Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Mon, 1 Apr 2002 07:24:40 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Mon, 1 Apr 2002 07:24:32 -0500 Received: from postman.arcor-online.net ([151.189.0.87]:24586 "EHLO postman.arcor-online.net") by vger.kernel.org with ESMTP id ; Mon, 1 Apr 2002 07:24:26 -0500 Date: Mon, 1 Apr 2002 14:15:50 +0200 From: Stefan Frank To: linux-kernel@vger.kernel.org Subject: 2.4.1X>: Possible SMP<->Networking kernel bug ? Message-ID: <20020401121550.GA14359@asterix> Mail-Followup-To: linux-kernel@vger.kernel.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="AhhlLboLdkugWU4S" Content-Disposition: inline Content-Transfer-Encoding: 8bit User-Agent: Mutt/1.3.28i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org --AhhlLboLdkugWU4S Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit Hi, since some time i have a problem with my SMP system ('obelix'). The symptom is that i cannot transfer big files onto this system (the server). It doesn't matter wether i use scp,ftp or nfs (knfsd) . With NFS i receive an error message "file too big" as soon as i copy files about 2MB large. Either scp or ftp (upload always) will simply get stuck sooner or later. The maximum i succeeded was to copy about 230MB out of an 680MB divx movie. But it also stopped at ~50MB once. Please note that there are no further error messages in the log files. I have attached the tcpdump output of such a failed scp attempt. This has been happening since some time now, and finally i started looking into it. So i compiled a released 2.4.18 kernel (without any additional patches) with different options. The result is that when i disable SMP this Problem is gone! No more NFS error messages copying a 680MB divx movie. Also neither ftp nor scp got stuck once. This leads me to believe that it might be some strange issue with my hardware and SMP or a kernel issue. Here's more about this SMP server: (dmesg output is attached) - Asus CUV4X-D motherboard with latest bios 1014 - 2x PIII-Coppermine/866 MHz - 2x 512 MB PC133 RAM - Compaq NC3134 Dual-NIC (using the eepro100 driver) but same problem when using a no-name 100MBit card with the 8139too driver The output of ver_linux (Kernel compiled on another machine!): sfr@obelix:~$ ver_linux If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes. Linux obelix 2.4.18-o1 #1 SMP Son M?r 31 19:13:52 CEST 2002 i686 unknown /usr/local/bin/ver_linux: gcc: command not found Gnu C Gnu make 3.79.1 util-linux 2.11n mount 2.11n modutils 2.4.15 e2fsprogs 1.27 pcmcia-cs 3.1.28 PPP 2.4.1 Linux C Library 2.2.5 Dynamic linker (ldd) 2.2.5 Procps 2.0.7 Net-tools 1.60 Console-tools 0.2.3 Sh-utils 2.0.11 Modules Loaded ipt_state ipt_REJECT ipt_REDIRECT ipt_MASQUERADE ipt_unclean ipt_LOG ipt_limit ipt_TOS iptable_filter iptable_nat ip_conntrack iptable_mangle ip_tables ppp_async ppp_generic slhc ide-probe-mod ide-mod ospm_processor ospm_button ospm_system ospm_busmgr rtc Used compiler: sfr@asterix:~$ gcc -v Reading specs from /usr/lib/gcc-lib/i386-linux/2.95.4/specs gcc version 2.95.4 20011002 (Debian prerelease) I'd be happy to do additional test. 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