From owner-freebsd-current Wed Nov 20 2:17:52 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 085FC37B401 for ; Wed, 20 Nov 2002 02:17:49 -0800 (PST) Received: from outel.org (outel.org [168.150.177.152]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0851343E42 for ; Wed, 20 Nov 2002 02:17:48 -0800 (PST) (envelope-from qumqats@outel.org) Received: from localhost (winxp [192.168.1.20]) by outel.org (8.12.6/8.12.6) with ESMTP id gAKAHTuE054609 for ; Wed, 20 Nov 2002 02:17:32 -0800 (PST) (envelope-from qumqats@outel.org) Date: Wed, 20 Nov 2002 02:17:18 -0800 From: "Joel M. Baldwin" To: current@freebsd.org Subject: panic: sleeping thread owns a mutex - with debug traceback Message-ID: <167309338.1037758638@[192.168.1.20]> X-Mailer: Mulberry/3.0.0 (Win32) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Content-Disposition: inline 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 Under heavy system load and heavy swapping I had the following panic occur. ------------------------------------------------------------- Panic message from the serial console: panic: sleeping thread owns a mutex cpuid = 1; lapic.id = 01000000 Debugger("panic") Stopped at Debugger+0x55: xchgl %ebx,in_Debugger.0 db> panic     t Debugger(c0392fc9,1000000,c0392171,cd29ac18,1) at Debugger+0x55 panic(c0392171,1,c03920e8,6b,c039614a) at panic+0x11f propagate_priority(c0eadc40,2,c03920e8,23b,c03cffa0) at propagate_priority+0x104 _mtx_lock_sleep(c3520a20,0,c039f4dd,182,c040af98) at _mtx_lock_sleep+0x219 _mtx_lock_flags(c3520a20,0,c039f4dd,182,c0393d1d) at _mtx_lock_flags+0x98 syncache_timer(1,0,c0393d1d,bf,220649) at syncache_timer+0xaf softclock(0,0,c0390a04,230,c0eac700) at softclock+0x19c ithread_loop(c0ea0600,cd29ad48,c0390767,355,0) at ithread_loop+0x182 fork_exit(c01fef40,c0ea0600,cd29ad48) at fork_exit+0xa5 fork_trampoline() at fork_trampoline+0x1a --- trap 0x1, eip = 0, esp = 0xcd29ad7c, ebp = 0 --- db> panic panic: from debugger cpuid = 1; lapic.id = 01000000 boot() called on cpu#1 Uptime: 6h11m40s pfs_vncache_unload(): 1 entries remaining Dumping 255 MB 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 Dump complete Automatic reboot in 15 seconds - press a key on the console to abort Rebooting... cpu_reset called on cpu#1 cpu_reset: Restarting BSP cpu_reset_proxy: Stopped CPU 1 -------------------------------------------------------------------- kgdb traceback information: su-2.05b# gdb -k GNU gdb 5.2.1 (FreeBSD) Copyright 2002 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "i386-undermydesk-freebsd". (kgdb) symbol-file /usr/src/sys/i386/compile/testGeneric.smp/kernel.debug Reading symbols from /usr/src/sys/i386/compile/testGeneric.smp/kernel.debug...done. (kgdb) exec-file /boot/kernel.testgeneric.smp/kernel (kgdb) core-file /var/crash/vmcore.30 panic: from debugger panic messages: --- panic: sleeping thread owns a mutex cpuid = 1; lapic.id = 01000000 panic: from debugger cpuid = 1; lapic.id = 01000000 boot() called on cpu#1 Uptime: 6h11m40s pfs_vncache_unload(): 1 entries remaining Dumping 255 MB 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 --- #0 doadump () at ../../../kern/kern_shutdown.c:232 232 dumping++; (kgdb) where #0 doadump () at ../../../kern/kern_shutdown.c:232 #1 0xc02118bd in boot (howto=260) at ../../../kern/kern_shutdown.c:364 #2 0xc0211b77 in panic () at ../../../kern/kern_shutdown.c:517 #3 0xc014d252 in db_panic () at ../../../ddb/db_command.c:450 #4 0xc014d1d2 in db_command (last_cmdp=0xc03bf2a0, cmd_table=0x0, aux_cmd_tablep=0xc03b5ec8, aux_cmd_tablep_end=0xc03b5ee0) at ../../../ddb/db_command.c:346 #5 0xc014d2e6 in db_command_loop () at ../../../ddb/db_command.c:472 #6 0xc014ff7a in db_trap (type=3, code=0) at ../../../ddb/db_trap.c:72 #7 0xc033e2a0 in kdb_trap (type=3, code=0, regs=0xcd29ab90) at ../../../i386/i386/db_interface.c:166 #8 0xc03572cf in trap (frame= {tf_fs = -1069547496, tf_es = 16, tf_ds = -1069744112, tf_edi = -1058350016, tf_esi = 256, tf_ebp = -852907044, tf_isp = -852907076, tf_ebx = 0, tf_edx = 0, tf_ecx = 1, tf_eax = 18, tf_trapno = 3, tf_err = 0, tf_eip = -1070340715, tf_cs = 8, tf_eflags = 662, tf_esp = -1069880826, tf_ss = -1069994039}) at ../../../i386/i386/trap.c:603 #9 0xc033fac8 in calltrap () at {standard input}:99 #10 0xc0211b5f in panic (fmt=0x0) at ../../../kern/kern_shutdown.c:503 #11 0xc0207b54 in propagate_priority (td=0x0) at ../../../kern/kern_mutex.c:125 #12 0xc0208329 in _mtx_lock_sleep (m=0xc3520a20, opts=0, file=0xc039f4dd "../../../netinet/tcp_syncache.c", line=386) at ../../../kern/kern_mutex.c:624 #13 0xc0207db8 in _mtx_lock_flags (m=0xc3520a20, opts=0, file=0xc039f4dd "../../../netinet/tcp_syncache.c", line=386) at ../../../kern/kern_mutex.c:325 #14 0xc029b9ef in syncache_timer (xslot=0x1) at ../../../netinet/tcp_syncache.c:386 #15 0xc021f51c in softclock (dummy=0x0) at ../../../kern/kern_timeout.c:195 #16 0xc01ff0c2 in ithread_loop (arg=0xc0ea0600) at ../../../kern/kern_intr.c:535 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message