Date: Tue, 23 Nov 2004 09:49:33 +1030 From: "Wilkinson, Alex" <alex.wilkinson@dsto.defence.gov.au> To: current@freebsd.org Subject: Re: crash in natd again Message-ID: <20041122231933.GC14425@squash.dsto.defence.gov.au> In-Reply-To: <1101162352.4774.7.camel@server.mcneil.com> References: <1101162352.4774.7.camel@server.mcneil.com>
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I've always used something like:
dumpdev="/dev/ad0s3b"
i.e. s3b being swap.
-aW
0n Tue, Nov 23, 2004 at 08:55:52AM +1030, Sean McNeil wrote:
> This is on an amd64 machine. I though that setting
>
> dumpdev="AUTO"
>
> in /etc/rc.conf was sufficient to get a crash dump, but it didn't work.
> I'm adding
>
> dumpon_enable="YES"
> savecore_enable="YES"
>
> now. Please let me know if there is anything else I need to set.
>
> The information I can get is:
>
> Nov 22 13:47:27 server kernel: Fatal trap 12: page fault while in kernel
> mode
> Nov 22 13:47:27 server kernel: fault virtual address = 0x18
> Nov 22 13:47:27 server kernel: fault code = supervisor
> read, page
> not present
> Nov 22 13:47:27 server kernel: instruction pointer =
> 0x8:0xffffffff80357980Nov 22 13:47:27 server kernel: stack pointer
> = 0x10:0xffffffffb41c5620
> Nov 22 13:47:27 server kernel: frame pointer =
> 0x10:0xffffffffb41c5680
> Nov 22 13:47:27 server kernel: code segment = base 0x0,
> limit 0xfffff, type 0x1b
> Nov 22 13:47:27 server kernel: = DPL 0, pres 1, long 1, def32 0, gran 1
> Nov 22 13:47:27 server kernel: processor eflags = interrupt enabled,
> resume, IOPL = 0
> Nov 22 13:47:27 server kernel: current process = 215 (natd)
> Nov 22 13:47:27 server kernel: trap number = 12
> Nov 22 13:47:27 server kernel: panic: page fault
> Nov 22 13:47:27 server kernel: KDB: enter: panic
>
> uname is
>
> FreeBSD server.mcneil.com 6.0-CURRENT FreeBSD 6.0-CURRENT #5: Sun Nov 21
> 00:33:27 PST 2004 root@server.mcneil.com:/usr/obj/usr/src/sys/AMD64
> amd64
>
> (gdb) l *0xffffffff80357980
> 0xffffffff80357980 is in m_copym (/usr/src/sys/kern/uipc_mbuf.c:373).
> 368 MBUF_CHECKSLEEP(wait);
> 369 if (off == 0 && m->m_flags & M_PKTHDR)
> 370 copyhdr = 1;
> 371 while (off > 0) {
> 372 KASSERT(m != NULL, ("m_copym, offset > size of
> mbuf chain"));
> 373 if (off < m->m_len)
> 374 break;
> 375 off -= m->m_len;
> 376 m = m->m_next;
> 377 }
>
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