linux-ext4 - [patch 273/354] ext4 balloc: reset windowsz when full

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Date:	Wed, 06 Dec 2006 20:39:18 -0800
From:	akpm@...l.org
To:	torvalds@...l.org
Subject: [patch 273/354] ext4 balloc: reset windowsz when full

From: Hugh Dickins <hugh@...itas.com>

ext4_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.

Signed-off-by: Mingming Cao <cmm@...ibm.com>
Signed-off-by: Hugh Dickins <hugh@...itas.com>
Cc: <linux-ext4@...r.kernel.org>
Signed-off-by: Andrew Morton <akpm@...l.org>
---

 fs/ext4/balloc.c |    1 +
 1 file changed, 1 insertion(+)

diff -puN fs/ext4/balloc.c~ext4-balloc-reset-windowsz-when-full fs/ext4/balloc.c
--- a/fs/ext4/balloc.c~ext4-balloc-reset-windowsz-when-full
+++ a/fs/ext4/balloc.c
@@ -1566,6 +1566,7 @@ retry_alloc:
 	 */
 	if (my_rsv) {
 		my_rsv = NULL;
+		windowsz = 0;
 		group_no = goal_group;
 		goto retry_alloc;
 	}
_
-
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