linux-kernel - Re: [RFC][PATCH 4/4] sched, numa: Ignore pinned tasks

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Date:	Mon, 18 May 2015 18:40:20 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	mingo@...nel.org, riel@...hat.com, dedekind1@...il.com,
	linux-kernel@...r.kernel.org, mgorman@...e.de, rostedt@...dmis.org,
	juri.lelli@....com
Subject: Re: [RFC][PATCH 4/4] sched, numa: Ignore pinned tasks

>  
>  		/*
>  		 * We classify groups/runqueues into three groups:

Nit: Should we update the above from "three groups" to "four groups"?

> -		 *  - regular: there are !numa tasks
> -		 *  - remote:  there are numa tasks that run on the 'wrong' node
> -		 *  - all:     there is no distinction
> +		 *  - regular: there are (migratable) !numa tasks
> +		 *  - remote:  there are (migratable) numa tasks that
> +		 *             run on the 'wrong' node
> +		 *  - movable: there are (migratable) tasks
> +		 *  - all:     there are tasks
>  		 *
>  		 * In order to avoid migrating ideally placed numa tasks,
>  		 * ignore those when there's better options.

-- 
Thanks and Regards
Srikar Dronamraju

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