Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S268588AbUJKArP (ORCPT ); Sun, 10 Oct 2004 20:47:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S268589AbUJKArP (ORCPT ); Sun, 10 Oct 2004 20:47:15 -0400 Received: from fw.osdl.org ([65.172.181.6]:18079 "EHLO mail.osdl.org") by vger.kernel.org with ESMTP id S268588AbUJKArL (ORCPT ); Sun, 10 Oct 2004 20:47:11 -0400 Date: Sun, 10 Oct 2004 17:47:05 -0700 (PDT) From: Linus Torvalds To: "Maciej W. Rozycki" cc: Len Brown , Andrew Morton , Kernel Mailing List , ACPI Developers Subject: Re: [BKPATCH] LAPIC fix for 2.6 In-Reply-To: Message-ID: References: <1097429707.30734.21.camel@d845pe> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 877 Lines: 23 On Sun, 10 Oct 2004, Maciej W. Rozycki wrote: > > Hmm, any particular reason to keep the local APIC disabled by default? Yes. It changes interrupt handling, so any SMM stuff tends to break on BIOSes that don't know about APICs. Things like the magic keys etc. It apparently also breaks some ACPI stuff (likely AML code that "knows" that interrupts are done with the legacy controller). Mostly a laptop issue, I suspect - simply because desktops don't do anything strange these days. So the default is the "safe" settings. And if you care, and your machine works with the APIC, the command line thing is available. Linus - 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/