X-Git-Url: https://git.kernel.dk/?a=blobdiff_plain;f=kernel%2Fhung_task.c;h=d234022805dcb5c5b8b169c92fde5956b5b0ce79;hb=9ad18b75c2f6e4a78ce204e79f37781f8815c0fa;hp=e0f90c2b57aa831ac978f70e5730830f52bcd5c7;hpb=7ce14f6ff26460819345fe8495cf2dd6538b7cdc;p=linux-2.6-block.git

diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index e0f90c2b57aa..d234022805dc 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -185,10 +185,12 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
 	rcu_read_unlock();
 }
 
-static unsigned long timeout_jiffies(unsigned long timeout)
+static long hung_timeout_jiffies(unsigned long last_checked,
+				 unsigned long timeout)
 {
 	/* timeout of 0 will disable the watchdog */
-	return timeout ? timeout * HZ : MAX_SCHEDULE_TIMEOUT;
+	return timeout ? last_checked - jiffies + timeout * HZ :
+		MAX_SCHEDULE_TIMEOUT;
 }
 
 /*
@@ -224,18 +226,21 @@ EXPORT_SYMBOL_GPL(reset_hung_task_detector);
  */
 static int watchdog(void *dummy)
 {
+	unsigned long hung_last_checked = jiffies;
+
 	set_user_nice(current, 0);
 
 	for ( ; ; ) {
 		unsigned long timeout = sysctl_hung_task_timeout_secs;
+		long t = hung_timeout_jiffies(hung_last_checked, timeout);
 
-		while (schedule_timeout_interruptible(timeout_jiffies(timeout)))
-			timeout = sysctl_hung_task_timeout_secs;
-
-		if (atomic_xchg(&reset_hung_task, 0))
+		if (t <= 0) {
+			if (!atomic_xchg(&reset_hung_task, 0))
+				check_hung_uninterruptible_tasks(timeout);
+			hung_last_checked = jiffies;
 			continue;
-
-		check_hung_uninterruptible_tasks(timeout);
+		}
+		schedule_timeout_interruptible(t);
 	}
 
 	return 0;