linux-ext4 - Re: [PATCH 4/4 v2] Fix direct IO return values over fullfilled fallocate space

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Date:	Tue, 3 Nov 2009 21:27:07 -0500
From:	Theodore Tso <tytso@....edu>
To:	Mingming <cmm@...ibm.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>,
	Curt Wohlgemuth <curtw@...gle.com>
Subject: Re: [PATCH 4/4 v2] Fix direct IO return values over fullfilled
	fallocate space

On Thu, Oct 08, 2009 at 06:13:12PM -0700, Mingming wrote:
> @@ -2827,8 +2828,8 @@ static int ext4_split_unwritten_extents(
>   	 * the size of extent to write, there is no need to split
>   	 * uninitialized extent
>   	 */
> - 	if (allocated <= max_blocks)
> -		return ret;
> + 	if (iblock == ee_block && allocated <= max_blocks)
> +		return allocated;

The change to add "iblock == ee_block" isn't explained in the patch
description and it makes the comment above the conditional no longer
accurate.

Can you add an explanation why it's necessary?

Thanks,
					- Ted
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