From owner-freebsd-current@freebsd.org Wed Dec 9 18:43:33 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 F0D3C9D4835 for ; Wed, 9 Dec 2015 18:43:33 +0000 (UTC) (envelope-from pete@nomadlogic.org) Received: from mail.nomadlogic.org (mail.nomadlogic.org [IPv6:2607:f2f8:a098::4]) (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 E045D1B68 for ; Wed, 9 Dec 2015 18:43:33 +0000 (UTC) (envelope-from pete@nomadlogic.org) Received: from mail.nomadlogic.org (localhost [127.0.0.1]) (using TLSv1 with cipher ADH-CAMELLIA256-SHA (256/256 bits)) (No client certificate requested) by mail.nomadlogic.org (Postfix) with ESMTPS id 838F1125EE1 for ; Wed, 9 Dec 2015 10:43:32 -0800 (PST) Received: from pop.rubicorp.com (unknown [72.34.113.100]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.nomadlogic.org (Postfix) with ESMTPSA id 7994F125EBA for ; Wed, 9 Dec 2015 10:43:32 -0800 (PST) Subject: [RESOLVED] LOR On AMD64 hosted by KVM hypervisor To: freebsd-current@freebsd.org References: <56673129.4090207@nomadlogic.org> From: Pete Wright Message-ID: <56687653.1090709@nomadlogic.org> Date: Wed, 9 Dec 2015 10:43:31 -0800 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.4.0 MIME-Version: 1.0 In-Reply-To: <56673129.4090207@nomadlogic.org> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit 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, 09 Dec 2015 18:43:34 -0000 Closing the loop on this for the archives - I am no longer seeing this LOR as of r291998. -pete On 12/08/15 11:36, Pete Wright wrote: > Hey All, > I am seeing a repeated LOR on r291495 that is pretty reproducible. This > happens right after the system boots: > > lock order reversal: > 1st 0xfffffe03e37fa920 bufwait (bufwait) @ /usr/src/sys/kern/vfs_bio.c:3476 > 2nd 0xfffff80024c72200 dirhash (dirhash) @ > /usr/src/sys/ufs/ufs/ufs_dirhash.c:281 > stack backtrace: > #0 0xffffffff80a7b2e0 at witness_debugger+0x70 > #1 0xffffffff80a7b1e1 at witness_checkorder+0xe71 > #2 0xffffffff80a28ab2 at _sx_xlock+0x72 > #3 0xffffffff80cc0a5d at ufsdirhash_add+0x3d > #4 0xffffffff80cc390f at ufs_direnter+0x62f > #5 0xffffffff80ccccd3 at ufs_makeinode+0x5f3 > #6 0xffffffff80cc881d at ufs_create+0x2d > #7 0xffffffff80fb2ed1 at VOP_CREATE_APV+0xf1 > #8 0xffffffff80ae3568 at vn_open_cred+0x2f8 > #9 0xffffffff80adc8ec at kern_openat+0x25c > #10 0xffffffff80e6a4fe at amd64_syscall+0x2de > #11 0xffffffff80e4972b at Xfast_syscall+0xfb > > Here is the system info: > % uname -ar > FreeBSD bsd-current.trp-srd.com 11.0-CURRENT FreeBSD 11.0-CURRENT #0 > r291495: Mon Nov 30 23:14:34 UTC 2015 > root@releng2.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC amd64 > > The server itself is a VM running under the KVM hypervisor. I am > currently rebuilding world+kernel now. The base OS image is from the > latest 11-CURRENT snapshot, and I have been able to reproduce this on > several hypervisors. > > Has anyone else seen this? > > Cheers, > -pete > > > > -- Pete Wright pete@nomadlogic.org twitter => @nomadlogicLA