[XFS] Account for the page we just wrote when we detect congestion du…

…ring

the clustering of extra pages in a buffered write.

SGI-PV: 949210
SGI-Modid: xfs-linux-melb:xfs-kern:25130a

Signed-off-by: David Chinner <dgc@sgi.com>
Signed-off-by: Nathan Scott <nathans@sgi.com>

fs/xfs/linux-2.6/xfs_aops.c

@@ -747,10 +747,11 @@ xfs_convert_page(
 			struct backing_dev_info *bdi;
 
 			bdi = inode->i_mapping->backing_dev_info;
+			wbc->nr_to_write--;
 			if (bdi_write_congested(bdi)) {
 				wbc->encountered_congestion = 1;
 				done = 1;
-			} else if (--wbc->nr_to_write <= 0) {
+			} else if (wbc->nr_to_write <= 0) {
 				done = 1;
 			}
 		}