Hi all, I'm experiencing kernel panics on a webserver running freebsd 6.0. The panics are infrequent (about once a month) and do occur under mild load (even under only 0.4 load). Following the handbook's instructions I got the dump info and also made the dmesg available. I apologize in advance, I'm extremely new to this type of problem so if any information is missing please let me know. Thanks for any help or tips, they are much appreciated. Here is the dump info: # kgdb kernel.debug.0 vmcore.3 [GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"] GNU gdb 6.1.1 [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 "amd64-marcel-freebsd". Unread portion of the kernel message buffer: Sep 5 16:14:02 aeon sm-mta[37276]: k85L6atQ032754: SYSERR(root): deliver: mci=642018 rcode=0 errno=0 state=0 sigrelay.verizon.net. Sep 5 16:44:03 aeon sm-mta[38256]: k85L1oiE032593: SYSERR(root): deliver: mci=643018 rcode=0 errno=0 state=0 sig=relay.verizon.net. Sep 5 17:14:20 aeon sm-mta[39178]: k85JucY6030388: SYSERR(root): deliver: mci=643018 rcode=0 errno=0 state=0 sig=relay.verizon.net. Sep 5 17:45:31 aeon sm-mta[40231]: k85IWEZL027822: S #0 doadump () at pcpu.h:172 172 pcpu.h: No such file or directory. in pcpu.h (kgdb) backtrace #0 doadump () at pcpu.h:172 #1 0x0000000000000004 in ?? () #2 0xffffffff803b50c3 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:399 #3 0xffffffff803b56c6 in panic (fmt=0xffffff007b9ed720 "@??a") at /usr/src/sys/kern/kern_shutdown.c:555 #4 0xffffffff8058bfbf in trap_fatal (frame=0xffffff007b9ed720, eva=18446742975838606144) at /usr/src/sys/amd64/amd64/trap.c:655 #5 0xffffffff8058c462 in trap (frame {tf_rdi = -140737488355328, tf_rsi = -1099450764336, tf_rdx 6053253321325322206, tf_rcx = 34369499136, tf_r8 = 0, tf_r9 -1097427386368, tf_rax = 0, tf_rbx = -1384231984, tf_rbp 6053253321325322206, tf_r10 = 6385350, tf_r11 = 425690, tf_r12 -1099450764416, tf_r13 = -1097376303568, tf_r14 = 140737488355328, tf_r15 0, tf_trapno = 27, tf_addr = 0, tf_flags = -1396024512, tf_err = 0, tf_rip -2141685473, tf_cs = 8, tf_rflags = 66054, tf_rsp = -1310041440, tf_ss 16}) at /usr/src/sys/amd64/amd64/trap.c:467 #6 0xffffffff8057bb6b in calltrap () at /usr/src/sys/amd64/amd64/exception.S:168 #7 0xffffffff8058791f in pmap_remove_pages (pmap=0xffffff0003a0b380, sva=0, eva=140737488355328) at /usr/src/sys/amd64/amd64/pmap.c:2531 #8 0xffffffff80399561 in exit1 (td=0xffffff007b9ed720, rv=0) at vm_map.h:252 #9 0xffffffff8039987e in sys_exit (td=0xffff800000000000, uap=0xffffff0003a0b3d0) at /usr/src/sys/kern/kern_exit.c:97 #10 0xffffffff8058cdd1 in syscall (frame {tf_rdi = 0, tf_rsi = 34365342200, tf_rdx = 34369564640, tf_rcx = 0, tf_r8 = 0, tf_r9 = 0, tf_rax = 1, tf_rbx = 0, tf_rbp = 0, tf_r10 = 0, tf_r11 = 0, tf_r12 = 5628032, tf_r13 = 5533792, tf_r14 = 43, tf_r15 140737488349504, tf_trapno = 12, tf_addr = 34368757184, tf_flags = 12, tf_err = 2, tf_rip = 34369078716, tf_cs = 43, tf_rflags = 518, tf_rsp 140737488348776, tf_ss = 35}) at /usr/src/sys/amd64/amd64/trap.c:787 #11 0xffffffff8057bd08 in Xfast_syscall () at /usr/src/sys/amd64/amd64/exception.S:270 #12 0x00000008008e85bc in ?? () Previous frame inner to this frame (corrupt stack?) (kgdb) quit and dmesg: Copyright (c) 1992-2005 The FreeBSD Project. Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 The Regents of the University of California. All rights reserved. FreeBSD 6.0-RELEASE #0: Wed Nov 2 19:07:38 UTC 2005 root@rat.samsco.home:/usr/obj/usr/src/sys/GENERIC ACPI APIC Table: <A M I OEMAPIC > Timecounter "i8254" frequency 1193182 Hz quality 0 CPU: AMD Opteron(tm) Processor 244 (1792.82-MHz K8-class CPU) Origin = "AuthenticAMD" Id = 0xf51 Stepping = 1 Features=0x78bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2> AMD Features=0xe0500800<SYSCALL,NX,MMX+,LM,3DNow+,3DNow> real memory = 2147418112 (2047 MB) avail memory = 2063310848 (1967 MB) MADT: Forcing active-low polarity and level trigger for SCI ioapic0 <Version 1.1> irqs 0-23 on motherboard ioapic1 <Version 1.1> irqs 24-27 on motherboard ioapic2 <Version 1.1> irqs 28-31 on motherboard acpi0: <A M I OEMRSDT> on motherboard acpi0: Power Button (fixed) pci_link0: <ACPI PCI Link LNKA> irq 5 on acpi0 pci_link1: <ACPI PCI Link LNKB> irq 9 on acpi0 pci_link2: <ACPI PCI Link LNKC> irq 11 on acpi0 pci_link3: <ACPI PCI Link LNKD> irq 10 on acpi0 Timecounter "ACPI-fast" frequency 3579545 Hz quality 1000 acpi_timer0: <24-bit timer at 3.579545MHz> port 0x5008-0x500b on acpi0 cpu0: <ACPI CPU> on acpi0 acpi_throttle0: <ACPI CPU Throttling> on cpu0 pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0 pci0: <ACPI PCI bus> on pcib0 pcib1: <ACPI PCI-PCI bridge> at device 6.0 on pci0 pci3: <ACPI PCI bus> on pcib1 ohci0: <OHCI (generic) USB controller> mem 0xfeafc000-0xfeafcfff irq 19 at device 0.0 on pci3 ohci0: [GIANT-LOCKED] usb0: OHCI version 1.0, legacy support usb0: <OHCI (generic) USB controller> on ohci0 usb0: USB revision 1.0 uhub0: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub0: 3 ports with 3 removable, self powered ohci1: <OHCI (generic) USB controller> mem 0xfeafd000-0xfeafdfff irq 19 at device 0.1 on pci3 ohci1: [GIANT-LOCKED] usb1: OHCI version 1.0, legacy support usb1: <OHCI (generic) USB controller> on ohci1 usb1: USB revision 1.0 uhub1: AMD OHCI root hub, class 9/0, rev 1.00/1.00, addr 1 uhub1: 3 ports with 3 removable, self powered atapci0: <SiI 3114 SATA150 controller> port 0xbc00-0xbc07,0xb400-0xb403,0xb000-0xb007,0xac00-0xac03,0xa800-0xa80f mem 0xfeafec00-0xfeafefff irq 19 at device 5.0 on pci3 ata2: <ATA channel 0> on atapci0 ata3: <ATA channel 1> on atapci0 ata4: <ATA channel 2> on atapci0 ata5: <ATA channel 3> on atapci0 pci3: <display, VGA> at device 6.0 (no driver attached) fxp0: <Intel 82551 Pro/100 Ethernet> port 0xa400-0xa43f mem 0xfeafb000-0xfeafbfff,0xfeaa0000-0xfeabffff irq 18 at device 8.0 on pci3 miibus0: <MII bus> on fxp0 inphy0: <i82555 10/100 media interface> on miibus0 inphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto fxp0: Ethernet address: 00:e0:81:2a:15:a9 isab0: <PCI-ISA bridge> at device 7.0 on pci0 isa0: <ISA bus> on isab0 atapci1: <AMD 8111 UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xffa0-0xffaf at device 7.1 on pci0 ata0: <ATA channel 0> on atapci1 ata1: <ATA channel 1> on atapci1 pci0: <serial bus, SMBus> at device 7.2 (no driver attached) pci0: <bridge> at device 7.3 (no driver attached) pcib2: <ACPI PCI-PCI bridge> at device 10.0 on pci0 pci2: <ACPI PCI bus> on pcib2 bge0: <Broadcom BCM5704C Dual Gigabit Ethernet, ASIC rev. 0x2003> mem 0xfc8c0000-0xfc8cffff,0xfc8b0000-0xfc8bffff irq 24 at device 9.0 on pci2 miibus1: <MII bus> on bge0 brgphy0: <BCM5704 10/100/1000baseTX PHY> on miibus1 brgphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto bge0: Ethernet address: 00:e0:81:2a:50:3e bge1: <Broadcom BCM5704C Dual Gigabit Ethernet, ASIC rev. 0x2003> mem 0xfc8f0000-0xfc8fffff,0xfc8e0000-0xfc8effff irq 25 at device 9.1 on pci2 miibus2: <MII bus> on bge1 brgphy1: <BCM5704 10/100/1000baseTX PHY> on miibus2 brgphy1: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto bge1: Ethernet address: 00:e0:81:2a:50:3f pci0: <base peripheral, interrupt controller> at device 10.1 (no driver attached) pcib3: <ACPI PCI-PCI bridge> at device 11.0 on pci0 pci1: <ACPI PCI bus> on pcib3 pci0: <base peripheral, interrupt controller> at device 11.1 (no driver attached) acpi_button0: <Power Button> on acpi0 sio0: <16550A-compatible COM port> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0 sio0: type 16550A sio1: <16550A-compatible COM port> port 0x2f8-0x2ff irq 3 on acpi0 sio1: type 16550A fdc0: <floppy drive controller (FDE)> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi0 fdc0: [FAST] fd0: <1440-KB 3.5" drive> on fdc0 drive 0 orm0: <ISA Option ROMs> at iomem 0xc0000-0xc7fff,0xc8000-0xcc7ff on isa0 atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0 ppc0: cannot reserve I/O port range sc0: <System console> at flags 0x100 on isa0 sc0: VGA <16 virtual consoles, flags=0x300> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0 Timecounter "TSC" frequency 1792816307 Hz quality 800 Timecounters tick every 1.000 msec acd0: CDROM <QSI CD-ROM SCR-242/CXAC> at ata0-master UDMA33 ad10: 238475MB <Seagate ST3250823AS 3.03> at ata5-master SATA150