From mboxrd@z Thu Jan 1 00:00:00 1970 From: Russ Anderson Subject: Re: [PATCH V2] Change ACPI IPMI support to "default y" Date: Thu, 20 Feb 2014 17:01:26 -0600 Message-ID: <20140220230126.GA13558@sgi.com> References: <1392740909-2079-1-git-send-email-matthew.garrett@nebula.com> Reply-To: Russ Anderson Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from relay3.sgi.com ([192.48.152.1]:34041 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751862AbaBTXBa (ORCPT ); Thu, 20 Feb 2014 18:01:30 -0500 Content-Disposition: inline In-Reply-To: <1392740909-2079-1-git-send-email-matthew.garrett@nebula.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Matthew Garrett Cc: minyard@acm.org, lenb@kernel.org, rjw@rjwysocki.net, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, rja@sgi.com On Tue, Feb 18, 2014 at 11:28:29AM -0500, 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. Could you be more specific? Is the problem kernel code trying to use IPMI functionality before the ipmi_si driver is loaded? Or something else? What is the "undesirable system behaviour"? > Set the default to Y in order to encourage distributions and > users to configure kernels to avoid awkward surprises. What are the "awkward surprises"? Thanks, -- Russ Anderson, Kernel and Performance Software Team Manager SGI - Silicon Graphics Inc rja@sgi.com