Date: Fri, 14 Jun 1996 13:31:55 -0700 From: "Jeffrey D. Wheelhouse" <jdw@wwwi.com> To: freebsd-stable@FreeBSD.org Subject: Re: Trap 12/supervisor read, page not present Message-ID: <199606142034.NAA03156@voltimand.csd.wwwi.com>
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At 11:48 PM 6/13/96 -0700, David Greenman wrote: > That's just about the most generic error that you can experiance. It's >caused by anything which references a bogus pointer in the kernel. You need to >provide MUCH more information about the crash. The complete trap information, >info about which routine the trap occurred in (via the kernel namelist) or >(better) a symbolic traceback if this is available. > Just saying that you had a "trap 12" is not useful other than to say that >you're having a problem of some kind. My mistake, I didn't have a copy of the dmesg on my hands at the time. Here we are: Fatal trap 12: page fault while in kernel mode fault virtual address = 0x0 fault code = supervisor read, page not present instruction pointer = 0x8:0xf019ab26 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, def32 1, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 22777 (sh) interrupt mask = net tty bio p\M^?\^Cge fault And here's the surrounding bits from the kernel: f019a818 T _pmap_is_referenced f019a9ac T _pmap_is_modified f019ab74 T _pmap_clear_modify f019acc4 T _pmap_clear_reference f019ae14 T _pmap_copy_on_write I will work on getting a symbolic trace, but I presently don't have that info. Hope this makes it more clear what is going on. Later, Jeff
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