linux-kernel - Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent tg-internal imbalance

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Date:	Thu, 3 Jul 2014 12:29:10 -0400 (EDT)
From:	Nicolas Pitre <nicolas.pitre@...aro.org>
To:	Peter Zijlstra <peterz@...radead.org>
cc:	Michael wang <wangyun@...ux.vnet.ibm.com>,
	Mike Galbraith <umgwanakikbuti@...il.com>,
	Rik van Riel <riel@...hat.com>,
	Ingo Molnar <mingo@...nel.org>, Alex Shi <alex.shi@...aro.org>,
	Paul Turner <pjt@...gle.com>, Mel Gorman <mgorman@...e.de>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] sched: select 'idle' cfs_rq per task-group to prevent
 tg-internal imbalance

On Wed, 2 Jul 2014, Peter Zijlstra wrote:

> On Wed, Jul 02, 2014 at 02:49:18PM +0200, Peter Zijlstra wrote:
> > Clearly I need to go take out all these things because people don't seem
> > to know this and SCHED_DEBUG isn't a big enough hint. Tedious.
> 
> Maybe this would be enough clue?
> 
> diff --git a/include/linux/kernel.h b/include/linux/kernel.h
> index 4c52907a6d8b..e2dd5ca9e6bf 100644
> --- a/include/linux/kernel.h
> +++ b/include/linux/kernel.h
> @@ -470,6 +470,7 @@ extern enum system_states {
>  #define TAINT_FIRMWARE_WORKAROUND	11
>  #define TAINT_OOT_MODULE		12
>  #define TAINT_UNSIGNED_MODULE		13
> +#define TAINT_DEBUG			14

LOL  ;-)


Nicolas
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