From owner-freebsd-bugs@FreeBSD.ORG Thu Nov 7 15:20:00 2013 Return-Path: Delivered-To: freebsd-bugs@smarthost.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTP id D93BB128 for ; Thu, 7 Nov 2013 15:20:00 +0000 (UTC) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:1900:2254:206c::16:87]) (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 B7A8C273C for ; Thu, 7 Nov 2013 15:20:00 +0000 (UTC) Received: from freefall.freebsd.org (localhost [127.0.0.1]) by freefall.freebsd.org (8.14.7/8.14.7) with ESMTP id rA7FK0Mr042992 for ; Thu, 7 Nov 2013 15:20:00 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.14.7/8.14.7/Submit) id rA7FK0R8042991; Thu, 7 Nov 2013 15:20:00 GMT (envelope-from gnats) Resent-Date: Thu, 7 Nov 2013 15:20:00 GMT Resent-Message-Id: <201311071520.rA7FK0R8042991@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, Ralf Wenk 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 B0E04D50 for ; Thu, 7 Nov 2013 15:13:54 +0000 (UTC) (envelope-from nobody@FreeBSD.org) Received: from oldred.freebsd.org (oldred.freebsd.org [8.8.178.121]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.freebsd.org (Postfix) with ESMTPS id 9CBCD26E3 for ; Thu, 7 Nov 2013 15:13:54 +0000 (UTC) Received: from oldred.freebsd.org ([127.0.1.6]) by oldred.freebsd.org (8.14.5/8.14.7) with ESMTP id rA7FDrnD026774 for ; Thu, 7 Nov 2013 15:13:53 GMT (envelope-from nobody@oldred.freebsd.org) Received: (from nobody@localhost) by oldred.freebsd.org (8.14.5/8.14.5/Submit) id rA7FDrnS026739; Thu, 7 Nov 2013 15:13:53 GMT (envelope-from nobody) Message-Id: <201311071513.rA7FDrnS026739@oldred.freebsd.org> Date: Thu, 7 Nov 2013 15:13:53 GMT From: Ralf Wenk To: freebsd-gnats-submit@FreeBSD.org X-Send-Pr-Version: www-3.1 Subject: kern/183753: Regression since r255138: network is slow, kernel: failed to create new mbuf X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 Nov 2013 15:20:01 -0000 >Number: 183753 >Category: kern >Synopsis: Regression since r255138: network is slow, kernel: failed to create new mbuf >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Thu Nov 07 15:20:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Ralf Wenk >Release: FreeBSD 10.0-CURRENT arm >Organization: Hochschule Karlsruhe, University of Applied Sciences >Environment: FreeBSD raspberry-pi 10.0-CURRENT FreeBSD 10.0-CURRENT #0 r255138: Wed Nov 6 08:42:26 CET 2013 root@IZ-FreeBSD1:/usr/obj/arm.armv6/root/rpi/255138/sys/RPI-Bsc arm >Description: While rsync(1)-ing an 1 GB file the RPi gets almost unresponsible after a while and on the serial console there are lots of smsc0: warning: failed to create new mbuf kernel messages. Occasionaly dotted with the [zone: mbuf_cluster] kern.ipc.nmbclusters limit reached kernel message. rsync shows a transfer speed of 27.40kB/s (over DSL) even if the files are already in sync and only the timestamps differ. Increasing the value of kern.ipc.nmbclusters by the factor of 2 just delayed the moment the problem happens. The first release which shows this is r25518. r255166 and older do not. rsync shows a transfer speed of 535.46kB/s (over DSL) on r255166 and older releases. >How-To-Repeat: Use a 1GB file as transfer file. If already transfered touch(1) transfer file at the source host. rsync -trv --modify-window=1 --compress --progress --stats --inplace --delete transfer_file user@target.host:/path/to/ Await problem around 10% of the file is transfered. >Fix: Undo r255138. >Release-Note: >Audit-Trail: >Unformatted: