From owner-freebsd-bugs@FreeBSD.ORG Fri Feb 26 21:40:02 2010 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 991EB1065674 for ; Fri, 26 Feb 2010 21:40:02 +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 5B7F18FC15 for ; Fri, 26 Feb 2010 21:40:02 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.3/8.14.3) with ESMTP id o1QLe2Gv050752 for ; Fri, 26 Feb 2010 21:40:02 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.3/8.14.3/Submit) id o1QLe244050751; Fri, 26 Feb 2010 21:40:02 GMT (envelope-from gnats) Resent-Date: Fri, 26 Feb 2010 21:40:02 GMT Resent-Message-Id: <201002262140.o1QLe244050751@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, Gerrit Kühn Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4399D1065679 for ; Fri, 26 Feb 2010 21:34:20 +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 329768FC1B for ; Fri, 26 Feb 2010 21:34:20 +0000 (UTC) Received: from www.freebsd.org (localhost [127.0.0.1]) by www.freebsd.org (8.14.3/8.14.3) with ESMTP id o1QLYJXn004549 for ; Fri, 26 Feb 2010 21:34:19 GMT (envelope-from nobody@www.freebsd.org) Received: (from nobody@localhost) by www.freebsd.org (8.14.3/8.14.3/Submit) id o1QLYJtT004548; Fri, 26 Feb 2010 21:34:19 GMT (envelope-from nobody) Message-Id: <201002262134.o1QLYJtT004548@www.freebsd.org> Date: Fri, 26 Feb 2010 21:34:19 GMT From: Gerrit Kühn To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Cc: Subject: kern/144330: mbuf leakage in nfsd with zfs 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: Fri, 26 Feb 2010 21:40:02 -0000 >Number: 144330 >Category: kern >Synopsis: mbuf leakage in nfsd with zfs >Confidential: no >Severity: critical >Priority: high >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Feb 26 21:40:02 UTC 2010 >Closed-Date: >Last-Modified: >Originator: Gerrit Kühn >Release: 8-stable as of 24th of Feb >Organization: AEI >Environment: FreeBSD mclane.rt.aei.uni-hannover.de 8.0-STABLE FreeBSD 8.0-STABLE #2: Fri Feb 26 14:15:47 CET 2010 root@mclane.rt.aei.uni-hannover.de:/usr/obj/usr/src/sys/GENERIC amd64 >Description: When serving nfs dirs from a zfs storage, mbuffers keep being drained, but are never freed. See http://www.pmp.uni-hannover.de/test/Mitarbeiter/g_kuehn/data/mbuf.pdf as an example. y-axis is output of total mbuf clusters by netstat -m, x-axis is time in minutes. The flat region in the upper right corner corresponds to approx. 10min with nfsd turned off. Several others report similar problems (see thread on -stable with topic "mbuf leakage with nfs/zfs? (was: em0 freezes on ZFS server)"). >How-To-Repeat: Server nfs-dirs from zfs storage with 8-stable and monitor mbuf usage. >Fix: Unknown, but urgently needed. :-) >Release-Note: >Audit-Trail: >Unformatted: