linux-kernel - Re: [PATCH] [5/6] scheduler: Protect important kernel threads against normalize

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Message-ID: <20071008115142.GE22199@elte.hu>
Date:	Mon, 8 Oct 2007 13:51:42 +0200
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [5/6] scheduler: Protect important kernel threads
	against normalize_rt


* Andi Kleen <ak@...e.de> wrote:

> Not only the migration thread, but also softlockup and stop machine 
> need to be protected against normalize_rt(). Instead of checking for 
> them all I added a new process flag for this.

hm, i dont really like this. The migration thread is an absolute 
exception because it's needed for a correct scheduler. SysRq-N is like 
SysRq-U or SysRq-B - last-minute resort in case something Goes Foul. 
Results are not guaranteed.

	Ingo
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