Date: Wed, 31 Dec 2003 02:41:01 -0800 From: Dan Hulme <d@diefree.com> To: John Baldwin <jhb@FreeBSD.org> Cc: freebsd-current@freebsd.org Subject: Re: ACPI causes page fault/panic upon reboot Message-ID: <3FF2A7BD.5000901@diefree.com> In-Reply-To: <XFMail.20031229170423.jhb@FreeBSD.org> References: <XFMail.20031229170423.jhb@FreeBSD.org>
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John Baldwin wrote:
>Can you build a debug kernel, reproduce the panic, and then do a list
>from gdb on your kernel.debug of the instruction pointer? For example,
>from the above you do:
>
>gdb -k kernel.debug
>l *0xc05fd8c5
>
>
First I should say that turning off acpi seemed to fix the problem.
However, the problem appears to be in dc0.
Ok, rebuilt my kernel with
makeoptions DEBUG=-g
options DDB
Rebooted, did a trace when it went to the db prompt.:
***********************
Shutting down ACPI
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0x18
fault code = supervisor write, page not present
instruction pointer = 0x8:0xc0603bc5
stack pointer = 0x10:0xd032cc90
frame pointer = 0x10:0xd032ccc0
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 = 19 (irq9: rl0 dc0 acpi0)
kernel: type 12 trap, code=0
Stopped at dc_rxeof+0x1b5: movl %edx,0x18(%eax)
db>trace
dc_rxeof(c33bb000,0,c0700bbe,c43,c33bb000) at dc_rxeof+0x1b5
dc_intr(c33bb000,0,c06f4d21,21f,c333d388) at dc_intr+0x100
ithread_loop(c1843980,d032cd48,c06f4be6,311,0) at ithread_loop+0x162
fork_trampoline() at fork_trampoline+0x8
--- trap 0x1, eip = 0, esp = 0xd032cd7c, ebp = 0 ---
*****************
Did a gdb -k kernel.debug, and listed the code:
*****************
(kgdb) l *0xc0603bc5
0xc0603bc5 is in dc_rxeof (../../../pci/if_dc.c:2804).
2799 * If we are on an architecture with alignment
problems, or
2800 * if the allocation fails, then use m_devget
and leave the
2801 * existing buffer in the receive ring.
2802 */
2803 if (dc_quick && dc_newbuf(sc, i, 1) == 0) {
2804 m->m_pkthdr.rcvif = ifp;
2805 m->m_pkthdr.len = m->m_len = total_len;
2806 DC_INC(i, DC_RX_LIST_CNT);
2807 } else
2808 #endif
*****************
I hope this helps.
-Dan
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