linux-kernel - Re: [PATCH] [RSDL-mm 0/6] RSDL cpu scheduler for -mm

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Date:	Wed, 7 Mar 2007 22:03:33 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Con Kolivas <kernel@...ivas.org>
Cc:	linux-kernel@...r.kernel.org, ck@....kolivas.org
Subject: Re: [PATCH] [RSDL-mm 0/6] RSDL cpu scheduler for -mm

> On Thu, 8 Mar 2007 16:25:05 +1100 Con Kolivas <kernel@...ivas.org> wrote:
> > It also boots OK on a very similar but somewhat older Nocona machine. 
> > Perhaps due to config changes: 
> > http://userweb.kernel.org/~akpm/ck/config-ok.txt
> 
> Ok I just remembered that not only did I expect the cpu task to never be 
> scheduled and it _might_ be scheduled on sched_init, it is actually 
> _consciously_ scheduled on hotplug cpu which I have no way of handling at the 
> moment. On both your configs I noticed you had hotplug cpu enabled, but 
> perhaps it isn't really being used on the more conservative config. So this 
> is something I already know I need to handle. Did your ppc that had 
> the "bitmap error" have hotplug cpu enabled? It might be an unrelated 
> bug^Wphenomenon.

The powerpc config has CONFIG_HOTPLUG_CPU=n
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