linux-kernel - Re: [PATCH v6] workqueue: Fix edge cases for calc of pool's cpumask

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Date:   Thu, 27 Jul 2017 14:12:52 -0500
From:   Michael Bringmann <mwb@...ux.vnet.ibm.com>
To:     Nathan Fontenot <nfont@...ux.vnet.ibm.com>,
        Tejun Heo <tj@...nel.org>,
        Lai Jiangshan <jiangshanlai@...il.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6] workqueue: Fix edge cases for calc of pool's cpumask


>>
>>  	/* yeap, return possible CPUs in @node that @attrs wants */
>>  	cpumask_and(cpumask, attrs->cpumask, wq_numa_possible_cpumask[node]);
>> +
>> +	if (cpumask_empty(cpumask)) {
>> +		pr_warn_once("WARNING: workqueue cpumask: onl intersect > "
>                                                           ^^^
> This message doesn't seem right, or I am missing something, "onl"?

Shorthand for 'online' in long message.

> 
> -Nathan
> 
>> +				"possible intersect\n");
>> +		return false;
>> +	}
>> +
>>  	return !cpumask_equal(cpumask, attrs->cpumask);
>>
>>  use_dfl:
>>
> 

-- 
Michael W. Bringmann
Linux Technology Center
IBM Corporation
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External: (512) 286-5196
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mwb@...ux.vnet.ibm.com