---

yaml --- r: 142791 b: refs/heads/master c: cf2592f h: refs/heads/master i: 142789: bb05d79 142787: 8b75c3d 142783: b74b921 v: v3
git-mirror · Feb 11, 2009 · a6dc75d · a6dc75d
1 parent 866af4d
commit a6dc75d
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Showing 2 changed files with 8 additions and 2 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 17406b82d621930cca8ccc1272cdac9a7dae8e40
+refs/heads/master: cf2592f59c0e8ed4308adbdb2e0a88655379d579
diff --git a/trunk/kernel/hung_task.c b/trunk/kernel/hung_task.c
@@ -72,7 +72,13 @@ static void check_hung_task(struct task_struct *t, unsigned long timeout)
 {
 	unsigned long switch_count = t->nvcsw + t->nivcsw;
 
-	if (t->flags & PF_FROZEN)
+	/*
+	 * Ensure the task is not frozen.
+	 * Also, when a freshly created task is scheduled once, changes
+	 * its state to TASK_UNINTERRUPTIBLE without having ever been
+	 * switched out once, it musn't be checked.
+	 */
+	if (unlikely(t->flags & PF_FROZEN || !switch_count))
 		return;
 
 	if (switch_count != t->last_switch_count) {