From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753922AbbAUO0a (ORCPT ); Wed, 21 Jan 2015 09:26:30 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:51353 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753166AbbAUO0V (ORCPT ); Wed, 21 Jan 2015 09:26:21 -0500 From: "Rafael J. Wysocki" To: Jiang Liu Cc: Thomas Gleixner , Bjorn Helgaas , Yinghai Lu , Borislav Petkov , Len Brown , Tony Luck , x86@kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-acpi@vger.kernel.org Subject: Re: [RFC Patch 08/19] ACPI: Add prefetch decoding to the address space parser Date: Wed, 21 Jan 2015 15:48:57 +0100 Message-ID: <2824802.T2m64639rV@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.16.0-rc5+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <54BF3881.9000708@linux.intel.com> References: <1420684386-5975-1-git-send-email-jiang.liu@linux.intel.com> <1593565.fJ4zH7YgDd@vostro.rjw.lan> <54BF3881.9000708@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday, January 21, 2015 01:26:25 PM Jiang Liu wrote: > On 2015/1/21 8:35, Rafael J. Wysocki wrote: > > On Thursday, January 08, 2015 10:32:55 AM Jiang Liu wrote: > >> From: Thomas Gleixner > >> > >> Add support of PREFETCH attributre to ACPI address space and extended > >> address space parser. > > > > This potentially enables untested configurations which tends to uncover bugs, > > so I'm concerned. > > > > What's the possible impact of this? > Hi Rafael, > I have analyzed all call sites related to this change, most > users just care about resource type(IO, MEM, IRQ etc) and ignore > the prefetch property. Seems only PCI subsystem cares about PREFETCH. OK -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.