From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pd0-f175.google.com (mail-pd0-f175.google.com [209.85.192.175]) by kanga.kvack.org (Postfix) with ESMTP id 1A9DD6B003A for ; Tue, 15 Jul 2014 16:10:40 -0400 (EDT) Received: by mail-pd0-f175.google.com with SMTP id v10so7671793pde.34 for ; Tue, 15 Jul 2014 13:10:39 -0700 (PDT) Received: from mail.zytor.com (terminus.zytor.com. [2001:1868:205::10]) by mx.google.com with ESMTPS id ou8si6271787pdb.505.2014.07.15.13.10.38 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 15 Jul 2014 13:10:39 -0700 (PDT) Message-ID: <53C58A9C.6070906@zytor.com> Date: Tue, 15 Jul 2014 13:10:04 -0700 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [RFC PATCH 0/11] Support Write-Through mapping on x86 References: <1405452884-25688-1-git-send-email-toshi.kani@hp.com> In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Andy Lutomirski , Toshi Kani Cc: Thomas Gleixner , Ingo Molnar , Andrew Morton , Arnd Bergmann , Konrad Rzeszutek Wilk , plagnioj@jcrosoft.com, tomi.valkeinen@ti.com, "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , Stefan Bader , Dave Airlie , Borislav Petkov On 07/15/2014 12:53 PM, Andy Lutomirski wrote: > > Note that MTRRs are already partially deprecated: all drivers *should* > be using arch_phys_wc_add, not mtrr_add, and arch_phys_wc_add is a > no-op on systems with working PAT. > > Unfortunately, I never finished excising mtrr_add. Finishing the job > wouldn't be very hard. > The use of MTRRs in drivers is separate from the MTRR global setup done by the firmware, though. -hpa -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org