linux-kernel - Re: [PATCH 10/11] cpuset: allow writing offlined masks to cpuset.cpus/mems

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Message-ID: <20130821141851.GJ19286@mtj.dyndns.org>
Date:	Wed, 21 Aug 2013 10:18:51 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Li Zefan <lizefan@...wei.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Cgroups <cgroups@...r.kernel.org>,
	Containers <containers@...ts.linux-foundation.org>
Subject: Re: [PATCH 10/11] cpuset: allow writing offlined masks to
 cpuset.cpus/mems

Hello,

On Wed, Aug 21, 2013 at 06:01:21PM +0800, Li Zefan wrote:
> -		if (!cpumask_subset(trialcs->cpus_allowed, cpu_active_mask))
> +		if (!cpumask_subset(trialcs->cpus_allowed,
> +				    top_cpuset.cpus_allowed))

Hmmm... top_cpuset.cpus_allowed is filled using cpumask_setall(),
which may include more bits than cpu_possible_mask, which is kinda
weird.  We probably wanna initialize it with cpu_possible_mask and
also maybe using cpu_possible_mask in the above would be clearer?

Also, shouldn't this be dependent upon sane_behavior?

Thanks.

-- 
tejun
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