From owner-svn-src-stable@FreeBSD.ORG Thu Sep 19 00:18:26 2013 Return-Path: Delivered-To: svn-src-stable@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 ESMTP id 43CC5ACE; Thu, 19 Sep 2013 00:18:26 +0000 (UTC) (envelope-from mckusick@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 310E82ECE; Thu, 19 Sep 2013 00:18:26 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.7/8.14.7) with ESMTP id r8J0IQw3059094; Thu, 19 Sep 2013 00:18:26 GMT (envelope-from mckusick@svn.freebsd.org) Received: (from mckusick@localhost) by svn.freebsd.org (8.14.7/8.14.5/Submit) id r8J0IQeR059092; Thu, 19 Sep 2013 00:18:26 GMT (envelope-from mckusick@svn.freebsd.org) Message-Id: <201309190018.r8J0IQeR059092@svn.freebsd.org> From: Kirk McKusick Date: Thu, 19 Sep 2013 00:18:26 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-8@freebsd.org Subject: svn commit: r255681 - stable/8/sys/ufs/ufs X-SVN-Group: stable-8 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for all the -stable branches of the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 19 Sep 2013 00:18:26 -0000 Author: mckusick Date: Thu Sep 19 00:18:25 2013 New Revision: 255681 URL: http://svnweb.freebsd.org/changeset/base/255681 Log: MFC of 253998: This bug fix is in a code path in rename taken when there is a collision between a rename and an open system call for the same target file. Here, rename releases its vnode references, waits for the open to finish, and then restarts by reacquiring its needed vnode locks. In this case, rename was unlocking but failing to release its reference to one of its held vnodes. The effect was that even after all the actual references to the vnode had gone, the vnode still showed active references. For files that had been removed, their space was not reclaimed until the filesystem was forcibly unmounted. This bug manifested itself in the Postgres server which would leak/lose hundreds of files per day amounting to many gigabytes of disk space. This bug required shutting down Postgres, forcibly unmounting its filesystem, remounting its filesystem and restarting Postgres every few days to recover the lost space. Reported by: Dan Thomas and Palle Girgensohn Bug-fix by: kib Tested by: Dan Thomas and Palle Girgensohn Modified: stable/8/sys/ufs/ufs/ufs_vnops.c Directory Properties: stable/8/sys/ (props changed) stable/8/sys/ufs/ (props changed) Modified: stable/8/sys/ufs/ufs/ufs_vnops.c ============================================================================== --- stable/8/sys/ufs/ufs/ufs_vnops.c Wed Sep 18 23:02:38 2013 (r255680) +++ stable/8/sys/ufs/ufs/ufs_vnops.c Thu Sep 19 00:18:25 2013 (r255681) @@ -1242,7 +1242,7 @@ relock: error = VFS_VGET(mp, ino, LK_EXCLUSIVE, &nvp); if (error != 0) goto releout; - VOP_UNLOCK(nvp, 0); + vput(nvp); atomic_add_int(&rename_restarts, 1); goto relock; }