From: Hugh Dickins <hugh@veritas.com>
Date: Thu, 7 Dec 2006 04:39:18 +0000 (-0800)
Subject: [PATCH] ext4 balloc: reset windowsz when full
X-Git-Tag: v2.6.20-rc1~145^2^2~90
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cd16c8f72aaaf2af06969d1441051b90010f7041;p=linux-2.6

[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>
---

diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index 6bd0bd5bbd..af3acf3c37 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;
 	}