From owner-freebsd-current@FreeBSD.ORG Wed Feb 18 17:53:48 2015 Return-Path: Delivered-To: freebsd-current@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 CC51FFF6 for ; Wed, 18 Feb 2015 17:53:48 +0000 (UTC) Received: from mail-la0-f51.google.com (mail-la0-f51.google.com [209.85.215.51]) (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 5B236D57 for ; Wed, 18 Feb 2015 17:53:47 +0000 (UTC) Received: by labhz20 with SMTP id hz20so2806613lab.0 for ; Wed, 18 Feb 2015 09:53:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:from:date:message-id:subject:to:content-type; bh=fuFrcl4Xrk2qosEVSUioVwgkb8igT7MMjk5U8HBOeSE=; b=nGB2sGCoPjoMiPwCqh7jt3m6m1PyOUw1eEZJxOrYiQQ06AslHjedS1HrD3qcH56GDW lCHVvx3h1T5fi9kcnsOw1F1O/aRhJRNvQVaMTk7akZbmH1jd0hMV56weURjp1oL/TAxS r8vNuFKjyGcABdRbv4d+GofGzCOmhQJa0rF1uiQwz2Iu/W61SdsGj0AZOqfWmVZyS3Hd c3LkGuD0biFUBiqL6g765B9KBgvDyz8brLdqcNBXlLcDf6uB5i0Jpc6JM+9KlEhwB8j8 qOPVTaNwNzNK4tchcFZrgWnOf/IQfyoDrtCwvn67xS+fvE1FaA0kO47hbT6XR5iBxkdd 7sDQ== X-Received: by 10.112.17.39 with SMTP id l7mr482174lbd.114.1424282025392; Wed, 18 Feb 2015 09:53:45 -0800 (PST) MIME-Version: 1.0 Received: by 10.152.90.7 with HTTP; Wed, 18 Feb 2015 09:53:25 -0800 (PST) From: Damjan Jovanovic Date: Wed, 18 Feb 2015 19:53:25 +0200 Message-ID: Subject: ufs/devfs "lock order reversal" on poweroff To: freebsd-current@freebsd.org Content-Type: text/plain; charset=UTF-8 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 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, 18 Feb 2015 17:53:48 -0000 Hi On r278909 (and probably earlier) I get the following when I run "poweroff" (retyped from a video of it I had to record, since it disappears very quickly): Syncing disks, vnodes remaining...4 1 0 0 done All buffers synced. lock order reversal: 1st 0xfffff80014d4d060 ufs (ufs) 0 /usr/src/sys/kern/vfs_mount.c:1229 2nd 0xfffff00014a695f0 devfs (devfs) 0 /usr/src/sys/kern/vfs_subr.c:2176 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame ... witness_checkorder() at witness_checkorder+... __lockmgr_args() at __lockmgr_args+... vop_stdlock() at vop_stdlock+0x3c/frame .. VOP_LOOCK1_AVP() _vm_lock() vget() devfs_allocv() devfs_root() dounmount() vfs_unmountall() kern_reboot() sys_reboot() amd64_syscall() Xfast_syscall() --- syscall (55, FreeBSD ELF64, sys_reboot), ript = 0x40fd1c, rsp = ..., rbp= ... Uptime: ... Thank you Damjan