From: Hugh Dickins <hugh@veritas.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.

Signed-off-by: Hugh Dickins <hugh@veritas.com>
Cc: Martin Bligh <mbligh@google.com>
Acked-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
---

 fs/ext2/balloc.c |    1 +
 1 files changed, 1 insertion(+)

diff -puN fs/ext2/balloc.c~ext2-balloc-reset-windowsz-when-full fs/ext2/balloc.c
--- a/fs/ext2/balloc.c~ext2-balloc-reset-windowsz-when-full
+++ a/fs/ext2/balloc.c
@@ -1292,6 +1292,7 @@ retry_alloc:
 	 */
 	if (my_rsv) {
 		my_rsv = NULL;
+		windowsz = 0;
 		group_no = goal_group;
 		goto retry_alloc;
 	}
_