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

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Message-ID: <521F55CD.8090207@huawei.com>
Date:	Thu, 29 Aug 2013 22:08:13 +0800
From:	Libin <huawei.libin@...wei.com>
To:	Libin <huawei.libin@...wei.com>
CC:	<akpm@...ux-foundation.org>, <tj@...nel.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

On 2013/8/29 21:57, Libin wrote:
....
> 2)Test:
> I have written a test module to trigger the problem by adding some
> synchronization condition. I will post it in the form of an attachment soon.
> 
> Test result as follows:
> [103135.332683] wakeup_test: create two kernel threads - producer & consumer
> [103135.332686] wakeup_test: module loaded successfully
> [103135.332692] wakeup_test: kthread producer try to wake up the kthread consumer
> [103165.299865] wakeup_test: kthread consumer have waited for 30s, indicating
> trigger an invalid wakeup problem!
> 
....







View attachment "wakeup_test.c" of type "text/plain" (3041 bytes)