kernel panic on em0/taskq

Daniel Ponticello daniel at
Sat Jun 7 21:34:36 UTC 2008

i'm experiencing periodic kernel panics on a server with  FreeBSD 
7.0-STABLE #0: Tue May 20 19:09:43 CEST 2008.
My big problem is that the system is not performing memory dumping 
and/or automatic reoboot,
it just stays there.

Here' console output:

em0: watchdog timeout -- resetting
kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic_id = 00
fault virtual address   = 0x14
fault code                 = supervisor read, page not present
intruction pointerr     = 0x20:0xc056e2ce
stack pointer             = 0x28:0xe537fc08
frame pointer            = 0x28:0xe537fc28
code segment            = base 0x0, limit 0xfffff, type 0x1b
                                = DPL 0, pres 1, def32 1, gran 1
processor eflags         = resume, IOPL = 0
current process          = 29 (em0 taskq)
trap number               = 12
panic: page fault
cpuid = 0

It just stays there, unresponsive (no automatic reboot).

Any  ideas?




Cordiali Saluti,
Daniel Ponticello, VP of Engineering

Network Coordination Centre of Skytek

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