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Date:      Sat, 7 Jun 2008 23:42:38 -0700
From:      "Jack Vogel" <jfvogel@gmail.com>
To:        "Daniel Ponticello" <daniel@skytek.it>
Cc:        freebsd-net@freebsd.org, freebsd-stable@freebsd.org
Subject:   Re: kernel panic on em0/taskq
Message-ID:  <2a41acea0806072342q518ac2afo663c91e730c16db@mail.gmail.com>
In-Reply-To: <484AFEF1.4040500@skytek.it>
References:  <484AFEF1.4040500@skytek.it>

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On Sat, Jun 7, 2008 at 2:34 PM, Daniel Ponticello <daniel@skytek.it> wrote:
> Hello,
> i'm experiencing periodic kernel panics on a server with  FreeBSD 7.0-STABLE
> #0: Tue May 20 19:09:43 CEST 2008.
> My big problem is that the system is not performing memory dumping and/or
> automatic reoboot,
> it just stays there.
>
> Here' console output:
>
> em0: watchdog timeout -- resetting
> kernel trap 12 with interrupts disabled
>
> Fatal trap 12: page fault while in kernel mode
> cpuid = 0; apic_id = 00
> fault virtual address   = 0x14
> fault code                 = supervisor read, page not present
> intruction pointerr     = 0x20:0xc056e2ce
> stack pointer             = 0x28:0xe537fc08
> frame pointer            = 0x28:0xe537fc28
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                               = DPL 0, pres 1, def32 1, gran 1
> processor eflags         = resume, IOPL = 0
> current process          = 29 (em0 taskq)
> trap number               = 12
> panic: page fault
> cpuid = 0
>
>
> It just stays there, unresponsive (no automatic reboot).
>
>
>
> Any  ideas?

There was a problem in the watchdog path, I don't recall if
it was checked in to STABLE, I will check after the weekend.

But, there is also the question of why you are in the watchdog
path in the first place.

Jack



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