linux-kernel - Re: [RFC PATCH 1/2] cgroup: add per cgroup timer_slack

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Message-ID: <20101202124559.0a7128de@jacob-laptop>
Date:	Thu, 2 Dec 2010 12:45:59 -0800
From:	jacob pan <jacob.jun.pan@...ux.intel.com>
To:	Paul Menage <menage@...gle.com>
Cc:	container cgroup <containers@...ts.linux-foundation.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Li Zefan <lizf@...fujitsu.com>,
	Arjan van de Ven <arjan@...ux.intel.com>
Subject: Re: [RFC PATCH 1/2] cgroup: add per cgroup timer_slack_ns

On Wed, 1 Dec 2010 12:17:20 -0800
Paul Menage <menage@...gle.com> wrote:

> When multiple hierarchies are mounted a task will be in one cgroup on
> each hierarchy - which cgroup's timer_slack_ns value should be used
> for it?
> 
> This doesn't belong in the generic cgroups framework. It sounds like
> it's something that should be its own subsystem, or else part of
> something like the cpu subsystem.
good point. the current behavior is that the timer_slack_ns value will
be assigned by the last hierarchy it attaches to, which might not be
desirable.

I guess timer_slack_ns alone cannot qualify for a new subsystem, I will
try to fit it into cpuset.

Thanks for the review,

Jacob
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