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Date:      Mon, 2 Feb 2009 08:49:05 -0500
From:      John Baldwin <jhb@freebsd.org>
To:        freebsd-amd64@freebsd.org
Cc:        Roar Pettersen <roar.pettersen@it.uib.no>, freebsd-gnats-submit@freebsd.org
Subject:   Re: amd64/131209: 7.1-STABLE amd64 crash
Message-ID:  <200902020849.06054.jhb@freebsd.org>
In-Reply-To: <200901311529.n0VFTj73014198@www.freebsd.org>
References:  <200901311529.n0VFTj73014198@www.freebsd.org>

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On Saturday 31 January 2009 10:29:45 am Roar Pettersen wrote:
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address   = 0x800000108
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x8:0xffffffff8037690c
> stack pointer           = 0x10:0xfffffffec329e5e0
> frame pointer           = 0x10:0x0
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        = interrupt enabled, resume, IOPL = 0
> current process         = 25972 (cron)
> trap number             = 12
> panic: page fault
> cpuid = 1
> Uptime: 6h33m10s
> Physical memory: 2039 MB
> Dumping 411 MB: 396 380 364 348 332 316 300 284 268 252 236 220 204 188 172 
156 140 124 108 92 76 60 44 28 12
> 
> Reading symbols from /boot/kernel/blank_saver.ko...Reading symbols 
from /boot/kernel/blank_saver.ko.symbols...done.
> done.
> Loaded symbols for /boot/kernel/blank_saver.ko
> #0  0xffffffff802fa8fa in doadump () 
at /usr/src/sys/kern/kern_shutdown.c:238
> 238             if (dumper.dumper == NULL) {

Can you provide the full backtrace?  This stack frame is well after the panic 
in the code that writes out the crash dump, so it is not very useful.

-- 
John Baldwin



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