From owner-freebsd-bugs@FreeBSD.ORG Sat Aug 27 12:00:45 2005 Return-Path: X-Original-To: freebsd-bugs@hub.freebsd.org Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D408616A41F for ; Sat, 27 Aug 2005 12:00:45 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 76A4843D55 for ; Sat, 27 Aug 2005 12:00:44 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.13.3/8.13.3) with ESMTP id j7RC0i0k054361 for ; Sat, 27 Aug 2005 12:00:44 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.13.3/8.13.1/Submit) id j7RC0irK054360; Sat, 27 Aug 2005 12:00:44 GMT (envelope-from gnats) Resent-Date: Sat, 27 Aug 2005 12:00:44 GMT Resent-Message-Id: <200508271200.j7RC0irK054360@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Pegasus McCleaft Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 900DD16A41F for ; Sat, 27 Aug 2005 11:59:56 +0000 (GMT) (envelope-from ken@poseidon.alicorntech.com) Received: from poseidon.alicorntech.com (host86-132-224-167.range86-132.btcentralplus.com [86.132.224.167]) by mx1.FreeBSD.org (Postfix) with ESMTP id E5EAC43D45 for ; Sat, 27 Aug 2005 11:59:55 +0000 (GMT) (envelope-from ken@poseidon.alicorntech.com) Received: from poseidon.alicorntech.com (localhost.alicorntech.com [127.0.0.1]) by poseidon.alicorntech.com (8.13.4/8.13.4) with ESMTP id j7RBxr0u003702 for ; Sat, 27 Aug 2005 12:59:53 +0100 (BST) (envelope-from ken@poseidon.alicorntech.com) Received: (from ken@localhost) by poseidon.alicorntech.com (8.13.4/8.13.1/Submit) id j7RBxqKw003701; Sat, 27 Aug 2005 12:59:53 +0100 (BST) (envelope-from ken) Message-Id: <200508271159.j7RBxqKw003701@poseidon.alicorntech.com> Date: Sat, 27 Aug 2005 12:59:53 +0100 (BST) From: Pegasus McCleaft To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Cc: Subject: kern/85346: PREEMPTION causes unstability in Alpha4000 SMP kernel X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: Pegasus McCleaft List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 27 Aug 2005 12:00:45 -0000 >Number: 85346 >Category: kern >Synopsis: PREEMPTION causes unstability in Alpha4000 SMP kernel >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Sat Aug 27 12:00:43 GMT 2005 >Closed-Date: >Last-Modified: >Originator: Pegasus McCleaft >Release: FreeBSD 6.0-BETA3 alpha >Organization: >Environment: System: FreeBSD poseidon.alicorntech.com 6.0-BETA3 FreeBSD 6.0-BETA3 #4: Sat Aug 27 01:51:20 BST 2005 ken@poseidon.alicorntech.com:/usr/obj/usr/src/sys/Poseidon alpha >Description: The default option and build of a kernel for the 6.0 BETA3 is to have preemption enabled. This option seems to still cause problems on my machine after a few hours of running. The problems range between kernel traping to hard locking. If a kernel trap is presented, the usual message is a illegal address load within the syncer. (normally 0xffff....ff) >How-To-Repeat: Build and load any kernel with PREEMPTION enabled. Do large amounts of disk IO and ethernet, wait for the trap message (about 1 hour) >Fix: Remove the "options PREEMPTION" from the config file, rebuild kernel. I found that running the below script in another xterm keeps the machine running long enough to build the new kernel: while true do sync echo -n "Sleeping.." sleep 5 done >Release-Note: >Audit-Trail: >Unformatted: