Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751172AbVK3MEs (ORCPT ); Wed, 30 Nov 2005 07:04:48 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751202AbVK3MEs (ORCPT ); Wed, 30 Nov 2005 07:04:48 -0500 Received: from nproxy.gmail.com ([64.233.182.204]:32878 "EHLO nproxy.gmail.com") by vger.kernel.org with ESMTP id S1751172AbVK3MEs convert rfc822-to-8bit (ORCPT ); Wed, 30 Nov 2005 07:04:48 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=KMDWW6WEpjGc/6cUAS4Twe0idp/yWEfFlXe7jzv6S92yYuDTeOTEaZug2scbg6ZTLA0OQVz+FNOnRt2kSU9489BD59CGezcR+mtDTjmGqfh6yG06tAihORcVI/MQTvXNDwkD/6NBp3WBxi8x8DlgPMs4Sh5Q6kQMkIqPwCJypWo= Message-ID: <6278d2220511300404i27878f02mf5d8c948256d36e8@mail.gmail.com> Date: Wed, 30 Nov 2005 12:04:46 +0000 From: Daniel J Blueman To: jgarzik@pobox.com, Linux Kernel Subject: Re: PAT status? MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 607 Lines: 16 Hi Jeff, IIRC, the kernel (c. 2.6.14) still does nothing to setup the processors' PAT registers to enable write combining in one of the slots - the defaults the BIOS establishes do not cover this. Once this is done, drivers would readily be able to set page flags for a particular PAT slot, and MTRRs can (almost) be safely ignored. Daniel ___ Daniel J Blueman - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/