Message-ID: <4370BB85.9060303@zytor.com>
Date: Tue, 08 Nov 2005 06:51:50 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Ingo Molnar <mingo@elte.hu>
CC: Zachary Amsden <zach@vmware.com>, Andrew Morton <akpm@osdl.org>,
       Chris Wright <chrisw@osdl.org>, Linus Torvalds <torvalds@osdl.org>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Virtualization Mailing List <virtualization@lists.osdl.org>,
       Zwane Mwaikambo <zwane@arm.linux.org.uk>,
       Martin Bligh <mbligh@mbligh.org>,
       Pratap Subrahmanyam <pratap@vmware.com>,
       Christopher Li <chrisl@vmware.com>,
       "Eric W. Biederman" <ebiederm@xmission.com>
Subject: Re: [PATCH 14/21] i386 Apm is on cpu zero only
References: <200511080433.jA84Xwm7009921@zach-dev.vmware.com> <20051108073315.GE28201@elte.hu>
In-Reply-To: <20051108073315.GE28201@elte.hu>
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Ingo Molnar wrote:
> * Zachary Amsden <zach@vmware.com> wrote:
> 
> 
>>APM BIOS code has a protective wrapper that runs it only on CPU zero.  
>>Thus, no need to set APM BIOS segments in the GDT for other CPUs.
> 
> hm, do we want (need) to have that CPU#0 assumption forever?
> 

APM BIOS should only ever run on the BSP, and I believe in Linux the BSP 
is always 0.  Since APM is obsolete, there is no future to consider.

	-hpa
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