linux-kernel - Re: [PATCH 00/14] Fix bug about invalid wake up problem

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Message-ID: <20130829141248.GC3985@htj.dyndns.org>
Date:	Thu, 29 Aug 2013 10:12:48 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Libin <huawei.libin@...wei.com>
Cc:	akpm@...ux-foundation.org, viro@...iv.linux.org.uk,
	eparis@...hat.com, tglx@...utronix.de, rusty@...tcorp.com.au,
	ebiederm@...ssion.com, paulmck@...ux.vnet.ibm.com,
	john.stultz@...aro.org, mingo@...hat.com, peterz@...radead.org,
	gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
	lizefan@...wei.com, jovi.zhangwei@...wei.com, guohanjun@...wei.com,
	zhangdianfang@...wei.com, wangyijing@...wei.com
Subject: Re: [PATCH 00/14] Fix bug about invalid wake up problem

Hello, again.

On Thu, Aug 29, 2013 at 10:08:13PM +0800, Libin wrote:
...
> static void simulate_preempted(void)
> {
> 	schedule();
> }

Gees... of course, your test code will stall.  Preemption !=
schedule().  Please take a look at PREEMPT_ACTIVE handling in
__schedule().

Thanks.

-- 
tejun
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