Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Thu, 11 Oct 2001 03:37:50 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Thu, 11 Oct 2001 03:37:40 -0400 Received: from ns.itep.ru ([193.124.224.35]:54023 "EHLO ns.itep.ru") by vger.kernel.org with ESMTP id ; Thu, 11 Oct 2001 03:37:32 -0400 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15301.19500.30733.197896@jaguar.itep.ru> Date: Thu, 11 Oct 2001 11:37:16 +0400 From: Roman Kagan To: linux-kernel@vger.kernel.org Subject: Re: 2.4.11 APIC problems X-Mailer: VM 6.96 under Emacs 20.7.1 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org I had exactly the same problem on my HP e800. I've tried to identify what had changed between 2.4.10 and 2.4.11 in IO-APIC code, and I've found out that probably the only change relevant to my uniprocessor case is the change of the initial value of dest_mode field in struct IO_APIC_route_entry in setup_IO_APIC_irqs() and setup_ExtINT_IRQ0_pin() in arch/i386/kernel/io_apic.c from 1 to macro INT_DELIVERY_MODE, which for uniprocessors was defined to be 0. I don't claim I understand whether it is right or wrong, but the following patch can fix _my_ problem: --- linux/include/asm-i386/smp.h.int_delivery Wed Oct 10 13:36:11 2001 +++ linux/include/asm-i386/smp.h Wed Oct 10 18:17:06 2001 @@ -31,7 +31,7 @@ # define INT_DELIVERY_MODE 1 /* logical delivery broadcast to all procs */ # endif #else -# define INT_DELIVERY_MODE 0 /* physical delivery on LOCAL quad */ +# define INT_DELIVERY_MODE 1 /* logical delivery */ # define TARGET_CPUS 0x01 #endif Cheers, Roman. - 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/