From cd16c8f72aaaf2af06969d1441051b90010f7041 Mon Sep 17 00:00:00 2001
From: Hugh Dickins <hugh@veritas.com>
Date: Wed, 6 Dec 2006 20:39:18 -0800
Subject: [PATCH] [PATCH] ext4 balloc: reset windowsz when full

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@us.ibm.com>
Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: <linux-ext4@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 fs/ext4/balloc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 6bd0bd5bbdc8..af3acf3c37b6 100644
--- a/fs/ext4/balloc.c
+++ b/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;
 	}
-- 
2.20.1