linux-kernel - Re: [PATCH 0/7] CPU controller

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Date:	Mon, 21 Aug 2006 10:42:40 +0000
From:	Mike Galbraith <efault@....de>
To:	vatsa@...ibm.com
Cc:	Ingo Molnar <mingo@...e.hu>, Nick Piggin <nickpiggin@...oo.com.au>,
	Sam Vilain <sam@...ain.net>, linux-kernel@...r.kernel.org,
	Kirill Korotaev <dev@...nvz.org>,
	Balbir Singh <balbir@...ibm.com>, sekharan@...ibm.com,
	Andrew Morton <akpm@...l.org>, nagar@...son.ibm.com,
	matthltc@...ibm.com, dipankar@...ibm.com
Subject: Re: [PATCH 0/7] CPU controller - V1

On Sun, 2006-08-20 at 23:10 +0530, Srivatsa Vaddagiri wrote:
> Salient design points of this patch:
> 
> 	- Each task-group gets its own runqueue on every cpu.
> 
> 	- In addition, there is an active and expired array of
> 	  task-groups themselves. Task-groups who have expired their
> 	  quota are put into expired array.
> 
> 	- Task-groups have priorities. Priority of a task-group is the
> 	  same as the priority of the highest-priority runnable task it
> 	  has. This I feel will retain interactiveness of the system
> 	  as it is today.

WRT interactivity: Looking at try_to_wake_up(), it appears that wake-up
of a high priority group-a task will not result in preemption of a lower
priority current group-b task.  True?

	-Mike

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