From owner-freebsd-bugs@FreeBSD.ORG Tue May 27 05:40:14 2003 Return-Path: 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 8AF2537B401 for ; Tue, 27 May 2003 05:40:14 -0700 (PDT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6893243F93 for ; Tue, 27 May 2003 05:40:13 -0700 (PDT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.9/8.12.9) with ESMTP id h4RCeDUp021829 for ; Tue, 27 May 2003 05:40:13 -0700 (PDT) (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.9/8.12.9/Submit) id h4RCeDek021828; Tue, 27 May 2003 05:40:13 -0700 (PDT) Resent-Date: Tue, 27 May 2003 05:40:13 -0700 (PDT) Resent-Message-Id: <200305271240.h4RCeDek021828@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, Bryan Liesner Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 5000737B408 for ; Tue, 27 May 2003 05:30:47 -0700 (PDT) Received: from gravy.homeunix.net (pool-151-197-48-53.phil.east.verizon.net [151.197.48.53]) by mx1.FreeBSD.org (Postfix) with ESMTP id 07EA343F93 for ; Tue, 27 May 2003 05:30:44 -0700 (PDT) (envelope-from bryan@gravy.homeunix.net) Received: (from root@localhost) by gravy.homeunix.net (8.12.9/8.12.9) id h4RCUiAq003492; Tue, 27 May 2003 08:30:44 -0400 (EDT) (envelope-from bryan) Message-Id: <200305271230.h4RCUiAq003492@gravy.homeunix.net> Date: Tue, 27 May 2003 08:30:44 -0400 (EDT) From: Bryan Liesner To: FreeBSD-gnats-submit@FreeBSD.org X-Send-Pr-Version: 3.113 Subject: kern/52718: changes to kern_umtx.c causes panic in cam X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Bryan Liesner List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 27 May 2003 12:40:14 -0000 >Number: 52718 >Category: kern >Synopsis: changes to kern_umtx.c causes panic in cam >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Tue May 27 05:40:12 PDT 2003 >Closed-Date: >Last-Modified: >Originator: Bryan Liesner >Release: FreeBSD 5.1-BETA i386 >Organization: >Environment: System: FreeBSD gravy.homeunix.net 5.1-BETA FreeBSD 5.1-BETA #0: Mon May 26 15:49:23 EDT 2003 bryan@gravy.homeunix.net:/usr/obj/usr/src/sys/GRAVY i386 >Description: The change from kern_umtx.c rev 1.2 to 1.3 brought out the following panic on my system. The panic does not occur if I revert back to 1.2 or if I turn off my USB hard drive (uses EHCI) and run with rev 1.3 Fatal trap 12: page fault while in kernel mode fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xc0135b0a7 stack pointer = 0x10:0xd68f2c48 frame pointer = 0x10:0xd68f2c64 code segment = base 0x0 limit 0xffff, type 0x1b processor eflags = interrupt enabled, resume, IOPL=0 current process = 12 (swi7: tty:sio clock) trap number = 12 panic page fault DDB says it was in heap_up+0x27 ... (kgdb) l *heap_up+0x27 0xc0136be7 is in heap_up (../../../cam/cam_queue.c:345). 340 * equal too, or greater than j respectively. 341 */ 342 static __inline int 343 queue_cmp(cam_pinfo **queue_array, int i, int j) 344 { 345 if (queue_array[i]->priority == queue_array[j]->priority) 346 return ( queue_array[i]->generation 347 - queue_array[j]->generation ); 348 else 349 return ( queue_array[i]->priority (kgdb) 350 - queue_array[j]->priority ); 351 } 352 353 /* 354 * swap: Given an array of cam_pinfo* elements and indexes i and j, 355 * exchange elements i and j. 356 */ 357 static __inline void 358 swap(cam_pinfo **queue_array, int i, int j) 359 { >How-To-Repeat: boot the system >Fix: >Release-Note: >Audit-Trail: >Unformatted: