From owner-freebsd-current Thu Oct 17 14:52:56 2002 Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3E8DA37B401; Thu, 17 Oct 2002 14:52:54 -0700 (PDT) Received: from obsecurity.dyndns.org (adsl-64-165-226-88.dsl.lsan03.pacbell.net [64.165.226.88]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4D98143E7B; Thu, 17 Oct 2002 14:52:53 -0700 (PDT) (envelope-from kris@obsecurity.org) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id CEE8466C7B; Thu, 17 Oct 2002 14:52:52 -0700 (PDT) Date: Thu, 17 Oct 2002 14:52:52 -0700 From: Kris Kennaway To: current@FreeBSD.org, dillon@FreeBSD.org Subject: Page fault in swapout_procs Message-ID: <20021017215252.GA50026@xor.obsecurity.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.4i Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG I just got the following panic on one of the gohan machines, running a somewhat recent -current: Fatal trap 12: page fault while in kernel mode fault virtual address = 0xa0 fault code = supervisor write, page not present instruction pointer = 0x8:0xc035d0ab stack pointer = 0x10:0xcd25ccc0 frame pointer = 0x10:0xcd25cce0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 3 (vmdaemon) kernel: type 12 trap, code=0 Stopped at swapout_procs+0x6b: incl 0xa0(%esi) db> Context switches not allowed in the debugger. db> trace swapout_procs(1,0,68,c0411018,0) at swapout_procs+0x6b vm_daemon(0,cd25cd48,c03f1300,34b,0) at vm_daemon+0x6e fork_exit(c036b560,0,cd25cd48) at fork_exit+0xaf fork_trampoline() at fork_trampoline+0x17 The kernel was compiled on September 8: FreeBSD 5.0-CURRENT #2: Sun Sep 8 01:53:39 PDT 2002 gdb on the core seems to have something slightly different to say about the backtrace: --- Fatal trap 12: page fault while in kernel mode fault virtual address = 0xa0 fault code = supervisor write, page not present instruction pointer = 0x8:0xc035d0ab stack pointer = 0x10:0xcd25ccc0 frame pointer = 0x10:0xcd25cce0 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 3 (vmdaemon) panic: from debugger Fatal trap 3: breakpoint instruction fault while in kernel mode instruction pointer = 0x8:0xc03999a4 stack pointer = 0x10:0xcd25ca48 frame pointer = 0x10:0xcd25ca54 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = IOPL = 0 current process = 3 (vmdaemon) panic: from debugger Uptime: 7h28m29s Dumping 254 MB ata0: resetting devices .. done 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 --- #0 doadump () at /local0/scratch/sys/kern/kern_shutdown.c:213 213 /local0/scratch/sys/kern/kern_shutdown.c: No such file or directory. in /local0/scratch/sys/kern/kern_shutdown.c (kgdb) bt #0 doadump () at /local0/scratch/sys/kern/kern_shutdown.c:213 #1 0xc02422b5 in boot (howto=260) at /local0/scratch/sys/kern/kern_shutdown.c:345 #2 0xc02424e8 in panic () at /local0/scratch/sys/kern/kern_shutdown.c:493 #3 0xc0161e22 in db_panic () at /local0/scratch/sys/ddb/db_command.c:449 #4 0xc0161da2 in db_command (last_cmdp=0xc0427aa0, cmd_table=0xc03ccbc8, aux_cmd_tablep=0xc0ee79c0, aux_cmd_tablep_end=0x104) at /local0/scratch/sys/ddb/db_command.c:345 #5 0xc0161eb6 in db_command_loop () at /local0/scratch/sys/ddb/db_command.c:471 #6 0xc0164a8a in db_trap (type=12, code=0) at /local0/scratch/sys/ddb/db_trap.c:72 #7 0xc0399702 in kdb_trap (type=12, code=0, regs=0xcd25cc80) at /local0/scratch/sys/i386/i386/db_interface.c:160 #8 0xc03a9a43 in trap_fatal (frame=0xcd25cc80, eva=0) at /local0/scratch/sys/i386/i386/trap.c:841 #9 0xc03a9752 in trap_pfault (frame=0xcd25cc80, usermode=0, eva=160) at /local0/scratch/sys/i386/i386/trap.c:760 #10 0xc03a927d in trap (frame= {tf_fs = -853213160, tf_es = -1069350896, tf_ds = 16, tf_edi = 100000, tf_esi = 0, tf_ebp = -853160736, tf_isp = -853160788, tf_ebx = -1025123020, tf_edx = 4, tf_ecx = 1, tf_eax = 1, tf_trapno = 12, tf_err = 2, tf_eip = -1070214997, tf_cs = 8, tf_eflags = 66178, tf_esp = -1069298464, tf_ss = -1069486848}) at /local0/scratch/sys/i386/i386/trap.c:446 #11 0xc039ae68 in calltrap () at {standard input}:98 #12 0xc036b5ce in vm_daemon () at /local0/scratch/sys/vm/vm_pageout.c:1476 #13 0xc022e72f in fork_exit (callout=0xc036b560 , arg=0x0, frame=0x0) at /local0/scratch/sys/kern/kern_fork.c:851 Kris To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message