[PATCH] ext3_new_inode fixlet

From: Alex Tomas <alex@clusterfs.com>

If the ext3 inode allocator tries to claim an inode and fails because
another CPU got in there first it will then advance onto the next
blockgroup and try again.

Change it to advance onto the next inode within the same blockgroup
instead.

fs/ext3/ialloc.c

@@ -469,8 +469,11 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 		if (!bitmap_bh)
 			goto fail;
 
-		ino = ext3_find_first_zero_bit((unsigned long *)
-				bitmap_bh->b_data, EXT3_INODES_PER_GROUP(sb));
+		ino = 0;
+
+repeat_in_this_group:
+		ino = ext3_find_next_zero_bit((unsigned long *)
+				bitmap_bh->b_data, EXT3_INODES_PER_GROUP(sb), ino);
 		if (ino < EXT3_INODES_PER_GROUP(sb)) {
 			int credits = 0;
 
@@ -493,6 +496,9 @@ struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode)
 			}
 			/* we lost it */
 			journal_release_buffer(handle, bitmap_bh, credits);
+
+			if (++ino < EXT3_INODES_PER_GROUP(sb))
+				goto repeat_in_this_group;
 		}
 
 		/*