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From: John Baldwin <jhb@freebsd.org>
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Date: Thu, 11 Jan 2007 12:57:54 -0500
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Cc: questions@freebsd.org, Ma <majie.mailinglist@gmail.com>
Subject: Re: Fatal trap 30: reserved (unknown) fault while in kernel mode
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On Sunday 17 December 2006 23:17, Ma wrote:
> I'm using the newest FreeBSD 6.2-PRERELEASE on our web server (compiled at
> last friday, 06-12-15). But it always crashes these days.
> The following information displayed on the screen with system crashed.
> ====================================================
> Fatal trap 30: reserved (unknown) fault while in kernel mode
> cpuid = 1; apic id = 01
> instruction pointer     = 0x20:0xc0b9bed1
> stack pointer           = 0x28:0xdc95fcd8
> frame pointer           = 0x28:0xdc95fcd8
> code segment            = base 0x0, limit oxfffff, type 0x1b
>                         = DPL 0, pres 1, def32 1, gran 1
> processor eflag         = interrupt enabled, IOPL = 0
> current process         = 10 (idle: cpu1)
> trap number             = 30
> panic: reserved (unknown) fault
> cpuid = 1
> uptime: 3m52s
> ahc0: WARNING no command for scb 79 (cmdcmplt)
> QOUTPOS = 235

You need to put 'ddb' in your kernel and run 'show lapic' and 'show apic' and 
provide a verbose dmesg.

-- 
John Baldwin