---

yaml
---
r: 44916
b: refs/heads/master
c: b2b2cbc
h: refs/heads/master
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: ef129412b4cbd6686d0749612cb9b76e207271f4
+refs/heads/master: b2b2cbc4b2a2f389442549399a993a8306420baf

trunk/kernel/exit.c

@@ -597,14 +597,6 @@ choose_new_parent(struct task_struct *p, struct task_struct *reaper)
 static void
 reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 {
-	/* We don't want people slaying init.  */
-	if (p->exit_signal != -1)
-		p->exit_signal = SIGCHLD;
-
-	if (p->pdeath_signal)
-		/* We already hold the tasklist_lock here.  */
-		group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p);
-
 	/* Move the child from its dying parent to the new one.  */
 	if (unlikely(traced)) {
 		/* Preserve ptrace links if someone else is tracing this child.  */
@@ -620,13 +612,7 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 		p->parent = p->real_parent;
 		add_parent(p);
 
-		/* If we'd notified the old parent about this child's death,
-		 * also notify the new parent.
-		 */
-		if (p->exit_state == EXIT_ZOMBIE && p->exit_signal != -1 &&
-		    thread_group_empty(p))
-			do_notify_parent(p, p->exit_signal);
-		else if (p->state == TASK_TRACED) {
+		if (p->state == TASK_TRACED) {
 			/*
 			 * If it was at a trace stop, turn it into
 			 * a normal stop since it's no longer being
@@ -636,6 +622,27 @@ reparent_thread(struct task_struct *p, struct task_struct *father, int traced)
 		}
 	}
 
+	/* If this is a threaded reparent there is no need to
+	 * notify anyone anything has happened.
+	 */
+	if (p->real_parent->group_leader == father->group_leader)
+		return;
+
+	/* We don't want people slaying init.  */
+	if (p->exit_signal != -1)
+		p->exit_signal = SIGCHLD;
+
+	if (p->pdeath_signal)
+		/* We already hold the tasklist_lock here.  */
+		group_send_sig_info(p->pdeath_signal, SEND_SIG_NOINFO, p);
+
+	/* If we'd notified the old parent about this child's death,
+	 * also notify the new parent.
+	 */
+	if (!traced && p->exit_state == EXIT_ZOMBIE &&
+	    p->exit_signal != -1 && thread_group_empty(p))
+		do_notify_parent(p, p->exit_signal);
+
 	/*
 	 * process group orphan check
 	 * Case ii: Our child is in a different pgrp