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

John Sullivan john at basicnets.co.uk
Tue Jul 15 10:15:03 UTC 2008


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


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