linux-kernel - [patch] BFS 420: get correct runqueue when waking up newly created task

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Message-ID: <CAJd=RBDvKvMykzzZYk7=j=bwX7kC7J3H0vv33_vwbVMw+w4OMw@mail.gmail.com>
Date:	Fri, 25 May 2012 21:41:57 +0800
From:	Hillf Danton <dhillf@...il.com>
To:	LKML <linux-kernel@...r.kernel.org>,
	Hillf Danton <dhillf@...il.com>
Subject: [patch] BFS 420: get correct runqueue when waking up newly created task

When waking up newly created task, runqueue should be determined based on the
parent task for correctly checking if the current task is parent.

--- a/kernel/sched/bfs.c	Mon May 14 20:50:38 2012
+++ b/kernel/sched/bfs.c	Fri May 25 20:07:06 2012
@@ -1771,7 +1771,7 @@ void wake_up_new_task(struct task_struct
 	unsigned long flags;
 	struct rq *rq;

-	rq = task_grq_lock(p, &flags);
+	rq = task_grq_lock(p->parent, &flags);
 	p->state = TASK_RUNNING;
 	parent = p->parent;
 	/* Unnecessary but small chance that the parent changed CPU */
--
--
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