From owner-freebsd-current@freebsd.org Sun Aug 9 18:10:10 2015 Return-Path: Delivered-To: freebsd-current@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id D402099D811 for ; Sun, 9 Aug 2015 18:10:10 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from kib.kiev.ua (kib.kiev.ua [IPv6:2001:470:d5e7:1::1]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 637BAB33 for ; Sun, 9 Aug 2015 18:10:10 +0000 (UTC) (envelope-from kostikbel@gmail.com) Received: from tom.home (kostik@localhost [127.0.0.1]) by kib.kiev.ua (8.15.2/8.15.2) with ESMTPS id t79IA4dE014316 (version=TLSv1 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO); Sun, 9 Aug 2015 21:10:05 +0300 (EEST) (envelope-from kostikbel@gmail.com) DKIM-Filter: OpenDKIM Filter v2.10.3 kib.kiev.ua t79IA4dE014316 Received: (from kostik@localhost) by tom.home (8.15.2/8.15.2/Submit) id t79IA4NJ014315; Sun, 9 Aug 2015 21:10:04 +0300 (EEST) (envelope-from kostikbel@gmail.com) X-Authentication-Warning: tom.home: kostik set sender to kostikbel@gmail.com using -f Date: Sun, 9 Aug 2015 21:10:04 +0300 From: Konstantin Belousov To: Tim Kientzle Cc: FreeBSD Current Subject: Re: Consistent crash of BeagleBone kernel Message-ID: <20150809181004.GK2072@kib.kiev.ua> References: <20150809064704.GH2072@kib.kiev.ua> <350C3412-910F-4B08-A903-A51D18474DAF@kientzle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <350C3412-910F-4B08-A903-A51D18474DAF@kientzle.com> User-Agent: Mutt/1.5.23 (2014-03-12) X-Spam-Status: No, score=-2.0 required=5.0 tests=ALL_TRUSTED,BAYES_00, DKIM_ADSP_CUSTOM_MED,FREEMAIL_FROM,NML_ADSP_CUSTOM_MED autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on tom.home X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 09 Aug 2015 18:10:10 -0000 On Sun, Aug 09, 2015 at 10:53:20AM -0700, Tim Kientzle wrote: > > I suspect the LOR is new. > > It looks like the panic is occurring when WITNESS tries to print the backtrace for the LOR. I???m not familiar with that code; does it use the kernel linker? > It indeed locks the linker lock to resolve symbols. So it seems to be even more useful to make the linker lock recursive locally, then you should be able to see the backtrace for LOR.