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Date: Fri, 14 Dec 2007 17:35:13 -0500
From: Chuck Ebbert <cebbert@redhat.com>
Organization: Red Hat
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To: Andi Kleen <andi@firstfloor.org>
CC: Eduard-Gabriel Munteanu <eduard.munteanu@linux360.ro>,
       LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Option to disable AMD C1E (allows dynticks to work)
References: <20071214004442.5f9eba88@linux360.ro> <p737ijigr8c.fsf@bingen.suse.de> <20071214143941.2c7dcfb4@linux360.ro> <20071214101720.GA10981@one.firstfloor.org>
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On 12/14/2007 05:17 AM, Andi Kleen wrote:
>> so do whatever is necessary to enable dynticks. 
> 
> dynticks' main purpose is to save power, but C1e saves more power.
> Disabling C1e for dynticks would be a fairly useless default
> trade off.
> 

What about machines where the BIOS has disabled C1e on CPU 0 but
left it enabled on CPU 1 ??