Fresh 7.0 Install: Fatal Trap 12 panic when put under load

[Kevin Oberman]

> From: "John Sullivan" <john at basicnets.co.uk>
> Date: Tue, 15 Jul 2008 10:58:19 +0100
> Sender: owner-freebsd-stable at freebsd.org
> 
> I am experiencing 'random' reboots interspersed with panics whenever I put a newly installed system under load (make index in
> /usr/ports is enough).  A sample panic is at the end of this email.
>  
> I have updated to 7.0-RELEASE-p2 using the GENERIC amd64 kernel and it is still the same.  The system is a Gigabyte GA-M56S-S3
> motherboard with 4GB of RAM, an Athlon X2 6400+ and 3 x Maxtor SATA 750GB HDD's (only the first is currently in use).  The first
> disk is all allocated to FreeBSD using UFS.  There is also a Linksys 802.11a/b/g card installed.  I have flashed the BIOS to the
> latest revision (F4e).  The onboard RAID is disabled.
>  
> At the moment there is no exotic software installed.
>  
> Although I have been using FreeBSD for a number of years this is the first time I have experienced regular panics and am at a
> complete loss trying to work out what is wrong.  I would be grateful for any advice anyone is willing to give to help me
> troubleshoot this issue.
>  
> Thanks in advance
>  
> John
>  
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic id = 00
> fault virtual address = 0x800000b0
> fault code - supervisor write data, page not present
> instruction pointer = 0x8:0xffffffff804db18c
> stack pointer = 0x10:ffffffffb1e92450
> frame pointer = 0x10:ffffffec
> code segment = base 0x0, limit 0xfffff, type 0x16, DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags = interupt enabled, resume, IOPL = 0
> current processkernel trap 12 with interrupts disabled
>  
> #nm -n /boot/kernel/kernel | grep ffffffff804db
> ffffffff804dbac0 t flushbufqueues

Could be memory, but I'd also suggest looking at temperatures. I've had
overheating systems produce lots of such errors.
-- 
R. Kevin Oberman, Network Engineer
Energy Sciences Network (ESnet)
Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab)
E-mail: oberman at es.net			Phone: +1 510 486-8634
Key fingerprint:059B 2DDF 031C 9BA3 14A4  EADA 927D EBB3 987B 3751
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