linux-kernel - Re: [PATCH] cpuset: Allow v2 behavior in v1 cgroup

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Message-ID: <20170816142926.GC4087514@devbig577.frc2.facebook.com>
Date:   Wed, 16 Aug 2017 07:29:27 -0700
From:   Tejun Heo <tj@...nel.org>
To:     Waiman Long <longman@...hat.com>
Cc:     Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>, linux-kernel@...r.kernel.org,
        linux-doc@...r.kernel.org
Subject: Re: [PATCH] cpuset: Allow v2 behavior in v1 cgroup

Hello, Waiman.

On Tue, Aug 15, 2017 at 01:27:20PM -0400, Waiman Long wrote:
> +	cpuset_v2_mode=	[KNL] Enable cpuset v2 behavior in cpuset v1 cgroups.
> +			In v2 mode, the cpus and mems can be restored to
> +			their original values after a removal-addition
> +			event sequence.
> +			0: default value, cpuset v1 keeps legacy behavior.
> +			1: cpuset v1 behaves like cpuset v2.
> +

It feels weird to make this a kernel boot param when all other options
are specified on mount time.  Is there a reason why this can't be a
mount option too?

Thanks.

-- 
tejun