Hi. Upgraded to -current last night and got the following panic. The panic seems to be fairly repeatable and is triggered by a minute or so's worth of database activity with mysqld. The version of mysql is 3.23.58_1 from ports, linked against libpthread; using libmap.conf to force usage of libc_r avoids the panic, so it's definitely a thread/KSE issue. (Also note the oddness of the backtrace in the frames between doreti_ast and sched_switch -- is this normal, is the stack mangled, or is gdb just hallucinating?) My kernel config is fairly unexceptional and is attached to the end after the gdb script. Oh yes, this is on a dual PII/400 system. Script started on Fri Aug 20 15:15:26 2004 GNU gdb 20040720 [GDB v6.x for FreeBSD] Copyright 2004 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-portbld-freebsd5.2"... panic: kernel trap doesn't have ucred panic messages: --- panic: kernel trap doesn't have ucred cpuid = 0; boot() called on cpu#0 Uptime: 14m27s Dumping 638 MB 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256 272 288 304 320 336 352 368 384 400 416 432 448 464 480 496 512 528 544 560 576 592 608 624 --- #0 doadump () at pcpu.h:159 159 __asm __volatile("movl %%fs:0,%0" : "=r" (td)); doadump () at pcpu.h:159 159 __asm __volatile("movl %%fs:0,%0" : "=r" (td)); (kgdb) bt #0 doadump () at pcpu.h:159 #1 0xc0615c14 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:396 #2 0xc0615f33 in panic (fmt=0xc085ff0d "kernel trap doesn't have ucred") at /usr/src/sys/kern/kern_shutdown.c:558 #3 0xc07c7570 in trap (frame= {tf_fs = -1067450344, tf_es = -1064042480, tf_ds = 16, tf_edi = -1036714944, tf_esi = -1034233440, tf_ebp = -548918068, tf_isp = -548918104, tf_ebx = 0, tf_edx = 4, tf_ecx = 0, tf_eax = -1036714944, tf_trapno = 12, tf_err = 0, tf_eip = -1067372413, tf_cs = 8, tf_eflags = 66118, tf_esp = 0, tf_ss = -1065121135}) at /usr/src/sys/i386/i386/trap.c:413 #4 0xc07b68da in calltrap () at /usr/src/sys/i386/i386/exception.s:140 #5 0xc0600018 in exec_copyout_strings (imgp=0x0) at /usr/src/sys/kern/kern_exec.c:996 #6 0xc06066fb in thread_alloc_spare (td=0x6cb) at /usr/src/sys/kern/kern_kse.c:1021 #7 0xc0606a2f in thread_user_enter (p=0xc234fc40, td=0xc25ad9a0) at /usr/src/sys/kern/kern_kse.c:1182 #8 0xc0633788 in ast (framep=0xdf482d48) at /usr/src/sys/kern/subr_trap.c:166 #9 0xc07b724d in doreti_ast () at /usr/src/sys/i386/i386/exception.s:294 #10 0xdf482d48 in ?? () #11 0x0000002f in ?? () #12 0x0000002f in ?? () #13 0x0000002f in ?? () #14 0x0b113600 in ?? () #15 0x0832e000 in ?? () #16 0xbfbfe578 in ?? () #17 0xdf482d74 in ?? () #18 0x2032b83c in ?? () #19 0x0b0f6600 in ?? () #20 0x08328900 in ?? () #21 0x00000000 in ?? () #22 0x00000016 in ?? () #23 0x00000002 in ?? () #24 0x20327d3f in ?? () #25 0x0000001f in ?? () #26 0x00000202 in ?? () #27 0xbfbfe54c in ?? () #28 0x0000002f in ?? () #29 0x00000000 in ?? () #30 0x00000000 in ?? () #31 0x00000000 in ?? () #32 0x00000000 in ?? () #33 0x07dda000 in ?? () #34 0xc1bfc420 in ?? () #35 0xc1ca0280 in ?? () #36 0xdf482c9c in ?? () #37 0xdf482c84 in ?? () #38 0xc25ad9a0 in ?? () #39 0xc062570b in sched_switch (td=0x2032b83c, newtd=0xb113600) ---Type <return> to continue, or q <return> to quit--- at /usr/src/sys/kern/sched_ule.c:1207 Previous frame inner to this frame (corrupt stack?) (kgdb) fr 3 #3 0xc07c7570 in trap (frame= {tf_fs = -1067450344, tf_es = -1064042480, tf_ds = 16, tf_edi = -1036714944, tf_esi = -1034233440, tf_ebp = -548918068, tf_isp = -548918104, tf_ebx = 0, tf_edx = 4, tf_ecx = 0, tf_eax = -1036714944, tf_trapno = 12, tf_err = 0, tf_eip = -1067372413, tf_cs = 8, tf_eflags = 66118, tf_esp = 0, tf_ss = -1065121135}) at /usr/src/sys/i386/i386/trap.c:413 413 KASSERT(cold || td->td_ucred != NULL, (kgdb) p td $1 = (struct thread *) 0xc25ad9a0 (kgdb) p *td $2 = {td_proc = 0xc234fc40, td_ksegrp = 0xc1e42630, td_plist = { tqe_next = 0xc201cb00, tqe_prev = 0xc2ab8428}, td_kglist = { tqe_next = 0x0, tqe_prev = 0xc2ab9850}, td_slpq = {tqe_next = 0xc2ab9840, tqe_prev = 0xdf64fc78}, td_lockq = {tqe_next = 0x0, tqe_prev = 0x0}, td_runq = {tqe_next = 0x0, tqe_prev = 0xc1e42654}, td_selq = { tqh_first = 0x0, tqh_last = 0xc25ad9d0}, td_sleepqueue = 0xc2a19320, td_turnstile = 0xc2428dc0, td_tid = 100183, td_flags = 65538, td_inhibitors = 0, td_pflags = 128, td_last_kse = 0xc1ca0280, td_kse = 0xc1ca0280, td_dupfd = 0, td_wchan = 0x0, td_wmesg = 0x0, td_lastcpu = 0 '\0', td_oncpu = 0 '\0', td_locks = 0, td_blocked = 0x0, td_ithd = 0x0, td_lockname = 0x0, td_contested = {lh_first = 0x0}, td_sleeplocks = 0x0, td_intr_nesting_level = 0, td_pinned = 0, td_mailbox = 0x0, td_ucred = 0x0, td_standin = 0xc2ae09a0, td_prticks = 0, td_upcall = 0xc26cb000, td_sticks = 1437, td_uuticks = 0, td_usticks = 1, td_intrval = 0, td_oldsigmask = {__bits = {0, 0, 0, 0}}, td_sigmask = { __bits = {4294901503, 4294967295, 4294967295, 4294967295}}, td_siglist = { __bits = {0, 0, 0, 0}}, td_waitset = 0x0, td_umtx = {tqe_next = 0x0, tqe_prev = 0x0}, td_generation = 3, td_sigstk = {ss_sp = 0x0, ss_size = 0, ss_flags = 0}, td_kflags = 0, td_xsig = 0, td_profil_addr = 0, td_profil_ticks = 0, td_base_pri = 104 'h', td_priority = 160 ' ', td_pcb = 0xdf482da0, td_state = TDS_RUNNING, td_retval = {0, 185558528}, td_slpcallout = {c_links = {sle = {sle_next = 0xc2ab995c}, tqe = { tqe_next = 0xc2ab995c, tqe_prev = 0xce9ef790}}, c_time = 92526, c_arg = 0xc25ad9a0, c_func = 0, c_flags = 8}, td_frame = 0xdf482d48, td_kstack_obj = 0xc2490e70, td_kstack = 3746041856, td_kstack_pages = 2, td_altkstack_obj = 0x0, td_altkstack = 0, td_altkstack_pages = 0, td_critnest = 1, td_md = {md_savecrit = 582}, td_sched = 0xc25adafc} (kgdb) p *td->td_proc $3 = {p_list = {le_next = 0xc215be00, le_prev = 0xc244a700}, p_ksegrps = { tqh_first = 0xc29335a0, tqh_last = 0xc1e42634}, p_threads = { tqh_first = 0xc2ae0420, tqh_last = 0xc25ab848}, p_suspended = { tqh_first = 0x0, tqh_last = 0xc234fc58}, p_ucred = 0xc2188c80, p_fd = 0xc2164900, p_fdtol = 0x0, p_stats = 0xdf356000, p_limit = 0xc2163a00, p_upages_obj = 0xc23144a4, p_sigacts = 0xc240d000, p_flag = 49410, p_sflag = 1, p_state = PRS_NORMAL, p_pid = 688, p_hash = { le_next = 0x0, le_prev = 0xc1ba8ac0}, p_pglist = {le_next = 0x0, le_prev = 0xc234fe54}, p_pptr = 0xc234fe00, p_sibling = {le_next = 0x0, le_prev = 0xc234fe68}, p_children = {lh_first = 0x0}, p_mtx = { mtx_object = {lo_class = 0xc08a00bc, lo_name = 0xc08385cb "process lock", lo_type = 0xc08385cb "process lock", lo_flags = 4390912, lo_list = { tqe_next = 0xc234fe6c, tqe_prev = 0xc234fafc}, lo_witness = 0xc09154a0}, mtx_lock = 4, mtx_recurse = 0}, p_oppid = 0, p_vmspace = 0xc201e000, p_swtime = 0, p_realtimer = {it_interval = { tv_sec = 0, tv_usec = 0}, it_value = {tv_sec = 29667, tv_usec = 310390}}, p_runtime = {sec = 74, frac = 9024260264433929926}, p_uu = 17286797, p_su = 48742844, p_iu = 1, p_uticks = 2515, p_sticks = 9030, p_iticks = 0, p_profthreads = 0, p_maxthrwaits = 0, p_traceflag = 0, p_tracevp = 0x0, p_tracecred = 0x0, p_textvp = 0xc2420b58, p_siglist = {__bits = {0, 0, 0, 0}}, p_lock = 0 '\0', p_sigiolst = { slh_first = 0x0}, p_sigparent = 20, p_sig = 0, p_code = 0, p_stops = 0, p_stype = 0, p_step = 0 '\0', p_pfsflags = 0 '\0', p_nlminfo = 0x0, p_aioinfo = 0x0, p_singlethread = 0x0, p_suspcount = 0, p_xthread = 0x0, p_magic = 3203398350, p_comm = "mysqld", '\0' <repeats 13 times>, p_pgrp = 0xc1f8b6c0, p_sysent = 0xc08e2360, p_args = 0xc233cd00, p_cpulimit = 9223372036854775807, p_nice = 0 '\0', p_xstat = 0, p_klist = { kl_lock = 0xc234fcac, kl_list = {slh_first = 0x0}}, p_numthreads = 7, p_numksegrps = 6, p_md = {md_ldt = 0xc23d98c0}, p_itcallout = {c_links = { sle = {sle_next = 0x0}, tqe = {tqe_next = 0x0, tqe_prev = 0xce9dcea8}}, c_time = 2966609, c_arg = 0xc234fc40, c_func = 0xc0620c88 <realitexpire>, c_flags = 14}, p_uarea = 0xdf356000, p_acflag = 0, p_ru = 0x0, p_peers = 0x0, p_leader = 0xc234fc40, p_emuldata = 0x0, p_label = 0x0, p_sched = 0xc234fe00} (kgdb) q Script done on Fri Aug 20 15:16:48 2004 kernel config file below: # # GENERIC -- Generic kernel configuration file for FreeBSD/i386 # # For more information on this file, please read the handbook section on # Kernel Configuration Files: # # http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html # # The handbook is also available locally in /usr/share/doc/handbook # if you've installed the doc distribution, otherwise always see the # FreeBSD World Wide Web server (http://www.FreeBSD.org/) for the # latest information. # # An exhaustive list of options and more detailed explanations of the # device lines is also present in the ../../conf/NOTES and NOTES files. # If you are in doubt as to the purpose or necessity of a line, check first # in NOTES. # # $FreeBSD: src/sys/i386/conf/GENERIC,v 1.413 2004/08/11 01:34:18 rwatson Exp $ machine i386 cpu I686_CPU ident GENERIC # To statically compile in device wiring instead of /boot/device.hints #hints "GENERIC.hints" # Default places to look for devices. makeoptions DEBUG=-g # Build kernel with gdb(1) debug symbols options SCHED_ULE # ULE scheduler options INET # InterNETworking options INET6 # IPv6 communications protocols options FFS # Berkeley Fast Filesystem options SOFTUPDATES # Enable FFS soft updates support options UFS_ACL # Support for access control lists options UFS_DIRHASH # Improve performance on big directories options MD_ROOT # MD is a potential root device options NFSCLIENT # Network Filesystem Client options NFSSERVER # Network Filesystem Server options NFS_ROOT # NFS usable as /, requires NFSCLIENT options MSDOSFS # MSDOS Filesystem options CD9660 # ISO 9660 Filesystem options PROCFS # Process filesystem (requires PSEUDOFS) options PSEUDOFS # Pseudo-filesystem framework options GEOM_GPT # GUID Partition Tables. options COMPAT_43 # Compatible with BSD 4.3 [KEEP THIS!] options COMPAT_FREEBSD4 # Compatible with FreeBSD4 options SCSI_DELAY=15000 # Delay (in ms) before probing SCSI options KTRACE # ktrace(1) support options SYSVSHM # SYSV-style shared memory options SYSVMSG # SYSV-style message queues options SYSVSEM # SYSV-style semaphores options _KPOSIX_PRIORITY_SCHEDULING # POSIX P1003_1B real-time extensions options KBD_INSTALL_CDEV # install a CDEV entry in /dev options AHC_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~128k to driver. options AHD_REG_PRETTY_PRINT # Print register bitfields in debug # output. Adds ~215k to driver. options PFIL_HOOKS # pfil(9) framework options ADAPTIVE_GIANT # Giant mutex is adaptive. # Debugging for use in -current options KDB # Enable kernel debugger support. options DDB # Support DDB. options GDB # Support remote GDB. options INVARIANTS # Enable calls of extra sanity checking options INVARIANT_SUPPORT # Extra sanity checks of internal structures, required by INVARIANTS options WITNESS # Enable checks to detect deadlocks and cycles options WITNESS_SKIPSPIN # Don't run witness on spinlocks for speed # To make an SMP kernel, the next two are needed options SMP # Symmetric MultiProcessor Kernel device apic # I/O APIC # Bus support. Do not remove isa, even if you have no isa slots device isa device eisa device pci # Floppy drives device fdc # ATA and ATAPI devices device ata device atadisk # ATA disk drives device ataraid # ATA RAID drives device atapicd # ATAPI CDROM drives device atapifd # ATAPI floppy drives device atapist # ATAPI tape drives options ATA_STATIC_ID # Static device numbering # SCSI Controllers device ahb # EISA AHA1742 family device ahc # AHA2940 and onboard AIC7xxx devices device ahd # AHA39320/29320 and onboard AIC79xx devices device amd # AMD 53C974 (Tekram DC-390(T)) device isp # Qlogic family device mpt # LSI-Logic MPT-Fusion #device ncr # NCR/Symbios Logic device sym # NCR/Symbios Logic (newer chipsets + those of `ncr') device trm # Tekram DC395U/UW/F DC315U adapters device adv # Advansys SCSI adapters device adw # Advansys wide SCSI adapters device aha # Adaptec 154x SCSI adapters device aic # Adaptec 15[012]x SCSI adapters, AIC-6[23]60. device bt # Buslogic/Mylex MultiMaster SCSI adapters device ncv # NCR 53C500 device nsp # Workbit Ninja SCSI-3 device stg # TMC 18C30/18C50 # SCSI peripherals device scbus # SCSI bus (required for SCSI) device ch # SCSI media changers device da # Direct Access (disks) device sa # Sequential Access (tape etc) device cd # CD device pass # Passthrough device (direct SCSI access) device ses # SCSI Environmental Services (and SAF-TE) # RAID controllers interfaced to the SCSI subsystem device amr # AMI MegaRAID device asr # DPT SmartRAID V, VI and Adaptec SCSI RAID device ciss # Compaq Smart RAID 5* device dpt # DPT Smartcache III, IV - See NOTES for options device iir # Intel Integrated RAID device ips # IBM (Adaptec) ServeRAID device mly # Mylex AcceleRAID/eXtremeRAID device twa # 3ware 9000 series PATA/SATA RAID # RAID controllers device aac # Adaptec FSA RAID device aacp # SCSI passthrough for aac (requires CAM) device ida # Compaq Smart RAID device mlx # Mylex DAC960 family device pst # Promise Supertrak SX6000 device twe # 3ware ATA RAID # atkbdc0 controls both the keyboard and the PS/2 mouse device atkbdc # AT keyboard controller device atkbd # AT keyboard device psm # PS/2 mouse device vga # VGA video card driver device splash # Splash screen and screen saver support # syscons is the default console driver, resembling an SCO console device sc # Enable this for the pcvt (VT220 compatible) console driver #device vt #options XSERVER # support for X server on a vt console #options FAT_CURSOR # start with block cursor device agp # support several AGP chipsets # Floating point support - do not disable. device npx # Power management support (see NOTES for more options) #device apm # Add suspend/resume support for the i8254. device pmtimer # PCCARD (PCMCIA) support # PCMCIA and cardbus bridge support device cbb # cardbus (yenta) bridge device pccard # PC Card (16-bit) bus device cardbus # CardBus (32-bit) bus # Serial (COM) ports device sio # 8250, 16[45]50 based serial ports # Parallel port device ppc device ppbus # Parallel port bus (required) device lpt # Printer device plip # TCP/IP over parallel device ppi # Parallel port interface device #device vpo # Requires scbus and da # If you've got a "dumb" serial or parallel PCI card that is # supported by the puc(4) glue driver, uncomment the following # line to enable it (connects to the sio and/or ppc drivers): #device puc # PCI Ethernet NICs. device de # DEC/Intel DC21x4x (``Tulip'') device em # Intel PRO/1000 adapter Gigabit Ethernet Card device ixgb # Intel PRO/10GbE Ethernet Card device txp # 3Com 3cR990 (``Typhoon'') device vx # 3Com 3c590, 3c595 (``Vortex'') # PCI Ethernet NICs that use the common MII bus controller code. # NOTE: Be sure to keep the 'device miibus' line in order to use these NICs! device miibus # MII bus support device bfe # Broadcom BCM440x 10/100 Ethernet device bge # Broadcom BCM570xx Gigabit Ethernet device dc # DEC/Intel 21143 and various workalikes device fxp # Intel EtherExpress PRO/100B (82557, 82558) device pcn # AMD Am79C97x PCI 10/100 (precedence over 'lnc') device re # RealTek 8139C+/8169/8169S/8110S device rl # RealTek 8129/8139 device sf # Adaptec AIC-6915 (``Starfire'') device sis # Silicon Integrated Systems SiS 900/SiS 7016 device sk # SysKonnect SK-984x & SK-982x gigabit Ethernet device ste # Sundance ST201 (D-Link DFE-550TX) device ti # Alteon Networks Tigon I/II gigabit Ethernet device tl # Texas Instruments ThunderLAN device tx # SMC EtherPower II (83c170 ``EPIC'') device vr # VIA Rhine, Rhine II device wb # Winbond W89C840F device xl # 3Com 3c90x (``Boomerang'', ``Cyclone'') # ISA Ethernet NICs. pccard NICs included. device cs # Crystal Semiconductor CS89x0 NIC # 'device ed' requires 'device miibus' device ed # NE[12]000, SMC Ultra, 3c503, DS8390 cards device ex # Intel EtherExpress Pro/10 and Pro/10+ device ep # Etherlink III based cards device fe # Fujitsu MB8696x based cards device ie # EtherExpress 8/16, 3C507, StarLAN 10 etc. device lnc # NE2100, NE32-VL Lance Ethernet cards device sn # SMC's 9000 series of Ethernet chips device xe # Xircom pccard Ethernet # ISA devices that use the old ISA shims #device le # Wireless NIC cards device wlan # 802.11 support device an # Aironet 4500/4800 802.11 wireless NICs. device awi # BayStack 660 and others device wi # WaveLAN/Intersil/Symbol 802.11 wireless NICs. #device wl # Older non 802.11 Wavelan wireless NIC. # Pseudo devices. device loop # Network loopback device mem # Memory and kernel memory devices device io # I/O device device random # Entropy device device ether # Ethernet support device sl # Kernel SLIP device ppp # Kernel PPP device tun # Packet tunnel. device pty # Pseudo-ttys (telnet etc) device md # Memory "disks" device gif # IPv6 and IPv4 tunneling device faith # IPv6-to-IPv4 relaying (translation) # The `bpf' device enables the Berkeley Packet Filter. # Be aware of the administrative consequences of enabling this! device bpf # Berkeley packet filter # USB support device uhci # UHCI PCI->USB interface device ohci # OHCI PCI->USB interface device usb # USB Bus (required) #device udbp # USB Double Bulk Pipe devices device ugen # Generic device uhid # "Human Interface Devices" device ukbd # Keyboard device ulpt # Printer device umass # Disks/Mass storage - Requires scbus and da device ums # Mouse device urio # Diamond Rio 500 MP3 player device uscanner # Scanners # USB Ethernet, requires mii device aue # ADMtek USB Ethernet device axe # ASIX Electronics USB Ethernet device cue # CATC USB Ethernet device kue # Kawasaki LSI USB Ethernet device rue # RealTek RTL8150 USB Ethernet # FireWire support device firewire # FireWire bus code device sbp # SCSI over FireWire (Requires scbus and da) device fwe # Ethernet over FireWire (non-standard!) device "snd_sb16" device "snd_sb8" device snd_sbc device sound options INVARIANTS options INVARIANT_SUPPORT options IPSEC options IPSEC_ESP options KDB options KDB_UNATTENDED options WITNESS options DIAGNOSTIC options DUMMYNET options IPFIREWALL options IPFIREWALL_DEFAULT_TO_ACCEPT options SW_WATCHDOGReceived on Fri Aug 20 2004 - 19:16:19 UTC
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