linux-kernel - Re: [PATCH 2/2] cpusets,isolcpus: add file to show isolated cpus in cpuset

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Date:	Wed, 25 Feb 2015 16:21:47 -0500
From:	Rik van Riel <riel@...hat.com>
To:	David Rientjes <rientjes@...gle.com>
CC:	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Clark Williams <williams@...hat.com>,
	Li Zefan <lizefan@...wei.com>, Ingo Molnar <mingo@...hat.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	cgroups@...r.kernel.org
Subject: Re: [PATCH 2/2] cpusets,isolcpus: add file to show isolated cpus
 in cpuset

On 02/25/2015 04:09 PM, David Rientjes wrote:
> On Wed, 25 Feb 2015, riel@...hat.com wrote:
> 
>> diff --git a/kernel/cpuset.c b/kernel/cpuset.c
>> index b544e5229d99..94bf59588e23 100644
>> --- a/kernel/cpuset.c
>> +++ b/kernel/cpuset.c
>> @@ -1563,6 +1563,7 @@ typedef enum {
>>  	FILE_MEMORY_PRESSURE,
>>  	FILE_SPREAD_PAGE,
>>  	FILE_SPREAD_SLAB,
>> +	FILE_ISOLCPUS,
>>  } cpuset_filetype_t;
>>  
>>  static int cpuset_write_u64(struct cgroup_subsys_state *css, struct cftype *cft,
>> @@ -1704,6 +1705,20 @@ static ssize_t cpuset_write_resmask(struct kernfs_open_file *of,
>>  	return retval ?: nbytes;
>>  }
>>  
>> +static void cpuset_seq_print_isolcpus(struct seq_file *sf, struct cpuset *cs)
>> +{
>> +	cpumask_var_t my_isolated_cpus;
>> +
>> +	if (!alloc_cpumask_var(&my_isolated_cpus, GFP_KERNEL))
>> +		return;
>> +
>> +	cpumask_and(my_isolated_cpus, cs->cpus_allowed, cpu_isolated_map);
>> +
>> +	seq_printf(sf, "%*pbl\n", nodemask_pr_args(my_isolated_cpus));
> 
> That unfortunately won't output anything, it needs to be 
> cpumask_pr_args().  After that's fixed, feel free to add my
> 
> 	Acked-by: David Rientjes <rientjes@...gle.com>

Gah. Too many things going on at once.

Let me resend a v3 of just patch 2/2 with your ack.

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