From 1f9322c5cdb7878370325ae6acb229d6b6387bc3 Mon Sep 17 00:00:00 2001
From: Jens Axboe <jens.axboe@oracle.com>
Date: Tue, 18 May 2010 14:31:45 +0200
Subject: [PATCH] --- yaml --- r: 196869 b: refs/heads/master c:
 f9eadbbd424c083b8005c7b738f644611b9ef489 h: refs/heads/master i:   196867:
 497632587d3b96cea73d10a0d7c4aa91bc5a03bd v: v3

---
 [refs]                  | 2 +-
 trunk/fs/fs-writeback.c | 9 +++++++--
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/[refs] b/[refs]
index 20a33f695fb5..2bd6dc89cd1d 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 7c8a3554c683f512dbcee26faedb42e4c05f12fa
+refs/heads/master: f9eadbbd424c083b8005c7b738f644611b9ef489
diff --git a/trunk/fs/fs-writeback.c b/trunk/fs/fs-writeback.c
index 76f546d56a64..437a7431b4ea 100644
--- a/trunk/fs/fs-writeback.c
+++ b/trunk/fs/fs-writeback.c
@@ -978,8 +978,13 @@ int bdi_writeback_task(struct bdi_writeback *wb)
 		if (dirty_writeback_interval) {
 			wait_jiffies = msecs_to_jiffies(dirty_writeback_interval * 10);
 			schedule_timeout_interruptible(wait_jiffies);
-		} else
-			schedule();
+		} else {
+			set_current_state(TASK_INTERRUPTIBLE);
+			if (list_empty_careful(&wb->bdi->work_list) &&
+			    !kthread_should_stop())
+				schedule();
+			__set_current_state(TASK_RUNNING);
+		}
 
 		try_to_freeze();
 	}