From owner-freebsd-current@FreeBSD.ORG Thu Jan 23 16:14:59 2014 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 6F50EC2D for ; Thu, 23 Jan 2014 16:14:59 +0000 (UTC) Received: from mail-vc0-x22a.google.com (mail-vc0-x22a.google.com [IPv6:2607:f8b0:400c:c03::22a]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 2E92A1EF6 for ; Thu, 23 Jan 2014 16:14:59 +0000 (UTC) Received: by mail-vc0-f170.google.com with SMTP id hu8so1185286vcb.1 for ; Thu, 23 Jan 2014 08:14:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:date:message-id:subject:from:to:content-type; bh=F8IiIC0BGxLi9gGWOpOVH4beiyL1su9TxJHzgdGRGzo=; b=maMrRFuP06RMwX3K2m2uYT40oxlfqOoWqUjQevVnCSwDA3BQJUa+uJ2J3QFCeeRiTw SyYzsF0QqUnaa4NyIznJk8GobT8BDuxmHuOqFunyS2oiswetq5PvSKeI37ttqK1RJL4/ QDcZq/QTNNA0/KOa33hBHeGRn4XVSgTNs/GM2y+WrvYAQW7U6CCin1p0CVQ29d3DLnhz 9ES7ToB0HbUaUi6vWuJvToZplnqq11ixDSkNOjWV7C+/iWsq2nHToa5VvT4kMOOy4a/i m/nZ1u/rDjrmWiSqZDvN4FreXn9mfpDHURnKl9RJj4Ba/0mdF/DDl6P2+PW9G8ugoAV8 SitQ== MIME-Version: 1.0 X-Received: by 10.220.252.71 with SMTP id mv7mr88047vcb.68.1390493698308; Thu, 23 Jan 2014 08:14:58 -0800 (PST) Received: by 10.220.168.135 with HTTP; Thu, 23 Jan 2014 08:14:58 -0800 (PST) Date: Thu, 23 Jan 2014 11:14:58 -0500 Message-ID: Subject: lock order reversals w/ backtrace From: Thomas Hoffmann To: freebsd-current Content-Type: text/plain; charset=ISO-8859-1 X-Content-Filtered-By: Mailman/MimeDel 2.1.17 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.17 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: Thu, 23 Jan 2014 16:14:59 -0000 A few days ago I started running 11.0-CURRENT at r260971 for the first time. The last couple of times I shutdown my system I noticed 2 or 3 short "lock order reversal" messages with accompanying backtraces scroll by. Do these messages represent a problem that I should report or can I ignore them as debug in nature? If I should report them, how or where do these messages get logged? I can find no reference to them in syslog or anywhere else upon my subsequent reboot. I also had a couple of these messages pop up the other day while mounting/umounting USB thumb drives. I did not think anything of them at the time as the mounts/umounts completed successfully. Please advise. Thanks. -Tom