From owner-freebsd-current@freebsd.org Wed Feb 24 23:33:43 2016 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 DC967AB2FC3 for ; Wed, 24 Feb 2016 23:33:43 +0000 (UTC) (envelope-from kaduk@mit.edu) Received: from dmz-mailsec-scanner-7.mit.edu (dmz-mailsec-scanner-7.mit.edu [18.7.68.36]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 93E3DD79 for ; Wed, 24 Feb 2016 23:33:43 +0000 (UTC) (envelope-from kaduk@mit.edu) X-AuditID: 12074424-487ff70000003518-d5-56ce3ca2ca0b Received: from mailhub-auth-1.mit.edu ( [18.9.21.35]) (using TLS with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by (Symantec Messaging Gateway) with SMTP id A3.E7.13592.2AC3EC65; Wed, 24 Feb 2016 18:28:34 -0500 (EST) Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) by mailhub-auth-1.mit.edu (8.13.8/8.9.2) with ESMTP id u1ONSXDV011766; Wed, 24 Feb 2016 18:28:34 -0500 Received: from multics.mit.edu (system-low-sipb.mit.edu [18.187.2.37]) (authenticated bits=56) (User authenticated as kaduk@ATHENA.MIT.EDU) by outgoing.mit.edu (8.13.8/8.12.4) with ESMTP id u1ONSU24027108 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Wed, 24 Feb 2016 18:28:33 -0500 Received: (from kaduk@localhost) by multics.mit.edu (8.12.9.20060308) id u1ONSU35003866; Wed, 24 Feb 2016 18:28:30 -0500 (EST) Date: Wed, 24 Feb 2016 18:28:29 -0500 (EST) From: Benjamin Kaduk To: Eax Melanhovich cc: freebsd-current@freebsd.org Subject: Re: Lock order reversal in CURRENT In-Reply-To: <20160224153007.79bcf4ec@fujitsu> Message-ID: References: <20160224153007.79bcf4ec@fujitsu> User-Agent: Alpine 1.10 (GSO 962 2008-03-14) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrNIsWRmVeSWpSXmKPExsUixCmqrLvI5lyYwesn0hab/7FazHnzgcmB yWNBx21Wjxmf5rMEMEVx2aSk5mSWpRbp2yVwZSx43MdS8Ie1YvqLZ6wNjC9Zuhg5OSQETCTO brvO2MXIxSEk0MYksWhqNxOEs5FRYv2FRewQziEmiS9vtjGDtAgJNDBKfHmXAmKzCGhL7Jj4 nA3EZhNQkZj5ZiOYLSKgLnFl1zwwm1lAXuL/lctMILYwUP3tE1/BbE4BPYl9LT1gZ/AKOEps vnsHaD4H0HxdiVV7FEHCogI6Eqv3T4EqEZQ4OfMJC8RILYnl07exTGAUmIUkNQtJagEj0ypG 2ZTcKt3cxMyc4tRk3eLkxLy81CJdc73czBK91JTSTYygcGR3UdnB2HxI6RCjAAejEg8vw8+z YUKsiWXFlbmHGCU5mJREeQ/LnwsT4kvKT6nMSCzOiC8qzUktPsQowcGsJMLbbgWU401JrKxK LcqHSUlzsCiJ88bcPBomJJCeWJKanZpakFoEk5Xh4FCS4M2wBmoULEpNT61Iy8wpQUgzcXCC DOcBGp4AUsNbXJCYW5yZDpE/xajLseDH7bVMQix5+XmpUuK8OSBFAiBFGaV5cHPAaWQ3k+or RnGgt4R5GYFJRYgHmILgJr0CWsIEtOT2tlMgS0oSEVJSDYwlk4wCGI0+hDlz3Y/8pvlgp+78 dbpVCgtSq97M3WRR5nBsz43gFa+t/j/XWMt0jo115ceX/S932pc2m3d+23j8euP9tT62D8Rv tj5eMqeY68HhH4Vt20O49odvv9Vwff5/1w5XtYlJDev0rdTkH3Ck2an/XHdO8du0gA2KAZ4L T3pf0/9dM2e3EktxRqKhFnNRcSIAJHsHiP4CAAA= 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: Wed, 24 Feb 2016 23:33:44 -0000 On Wed, 24 Feb 2016, Eax Melanhovich wrote: > Hello. > > Yesterday I built a kernel and world using master branch (6a8922d3) of > FreeBSD GitHub repository (a mirror of SVN as I understand?). Today I > got a "lock order reversal" report: > > http://i.imgur.com/jDZ4A3O.png > > According to this FAQ it could be a sign of a deadlock: > > https://www.freebsd.org/doc/faq/troubleshoot.html#idp63366608 > > Do I have to report this issue anywhere except freebsd-current@ ? That particular one, though not in the table at http://sources.zabbadoz.net/freebsd/lor.html, seems similar enough to a ufs/devfs entry that shows up very often and is harmless, to make me think that just the mail you have sent is quite sufficient. Thanks, Ben Kaduk