trap 12
John Baldwin
jhb at freebsd.org
Tue Jul 14 17:39:19 UTC 2009
On Tuesday 14 July 2009 9:51:01 am Ian J Hart wrote:
> Quoting John Baldwin <jhb at freebsd.org>:
>
> > On Tuesday 07 July 2009 5:51:03 am Ian J Hart wrote:
> >> Quoting Ian J Hart <ianjhart at ntlworld.com>:
> >>
> >>> Quoting Ian J Hart <ianjhart at ntlworld.com>:
> >>>
> >>>> 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.
> >>>>
> >>>>
> >>> Ran crashinfo, now have much more info than I need ;)
> >>>
> >>> Starting another portupgrade run now to see how reproducable this is.
> >>>
> >>> Later BIOS waiting in USB floppy.
> >>>
> >> [snip dmesg]
> >>
> >> It took 2 runs of portupgrade -af.Some corruption in the dbs may have
> >> to pkg_delete -a.
> >>
> >> FreeBSD * 7.2-RELEASE-p1 FreeBSD 7.2-RELEASE-p1 #0: Tue Jun 16
> >> 18:03:10 BST 2009 *@*:/usr/obj/usr/src/sys/GENERIC amd64
> >>
> >> panic: page fault
> >>
> >> GNU gdb 6.1.1 [FreeBSD]
> >> Copyright 2004 Free Software Foundation, Inc.
> >> GDB is free software, covered by the GNU General Public License, and you
are
> >> welcome to change it and/or distribute copies of it under certain
> > conditions.
> >> Type "show copying" to see the conditions.
> >> There is absolutely no warranty for GDB. Type "show warranty" for
details.
> >> This GDB was configured as "amd64-marcel-freebsd"...
> >>
> >> Unread portion of the kernel message buffer:
> >>
> >>
> >> Fatal trap 12: page fault while in kernel mode
> >> cpuid = 1; apic id = 01
> >> fault virtual address = 0xfffffffff5555570
> >> fault code = supervisor write data, page not present
> >> instruction pointer = 0x8:0xffffffff807c429b
> >> stack pointer = 0x10:0xffffffff511e4710
> >> frame pointer = 0x10:0x20
> >> 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 = 69996 (mkdir)
> >> trap number = 12
> >> panic: page fault
> >
> > This one does look like a hardware issue from the stack trace. It's hard
to
> > know if the first panic you saw was a hardware issue as well without the
> > stack trace information.
> >
> >> #7 0xffffffff807b706e in calltrap ()
> >> at /usr/src/sys/amd64/amd64/exception.S:209
> >> #8 0xffffffff807c429b in free_pv_entry (pmap=0xffffffff80b66c80,
> >> pv=Variable "pv" is not available.
> >> )
> >> at /usr/src/sys/amd64/amd64/pmap.c:1905
> >> #9 0xffffffff807c4403 in pmap_remove_entry (pmap=Variable "pmap" is
> >> not available.
> >> )
> >> at /usr/src/sys/amd64/amd64/pmap.c:2131
> >> #10 0xffffffff807c6447 in pmap_remove_pte (pmap=0xffffffff80b66c80,
> >> ptq=0xaaaaaaa8, va=18446744070506639360, ptepde=23601251,
> >> free=0xffffffff511e4790) at /usr/src/sys/amd64/amd64/pmap.c:2366
> >> #11 0xffffffff807cab87 in pmap_remove (pmap=0xffffffff80b66c80,
> >> sva=18446744070506639360, eva=18446744070506909696)
> >> at /usr/src/sys/amd64/amd64/pmap.c:2510
> >
> > --
> > John Baldwin
> >
>
> The remote backup continues to run so there was definitely some issue
> there. No more reboots, but it wasn't doing that regularly without
> some additional load.
>
> Hopefully I can swap parts around until I find the offending item.
>
> Thanks for your input.
I would try running memtest86 to check your RAM.
--
John Baldwin
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