7:45 AM, Jan Kara wrote:
> The intention of tests 08 and 09 in test generic/285 is to sync the
> whole file before checking for data and holes. However the helper is
> called with nbytes argument set to 0 which results in not syncing
> anything. Set nbytes properly.

Hm, are you sure? (Is the man page wrong, or is the sync_file_range
implementation wrong?)

DESCRIPTION
       sync_file_range()  permits  fine  control when synchronizing the
       open file referred to by the file descriptor fd with disk.

       offset is the starting byte of the file  range  to  be  synchro-
       nized.   nbytes specifies the length of the range to be synchro-
       nized, in bytes; if nbytes is zero, then all bytes  from  offset
       through to the end of file are synchronized.

-Eric

> Signed-off-by: Jan Kara <jack@...e.cz>
> ---
>  src/seek_sanity_test.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/src/seek_sanity_test.c b/src/seek_sanity_test.c
> index eec6903..7d5868b 100644
> --- a/src/seek_sanity_test.c
> +++ b/src/seek_sanity_test.c
> @@ -229,7 +229,7 @@ static int test09(int fd, int testnum)
>  	 * Sync out dirty pages from bufsz * 100, this will convert
>  	 * the dirty page to writeback.
>  	 */
> -	ret = do_sync_dirty_pages(fd, bufsz * 100, 0);
> +	ret = do_sync_dirty_pages(fd, bufsz * 100, filsz);
>  	if (ret)
>  		goto out;
>  
> @@ -269,7 +269,7 @@ static int test08(int fd, int testnum)
>  		goto out;
>  
>  	/* Sync out all file */
> -	ret = do_sync_dirty_pages(fd, 0, 0);
> +	ret = do_sync_dirty_pages(fd, 0, filsz);
>  	if (ret)
>  		goto out;
>  
> 

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