From nobody@FreeBSD.org Wed Oct 12 04:09:03 2011 Return-Path: Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4211D106564A for ; Wed, 12 Oct 2011 04:09:03 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from red.freebsd.org (red.freebsd.org [IPv6:2001:4f8:fff6::22]) by mx1.freebsd.org (Postfix) with ESMTP id 318D58FC14 for ; Wed, 12 Oct 2011 04:09:03 +0000 (UTC) Received: from red.freebsd.org (localhost [127.0.0.1]) by red.freebsd.org (8.14.4/8.14.4) with ESMTP id p9C493pA057114 for ; Wed, 12 Oct 2011 04:09:03 GMT (envelope-from nobody@red.freebsd.org) Received: (from nobody@localhost) by red.freebsd.org (8.14.4/8.14.4/Submit) id p9C4929H057113; Wed, 12 Oct 2011 04:09:02 GMT (envelope-from nobody) Message-Id: <201110120409.p9C4929H057113@red.freebsd.org> Date: Wed, 12 Oct 2011 04:09:02 GMT From: Garrett Cooper To: freebsd-gnats-submit@FreeBSD.org Subject: Filesystem deadlocks when using multiple unionfs mounts on top of single filesystem X-Send-Pr-Version: www-3.1 X-GNATS-Notify: >Number: 161511 >Category: kern >Synopsis: [unionfs] Filesystem deadlocks when using multiple unionfs mounts on top of single filesystem >Confidential: no >Severity: serious >Priority: high >Responsible: freebsd-fs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Oct 12 04:10:09 UTC 2011 >Closed-Date: >Last-Modified: Fri Oct 14 21:21:07 UTC 2011 >Originator: Garrett Cooper >Release: 10-CURRENT >Organization: iXsystems, Inc. >Environment: FreeBSD streetfighter.ixsystems.com 10.0-CURRENT FreeBSD 10.0-CURRENT #4 r226140M: Tue Oct 11 17:03:51 PDT 2011 root@streetfighter.ixsystems.com:/usr/obj/usr/src/sys/STREETFIGHTER amd64 >Description: Mounting a filesystem twice with unionfs like so causes filesystem deadlocks when files are modified on top of unionfs: #!/bin/sh mkdir pristine cat > supfile <How-To-Repeat: See decomposed example above. >Fix: >Release-Note: >Audit-Trail: Responsible-Changed-From-To: freebsd-bugs->freebsd-fs Responsible-Changed-By: linimon Responsible-Changed-When: Fri Oct 14 21:20:54 UTC 2011 Responsible-Changed-Why: Over to maintainer(s). http://www.freebsd.org/cgi/query-pr.cgi?pr=161511 >Unformatted: