Date: Mon, 29 Oct 2007 20:52:53 -0700 From: David Wolfskill <david@catwhisker.org> To: Tai-hwa Liang <avatar@mmlab.cse.yzu.edu.tw> Cc: current@freebsd.org Subject: Re: Detach of an0 induced kernel panic in 7.0-PRE Message-ID: <20071030035253.GF78150@bunrab.catwhisker.org> In-Reply-To: <0710300936223.30335@www.mmlab.cse.yzu.edu.tw> References: <20071029190208.GD78150@bunrab.catwhisker.org> <0710300936223.30335@www.mmlab.cse.yzu.edu.tw>
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On Tue, Oct 30, 2007 at 09:38:47AM +0800, Tai-hwa Liang wrote:
> ...
> >Unread portion of the kernel message buffer:
> >an0: RID access failed
> >an0: detached
> >
> >
> >Fatal trap 12: page fault while in kernel mode
> ...
> >#0 doadump () at pcpu.h:195
> >195 __asm __volatile("movl %%fs:0,%0" : "=r" (td));
> >(kgdb) bt
> >#0 doadump () at pcpu.h:195
> >#1 0xc073b637 in boot (howto=260) at /usr/src/sys/kern/kern_shutdown.c:409
> >#2 0xc073b8f9 in panic (fmt=Variable "fmt" is not available.
> >) at /usr/src/sys/kern/kern_shutdown.c:563
> >#3 0xc0a005dc in trap_fatal (frame=0xe2987c1c, eva=3358077304)
> > at /usr/src/sys/i386/i386/trap.c:872
> >#4 0xc0a00860 in trap_pfault (frame=0xe2987c1c, usermode=0,
> >eva=3358077304)
> > at /usr/src/sys/i386/i386/trap.c:785
> >#5 0xc0a011d5 in trap (frame=0xe2987c1c) at
> >/usr/src/sys/i386/i386/trap.c:463
> >#6 0xc09e71eb in calltrap () at /usr/src/sys/i386/i386/exception.s:139
> >#7 0xc04daaf7 in an_stats_update (xsc=0xc8282000) at atomic.h:149
> >#8 0xc074d7ea in softclock (dummy=0x0) at
> >/usr/src/sys/kern/kern_timeout.c:274
> >#9 0xc071ef0b in ithread_loop (arg=0xc3f0d2f0)
> > at /usr/src/sys/kern/kern_intr.c:1036
> >#10 0xc071bc19 in fork_exit (callout=0xc071ed60 <ithread_loop>,
> > arg=0xc3f0d2f0, frame=0xe2987d38) at /usr/src/sys/kern/kern_fork.c:796
> >#11 0xc09e7260 in fork_trampoline () at
> >/usr/src/sys/i386/i386/exception.s:205
> >(kgdb)
> ...
> Does the attached patch help?
Aye, it does appear to do so.
I tested at home, where the an0 NIC is actually useful. But I managed
to detach the card before the script reported successful association;
the machine kept running (and the script fell back to trying the wi0
NIC, since the an0 NIC was no longer there).
I'd call that a definite improvement -- and fast response! Thanks again!
Peace,
david
--
David H. Wolfskill david@catwhisker.org
Proprietary data formats obfuscate, rather than disseminate, information.
See http://www.catwhisker.org/~david/publickey.gpg for my public key.
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