linux-ext4 - [PATCH 1/12] ext3 balloc: reset windowsz when full

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Date:	Tue, 28 Nov 2006 20:13:54 -0800
From:	Mingming Cao <cmm@...ibm.com>
To:	Andrew Morton <akpm@...l.org>, Hugh Dickins <hugh@...itas.com>
Cc:	Mel Gorman <mel@...net.ie>, "Martin J. Bligh" <mbligh@...igh.org>,
	linux-kernel@...r.kernel.org,
	"linux-ext4@...r.kernel.org" <linux-ext4@...r.kernel.org>
Subject: [PATCH 1/12] ext3 balloc: reset windowsz when full

Port a series ext2 balloc patches from Hugh to ext3/4. The first 6
patches are against ext3, and the rest are aginst ext4.


------------------------------------------------------
Subject: ext2 balloc: reset windowsz when full
From: Hugh Dickins <hugh@...itas.com>

ext2_new_blocks should reset the reservation window size to 0 when squeezing
the last blocks out of an almost full filesystem, so the retry doesn't skip
any groups with less than half that free, reporting ENOSPC too soon.

------------------------------------------------------
Sync up reservation fix from ext2

Signed-off-by: Mingming Cao <cmm@...ibm.com>
---


---

 linux-2.6.19-rc5-cmm/fs/ext3/balloc.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN fs/ext3/balloc.c~ext3_reset_windowsz_in_full_fs fs/ext3/balloc.c
--- linux-2.6.19-rc5/fs/ext3/balloc.c~ext3_reset_windowsz_in_full_fs	2006-11-28 19:36:41.000000000 -0800
+++ linux-2.6.19-rc5-cmm/fs/ext3/balloc.c	2006-11-28 19:36:41.000000000 -0800
@@ -1552,6 +1552,7 @@ retry_alloc:
 	 */
 	if (my_rsv) {
 		my_rsv = NULL;
+		windowsz = 0;
 		group_no = goal_group;
 		goto retry_alloc;
 	}

_


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