taskeue timeout

Hi,

My FreeBSD 8.2 (VM in vmware esxi 5.1) reboot itself.
I don't understand why :
Code:
Dec 20 08:39:37 smtp11 syslogd: kernel boot file is /boot/kernel/kernel
Dec 20 08:39:37 smtp11 kernel: acdacd00::  WARNING - PREVENT_ALLOW taskqueue timeout - completing request directlyWARNING - PREVENT_ALLOW taskqueue timeout - completing request directly
Dec 20 08:39:37 smtp11 kernel: acd0: 
Dec 20 08:39:37 smtp11 kernel: acd0: WARNING - PREVENT_ALLOW freeing taskqueue zombie requestWARNING - PREVENT_ALLOW freeing taskqueue zombie request
Dec 20 08:39:37 smtp11 kernel: 
Dec 20 08:39:37 smtp11 last message repeated 2 times
Dec 20 08:39:37 smtp11 kernel: Fatal trap 12: page fault while in kernel mode
Dec 20 08:39:37 smtp11 kernel: cpuid = 1; apic id = 01
Dec 20 08:39:37 smtp11 kernel: fault virtual address	= 0x308
Dec 20 08:39:37 smtp11 kernel: fault code		= supervisor read data, page not present
Dec 20 08:39:37 smtp11 kernel: instruction pointer	= 0x20:0xffffffff805b345e
Dec 20 08:39:37 smtp11 kernel: stack pointer	        = 0x28:0xffffff800007fa10
Dec 20 08:39:37 smtp11 kernel: frame pointer	        = 0x28:0xffffff800007fa30
ENT_ALLOW taskqueue timeout - completing request directly
Dec 20 08:39:37 smtp11 kernel: acd0: 
Dec 20 08:39:37 smtp11 kernel: acd0: WARNING - PREVENT_ALLOW freeing taskqueue zombie requestWARNING - PREVENT_ALLOW freeing taskqueue zombie request
Dec 20 08:39:37 smtp11 kernel: 
Dec 20 08:39:37 smtp11 last message repeated 2 times
Dec 20 08:39:37 smtp11 kernel: Fatal trap 12: page fault while in kernel mode
Dec 20 08:39:37 smtp11 kernel: cpuid = 1; apic id = 01
Dec 20 08:39:37 smtp11 kernel: fault virtual address	= 0x308
Dec 20 08:39:37 smtp11 kernel: fault code		= supervisor read data, page not present
Dec 20 08:39:37 smtp11 kernel: instruction pointer	= 0x20:0xffffffff805b345e
Dec 20 08:39:37 smtp11 kernel: stack pointer	        = 0x28:0xffffff800007fa10
Dec 20 08:39:37 smtp11 kernel: frame pointer	        = 0x28:0xffffff800007fa30
Dec 20 08:39:37 smtp11 kernel: code segment		= base 0x0, limit 0xfffff, type 0x1b
Dec 20 08:39:37 smtp11 kernel: = DPL 0, pres 1, long 1, def32 0, gran 1
Dec 20 08:39:37 smtp11 kernel: processor eflags	= interrupt enabled, resume, IOPL = 0
Dec 20 08:39:37 smtp11 kernel: current process		= 12 (swi6: task queue)
Dec 20 08:39:37 smtp11 kernel: trap number		= 12
Dec 20 08:39:37 smtp11 kernel: panic: page fault
Dec 20 08:39:37 smtp11 kernel: cpuid = 1
Dec 20 08:39:37 smtp11 kernel: KDB: stack backtrace:
Dec 20 08:39:37 smtp11 kernel: #0 0xffffffff805f4e0e at kdb_backtrace+0x5e
Dec 20 08:39:37 smtp11 kernel: #1 0xffffffff805c2d07 at panic+0x187
Dec 20 08:39:37 smtp11 kernel: #2 0xffffffff808ac600 at trap_fatal+0x290
Dec 20 08:39:37 smtp11 kernel: #3 0xffffffff808ac9df at trap_pfault+0x28f
Dec 20 08:39:37 smtp11 kernel: #4 0xffffffff808acebf at trap+0x3df
Dec 20 08:39:37 smtp11 kernel: #5 0xffffffff80894fb4 at calltrap+0x8
Dec 20 08:39:37 smtp11 kernel: #6 0xffffffff805c1db0 at _sema_post+0x90
Dec 20 08:39:37 smtp11 kernel: #7 0xffffffff80276804 at ata_completed+0x474
Dec 20 08:39:37 smtp11 kernel: #8 0xffffffff805ffeb5 at taskqueue_run_locked+0x85
Dec 20 08:39:37 smtp11 kernel: #9 0xffffffff80600198 at taskqueue_run+0x38
Dec 20 08:39:37 smtp11 kernel: #10 0xffffffff8059b594 at intr_event_execute_handlers+0x104
Dec 20 08:39:37 smtp11 kernel: #11 0xffffffff8059cc45 at ithread_loop+0x95
Dec 20 08:39:37 smtp11 kernel: #12 0xffffffff805994f8 at fork_exit+0x118
Dec 20 08:39:37 smtp11 kernel: #13 0xffffffff8089547e at fork_trampoline+0xe
Dec 20 08:39:37 smtp11 kernel: Uptime: 18d11h6m1s
Dec 20 08:39:37 smtp11 kernel: Cannot dump. Device not defined or unavailable.
Dec 20 08:39:37 smtp11 kernel: Copyright (c) 1992-2011 The FreeBSD Project.
Dec 20 08:39:37 smtp11 kernel: Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
Dec 20 08:39:37 smtp11 kernel: The Regents of the University of California. All rights reserved.
Dec 20 08:39:37 smtp11 kernel: FreeBSD is a registered trademark of The FreeBSD Foundation.
Dec 20 08:39:37 smtp11 kernel: FreeBSD 8.2-RELEASE #0: Thu Feb 17 02:41:51 UTC 2011
Dec 20 08:39:37 smtp11 kernel: root@mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
Dec 20 08:39:37 smtp11 kernel: Timecounter "i8254" frequency 1193182 Hz quality 0
Dec 20 08:39:37 smtp11 kernel: CPU: Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz (2265.86-MHz K8-class CPU)
...

There is an error with the kernel ?
Why there is 0 seconde beetween the error and the boot start ??

thanks you for your help
 
You might want to check your memory. This is usually the result of memory going bad.

Also update to 8.3, FreeBSD 8.2 is end-of-life.
 
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