From owner-freebsd-arm@FreeBSD.ORG Wed Mar 11 04:09:41 2015 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 91A31C56 for ; Wed, 11 Mar 2015 04:09:41 +0000 (UTC) Received: from mail-oi0-x22d.google.com (mail-oi0-x22d.google.com [IPv6:2607:f8b0:4003:c06::22d]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 532F4824 for ; Wed, 11 Mar 2015 04:09:41 +0000 (UTC) Received: by oifu20 with SMTP id u20so5588901oif.12 for ; Tue, 10 Mar 2015 21:09:40 -0700 (PDT) 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=y9pGMg+bsccnP+87npkBPoCqtHIsfRRkONjil+R1rJA=; b=o72PyZbu/p0r3pMUo4LR0L3crayUWUm7WEGY0ldv1a7V5SKDPDsS+0CM4rKsJSmjer V1TglNxm37p95wBMdUE6PqiEyK00/pJ3m3+oo2G6QHkjcTpsMb28aoP6V8UM0rSPPOh/ uG/5vuJcwZdnQeIHlCeEaE0m4+5itqREEMnStsSER6VirH0+k9I2KC//WZUU3GUIUiA2 mvj//vqiLhCmrpl8ndI8qRvEdW4JR1kEdTfAOPWL1AJkaco/BWuT6hO+cUPZTIulXyf7 vLXtfRNxV7DDz348SkaEPwIPP3cZHN2bfx6mNq52KNzcO85jWnZvOl4Mqkb3TPsR9O+z vIsQ== MIME-Version: 1.0 X-Received: by 10.202.59.131 with SMTP id i125mr26889051oia.125.1426046980644; Tue, 10 Mar 2015 21:09:40 -0700 (PDT) Received: by 10.182.247.74 with HTTP; Tue, 10 Mar 2015 21:09:40 -0700 (PDT) In-Reply-To: References: Date: Tue, 10 Mar 2015 21:09:40 -0700 Message-ID: Subject: Re: BBB freebsd-current backtrace. why? From: jungle Boogie To: Jason Birch Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-arm@freebsd.org" X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Mar 2015 04:09:41 -0000 Hi Jason, On 10 March 2015 at 19:05, Jason Birch wrote: > > They're lock order reversals, as enabled by the WITNESS kernel option. You > probably don't need to worry, but it's helpful to check if they've been > reported and, if not, report them. > > You might be running into this one: > http://sources.zabbadoz.net/freebsd/lor/261.html > > Quick Googling turns up these resources: > > lock order reversals - what do they mean?: > https://lists.freebsd.org/pipermail/freebsd-current/2003-December/016617.html > Glossary of Kernel Options for Debugging: > https://www.freebsd.org/doc/en/books/developers-handbook/kerneldebug-options.html > FreeBSD LOR(lock order reversal)s seen and comments: > http://sources.zabbadoz.net/freebsd/lor.html Based on what Ian says, I hope these BT don't continue. Those threads are very likely before the BBB was made...much less had freeBSD running, so hopefully some progress has been made with freeBSD. Best, jungle -- ------- inum: 883510009027723 sip: jungleboogie@sip2sip.info xmpp: jungle-boogie@jit.si