linux-kernel - Re: [sched] WARNING: CPU: 0 PID: 3166 at kernel/cpu.c:84 put_online

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Message-ID: <52673735.3020809@linux.vnet.ibm.com>
Date:	Wed, 23 Oct 2013 10:40:53 +0800
From:	Michael wang <wangyun@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Fengguang Wu <fengguang.wu@...el.com>,
	Ingo Molnar <mingo@...nel.org>, linux-kernel@...r.kernel.org
Subject: Re: [sched] WARNING: CPU: 0 PID: 3166 at kernel/cpu.c:84 put_online_cpus()

On 10/23/2013 04:46 AM, Peter Zijlstra wrote:
> On Mon, Oct 21, 2013 at 11:28:30AM +0800, Michael wang wrote:
>> Hi, Fengguang
>>
>> On 10/19/2013 08:51 AM, Fengguang Wu wrote:
>>> Greetings,
>>
>> Will this do any helps?
>>
>> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
>> index c06b8d3..7c61f31 100644
>> --- a/kernel/sched/core.c
>> +++ b/kernel/sched/core.c
>> @@ -3716,7 +3716,6 @@ long sched_setaffinity(pid_t pid, const struct
>> cpumask *in_mask)
>>         p = find_process_by_pid(pid);
>>         if (!p) {
>>                 rcu_read_unlock();
>> -               put_online_cpus();
>>                 return -ESRCH;
>>         }
> 
> Just so..

Yeah... anyway, will send out a formal patch later :)

Regards,
Michael Wang

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