---

yaml
---
r: 274363
b: refs/heads/master
c: b00949a
h: refs/heads/master
i:
  274361: 069734f
  274359: fcd09d5
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8927f66c4ede9a18b4b58f7e6f9debca67065f6b
+refs/heads/master: b00949aa2df9970a912bf060bc95e99da356881c

trunk/fs/fs-writeback.c

@@ -658,14 +658,21 @@ long writeback_inodes_wb(struct bdi_writeback *wb, long nr_pages)
 	return nr_pages - work.nr_pages;
 }
 
-static inline bool over_bground_thresh(void)
+static bool over_bground_thresh(struct backing_dev_info *bdi)
 {
 	unsigned long background_thresh, dirty_thresh;
 
 	global_dirty_limits(&background_thresh, &dirty_thresh);
 
-	return (global_page_state(NR_FILE_DIRTY) +
-		global_page_state(NR_UNSTABLE_NFS) > background_thresh);
+	if (global_page_state(NR_FILE_DIRTY) +
+	    global_page_state(NR_UNSTABLE_NFS) > background_thresh)
+		return true;
+
+	if (bdi_stat(bdi, BDI_RECLAIMABLE) >
+				bdi_dirty_limit(bdi, background_thresh))
+		return true;
+
+	return false;
 }
 
 /*
@@ -727,7 +734,7 @@ static long wb_writeback(struct bdi_writeback *wb,
 		 * For background writeout, stop when we are below the
 		 * background dirty threshold
 		 */
-		if (work->for_background && !over_bground_thresh())
+		if (work->for_background && !over_bground_thresh(wb->bdi))
 			break;
 
 		if (work->for_kupdate) {
@@ -811,7 +818,7 @@ static unsigned long get_nr_dirty_pages(void)
 
 static long wb_check_background_flush(struct bdi_writeback *wb)
 {
-	if (over_bground_thresh()) {
+	if (over_bground_thresh(wb->bdi)) {
 
 		struct wb_writeback_work work = {
 			.nr_pages	= LONG_MAX,