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Date: Tue, 14 Nov 2006 13:40:06 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: "Eric W. Biederman" <ebiederm@xmission.com>
CC: Pavel Machek <pavel@suse.cz>, Vivek Goyal <vgoyal@in.ibm.com>,
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Subject: Re: [RFC] [PATCH 10/16] x86_64: 64bit PIC ACPI wakeup
References: <20061113162135.GA17429@in.ibm.com>	<20061113164314.GK17429@in.ibm.com> <20061114163002.GB4445@ucw.cz> <m1fyclk8ws.fsf@ebiederm.dsl.xmission.com>
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Eric W. Biederman wrote:
> 
>> Why is PGE no longer required, for example?
> 
> PGE is never required.  Especially on a temporary page table.
> PGE is an optimization, to make context switches faster.
> 

You cannot, however, set the Global bit unless PGE is supported by the 
CPU (you'll trap.)

	-hpa