From owner-freebsd-current@FreeBSD.ORG  Tue Jan  8 00:23:08 2013
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org
 [IPv6:2001:1900:2254:206a::19:1])
 by hub.freebsd.org (Postfix) with ESMTP id A2D4FDB4
 for <freebsd-current@freebsd.org>; Tue,  8 Jan 2013 00:23:08 +0000 (UTC)
 (envelope-from rysto32@gmail.com)
Received: from mail-oa0-f41.google.com (mail-oa0-f41.google.com
 [209.85.219.41]) by mx1.freebsd.org (Postfix) with ESMTP id 738DEF55
 for <freebsd-current@freebsd.org>; Tue,  8 Jan 2013 00:23:08 +0000 (UTC)
Received: by mail-oa0-f41.google.com with SMTP id k14so18616360oag.28
 for <freebsd-current@freebsd.org>; Mon, 07 Jan 2013 16:23:07 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:in-reply-to:references:date:message-id:subject:from:to
 :cc:content-type;
 bh=PcQWge02qfaT+toNfe1w2Ss4VqGVCXNdJPfjAceGahE=;
 b=sgisNitoBrNRHFFcvdRuzh8tYOxzv7WyOAgsLJdwwBGWVclbLqwF2MvC28XBdTjyXx
 EsGGp/eb9GQBRwXQvLlLH9OZqvuuTT28bUMt5PwTb68H9fFyUilJW3VFwElYJ2LOxXaC
 vmxydpPYKRIutSn0knvgHF1Tblg8rr4JXkL13txFX2noTaGqI6OvyfVy72zhRcbe0E26
 huN76pMM9F1m7agnDSSQvamo55b+MVpnLZVDnMz9P/fHfqXqW0uHLuDzOHfhcOHI3QcW
 dy1gdIe+0LYaGBODEDmTyqPspjPHPns+bbQHJjPUUfXv22fFo09/J5+YtlZKOietWatX
 TguA==
MIME-Version: 1.0
Received: by 10.60.171.175 with SMTP id av15mr34091285oec.75.1357604587477;
 Mon, 07 Jan 2013 16:23:07 -0800 (PST)
Received: by 10.76.128.68 with HTTP; Mon, 7 Jan 2013 16:23:07 -0800 (PST)
In-Reply-To: <CAFMmRNwv8pDsy0ZRLXzUft7A1OGxEt9DSmYN1Hun7FxrbHYvnA@mail.gmail.com>
References: <50EB602F.9050300@delphij.net> <20130108000233.GZ82219@kib.kiev.ua>
 <50EB63A9.50903@delphij.net>
 <CAFMmRNwv8pDsy0ZRLXzUft7A1OGxEt9DSmYN1Hun7FxrbHYvnA@mail.gmail.com>
Date: Mon, 7 Jan 2013 19:23:07 -0500
Message-ID: <CAFMmRNwq76vfTtBjEr_B7RVwHnHdY738oO+a=rTCRfr-fs5X+w@mail.gmail.com>
Subject: Re: sysctl -a causes kernel trap 12
From: Ryan Stone <rysto32@gmail.com>
To: Xin LI <d@delphij.net>
Content-Type: text/plain; charset=ISO-8859-1
X-Content-Filtered-By: Mailman/MimeDel 2.1.14
Cc: Konstantin Belousov <kostikbel@gmail.com>,
 FreeBSD Current <freebsd-current@freebsd.org>
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Tue, 08 Jan 2013 00:23:08 -0000

On Mon, Jan 7, 2013 at 7:21 PM, Ryan Stone <rysto32@gmail.com> wrote:

> Have you tried dropping into the debugger by setting
> debug.debugger_on_panic=1 instead of trying to generate a core?  You might
> have some success generating at least a backtrace.
>

Sigh, reading comprehension fail on my part.  Try generating a core, I
guess.

Another think that you could do would be to annotate the sysctl code path
to print the name of the sysctl that it is about to run to the console.