linux-kernel - Re: [LKP] [sched] BUG: kernel boot hang

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Message-ID: <20150215154620.GC8838@lerouge>
Date:	Sun, 15 Feb 2015 16:46:22 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Huang Ying <ying.huang@...el.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [LKP] [sched] BUG: kernel boot hang

On Sun, Feb 15, 2015 at 03:43:28PM +0800, Huang Ying wrote:
> FYI, we noticed the below changes on
> 
> commit a18b5d01819235629289212ad428a5ee2b40f0d9 ("sched: Fix missing preemption opportunity")

Huang,

Can you please test the following patch and check if it still crashes?

Thanks.


diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index c017a5f..a6d4d6c 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -2879,7 +2879,7 @@ void __sched schedule_preempt_disabled(void)
 	preempt_disable();
 }
 
-static void preempt_schedule_common(void)
+static void __sched notrace preempt_schedule_common(void)
 {
 	do {
 		preempt_count_add(PREEMPT_ACTIVE);

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