linux-kernel - Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP

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Date:	Tue, 6 May 2008 02:38:03 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Parag Warudkar <parag.warudkar@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"akpm@...l.org" <akpm@...l.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Arjan van de Ven <arjan@...radead.org>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Jesse Barnes <jbarnes@...tuousgeek.org>
Subject: Re: [PATCH] default to n for GROUP_SCHED and FAIR_GROUP_SCHED


* Ingo Molnar <mingo@...e.hu> wrote:

> > Hmm - It's the IO_DELAY stuff - I will test more but it looks like 
> > with CONFIG_IO_DELAY_TYPE_NONE -git boots fine on my machine but 
> > with the same option sched-devel does not. Setting 
> > CONFIG_IO_DELAY_TYPE=0 (0x80) makes sched-devel boots again.
> 
> hm, that's really interesting. I've added a patch that makes 
> IO_DELAY_TYPE_NONE depend on CONFIG_BROKEN, because your machine is 
> reasonably new but apparently needs delays during bootup. But why 
> sched-devel triggered this is still weird.

note that i've added this to sched-devel/latest so if you try the latest 
bits you should get this fix automatically.

	Ingo
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