Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753691AbaBRXUz (ORCPT ); Tue, 18 Feb 2014 18:20:55 -0500 Received: from v094114.home.net.pl ([79.96.170.134]:59712 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753131AbaBRXUx (ORCPT ); Tue, 18 Feb 2014 18:20:53 -0500 From: "Rafael J. Wysocki" To: Matthew Garrett Cc: "lenb@kernel.org" , "linux-kernel@vger.kernel.org" , "minyard@acm.org" , "linux-acpi@vger.kernel.org" Subject: Re: [PATCH V2] Change ACPI IPMI support to "default y" Date: Wed, 19 Feb 2014 00:35:43 +0100 Message-ID: <1920764.8Poj9R8nZQ@vostro.rjw.lan> User-Agent: KMail/4.11.5 (Linux/3.13.0+; KDE/4.11.5; x86_64; ; ) In-Reply-To: <1392765307.3488.1.camel@x230.lan> References: <1392740909-2079-1-git-send-email-matthew.garrett@nebula.com> <1511662.Ly2fOjCGKz@vostro.rjw.lan> <1392765307.3488.1.camel@x230.lan> 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 Tuesday, February 18, 2014 11:15:08 PM Matthew Garrett wrote: > On Wed, 2014-02-19 at 00:26 +0100, Rafael J. Wysocki wrote: > > On Tuesday, February 18, 2014 11:28:29 AM Matthew Garrett wrote: > > > > > > The ACPI IPMI driver implements IPMI operation region support for the ACPI > > > core. Systems that declare ACPI operation regions may reference them at any > > > time, including during kernel initialisation. These accesses will fail > > > unless the ACPI IPMI driver is present, and undesirable system behaviour > > > may result. Set the default to Y in order to encourage distributions and > > > users to configure kernels to avoid awkward surprises. > > > > Do you have any examples of problems caused by that or is this just theoretical > > at the moment? > > For example, if you load the ACPI power meter driver before you've > installed the ACPI IPMI driver you'll typically get failures (most > vendors implement it via IPMI). Well, any specific machine from any specific vendor? -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- 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/