From owner-freebsd-bugs@FreeBSD.ORG Wed Mar 11 17:20:07 2009 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 088B61065674 for ; Wed, 11 Mar 2009 17:20:07 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id D78988FC22 for ; Wed, 11 Mar 2009 17:20:06 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id n2BHK6Zd050007 for ; Wed, 11 Mar 2009 17:20:06 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id n2BHK66H050006; Wed, 11 Mar 2009 17:20:06 GMT (envelope-from gnats) Resent-Date: Wed, 11 Mar 2009 17:20:06 GMT Resent-Message-Id: <200903111720.n2BHK66H050006@freefall.freebsd.org> Resent-From: FreeBSD-gnats-submit@FreeBSD.org (GNATS Filer) Resent-To: freebsd-bugs@FreeBSD.org Resent-Reply-To: FreeBSD-gnats-submit@FreeBSD.org, Tim Kientzle Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 71490106564A for ; Wed, 11 Mar 2009 17:17:32 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (www.freebsd.org [IPv6:2001:4f8:fff6::21]) by mx1.freebsd.org (Postfix) with ESMTP id 602FC8FC1D for ; Wed, 11 Mar 2009 17:17:32 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id n2BHHWvT037975 for ; Wed, 11 Mar 2009 17:17:32 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id n2BHHWEZ037974; Wed, 11 Mar 2009 17:17:32 GMT (envelope-from nobody) Message-Id: <200903111717.n2BHHWEZ037974@www.freebsd.org> Date: Wed, 11 Mar 2009 17:17:32 GMT From: Tim Kientzle To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/132551: ZFS locks up on extattr_list_link syscall X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Mar 2009 17:20:08 -0000 >Number: 132551 >Category: kern >Synopsis: ZFS locks up on extattr_list_link syscall >Confidential: no >Severity: serious >Priority: medium >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Wed Mar 11 17:20:06 UTC 2009 >Closed-Date: >Last-Modified: >Originator: Tim Kientzle >Release: -CURRENT >Organization: >Environment: >Description: See bin/132452 for the initial reports of this. I added extended attribute support to tar recently and several people reported that making an extattr_list_link syscall on a ZFS volume hangs the CPU (100% system time) and results in an unkillable process. This has been reported on both amd64 and i386 architectures with recent -CURRENT. I don't have a machine with ZFS handy to try to reproduce this myself; I don't know if this affects 7-STABLE; I don't know if it also occurs for extattr_list_file or other extattr system calls. I'm eager to get this fixed so I can turn tar's extended attribute support back on. >How-To-Repeat: touch foo lsextattr -h user foo >Fix: >Release-Note: >Audit-Trail: >Unformatted: