From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vladimir G. Ivanovic" Subject: Re: WARNING: unexpected IO-APIC Date: Tue, 09 Jul 2002 09:44:30 -0700 Sender: linux-smp-owner@vger.kernel.org Message-ID: <200207091644.g69GiUW12383@bach.leonora.org> References: Mime-Version: 1.0 (generated by tm-edit 1.8) Return-path: In-Reply-To: Your message of "Mon, 08 Jul 2002 16:22:07 EDT." List-Id: Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-smp@vger.kernel.org I vaguely remember that there's a kernel configuration parameter that controls this.... --- Vladimir -------- Vladimir G. Ivanovic http://leonora.org/~vladimir 2770 Cowper St. vladimir@acm.org Palo Alto, CA 94306-2447 +1 650 678 8014 "ERB" == E Robert Bogusta writes: ERB> On Mon, 8 Jul 2002, Vladimir G. Ivanovic wrote: >> I found that I do not need to turn off IO-APIC if I backed down from MPS >> 1.4 to 1.1. >> >> Apparently some (all?) Xeon-based boards need to do both, but ASUS CUV4X >> boards do not. Turning off IO-APIC support needlessly imposes a >> (probably small) performance penalty on ASUS owners. >> >> Since other ASUS owners have reported success on this list when >> just backing down from MPS 1.4, I feel confident that it works. >> >> Please incorporate this advice into your FAQ. ERB> Some IBM Netfinity machines will have problems initializing the ERB> onboard SCSI controller if MPS 1.1 is selected. Each possible LUB ERB> of each possible device on each possible bus will be queried with ERB> a timeout. Booting takes a uselessly long time. ERB> -- ERB> -rob bogus