Date: Thu, 30 Jun 2005 10:54:28 -0400 From: John Baldwin <jhb@FreeBSD.org> To: freebsd-smp@freebsd.org Cc: Hans van Leest <hvleest@signet.nl> Subject: Re: Boot error SMP Message-ID: <200506301054.28770.jhb@FreeBSD.org> In-Reply-To: <42C2F957.3010308@signet.nl> References: <42BECC86.3090404@signet.nl> <42C2F278.60408@signet.nl> <42C2F957.3010308@signet.nl>
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On Wednesday 29 June 2005 03:41 pm, Hans van Leest wrote:
> i think something strange is going on.
> I booted four times on the SMP kernel, and 4 times I had a different error
> I don't thing that's oke, when a kernel crashes.
> boot1: fatal process exeption; page fault; fault VA=0x0
> instruction pointer boot 2: 0xc07e8fd6
> instruction pointer boot 3: 0xc0687a9c
> instruction pointer boot 4: 0xc05ee318
>
> a gdb> list from the last one gave:
> No symbol table is loaded. Use the "file" command.
Are you sure the RAM and CPUs are ok? Have you tried running memtest on it?
> Hans van Leest wrote:
> > I proberbly didn't uderstand you correct. I did the following.
> > Booted from SMP_DEBUG kernel and it crashed. Secondly I booted from a
> > working kernel and
> > #cd /usr/obj/usr/src/sys/SMP_DEBUG
> > #gdb /usr/obj/usr/src/sys/SMP_DEBUG
> > gdb> list *0xc061a5e7
> >
> > It gave this back:
> >
> > (gdb) list *0xc061a5e7
> > 0xc061a5e7 is in free (uma_int.h:388).
> > 383 {
> > 384 vm_page_t p;
> > 385 uma_slab_t slab;
> > 386
> > 387 p = PHYS_TO_VM_PAGE(pmap_kextract(va));
> > 388 slab = (uma_slab_t )p->object;
> > 389
> > 390 if (p->flags & PG_SLAB)
> > 391 return (slab);
> > 392 else
> > (gdb)
> >
> > John Baldwin wrote:
> >> On Wednesday 29 June 2005 01:52 pm, Hans van Leest wrote:
> >>> I got a boot with the new debug kernel, only I got an new instruction
> >>> pointer. this one is:
> >>> 0x8:0xc061a5e7
> >>> When I type db> gdb, it replies that it can't find the backend
> >>> When I type tr after db> I get a lot of data so I want to use serial
> >>> console So I don't have to type it over. Only I get errors
> >>>
> >>> From the howto I did this
> >>>
> >>> cat /etc/ttys
> >>> --snip--
> >>> # The 'dialup' keyword identifies dialin lines to login, fingerd etc.
> >>> ttyd0 "/usr/libexec/getty std.9600" vt100 on secure
> >>> ttyd1 "/usr/libexec/getty std.9600" vt100 on secure
> >>> ttyd2 "/usr/libexec/getty std.9600" vt100 on secure
> >>> ttyd3 "/usr/libexec/getty std.9600" vt100 on secure
> >>
> >> These only let you login over the serial line, you don't need this
> >> for the kernel console.
> >>
> >>> bsd# cat /boot/loader.conf
> >>> set console="comconsole"
> >>
> >> This should be all you need.
> >>
> >>> I got error like this:
> >>> bsd init: can't exec getty 'none' for port /dev/console: No such file
> >>> or directory
> >>
> >> You must have something weird on the 'console' line in /etc/ttys.
> >> Normally the getty on that line should be 'off'. The way to grab the
> >> output is to use cut and paste or script(1) or some such on the
> >> machine that you are talking to the bsd box with, you don't capture
> >> the trace info on the bsd machine itself. For example, if you are
> >> using some Windows terminal app, you can cut and paste the trace info
> >> into notepad and then cut and paste that into an e-mail. If you are
> >> using another unix box without X11 as the client end of the console
> >> you could use script(1) to log the output to a file.
> >>
> >> That said, having the instruction pointer is good. To use that, boot
> >> the bsd box, find the kernel.debug from the kernel you built
> >> (probably /usr/obj/usr/src/sys/<KERNEL_NAME>/kernel.debug) and run
> >> gdb on it like so:
> >>
> >> # gdb /path/to/kernel.debug
> >>
> >> Then, at the gdb> prompt do a list:
> >>
> >> gdb> list *0xc061a5e7
> >
> > _______________________________________________
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> > http://lists.freebsd.org/mailman/listinfo/freebsd-smp
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>
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--
John Baldwin <jhb@FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/
"Power Users Use the Power to Serve" = http://www.FreeBSD.org
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