trap 12

[Robert Noland]

On Fri, 2009-07-03 at 10:06 +0100, Ian J Hart wrote:
> Is this likely to be hardware? Details will follow if not.
> 
> [copied from a screen dump]
> 
> Fatal trap 12: page fault while in kernel mode
> cpuid = 1; apic id = 01
> fault virtual address = 0x0
> fault code = supervisor write data, page not present
> instruction pointer = 0x8:0xffffffff807c6c12
> stack pointer = 0x10:0xffffffff510e7890
> frame pointer = 0x10:0xffffff00054a6c90
> 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 = 75372 (printf)
> trap number = 12
> panic: page fault
> cpuid = 1
> uptime: 8m2s
> Cannot dump. No dump device defined.
> 

I would doubt it.  Are you using drm, with the radeon driver?  There are
a few corner cases where this can happen.
http://people.freebsd.org/~rnoland/drm_radeon-copyin-fix-try2.patch
should help if this is the case.

robert.

-- 
Robert Noland <rnoland at FreeBSD.org>
FreeBSD
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