From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755996AbYAYL4H (ORCPT ); Fri, 25 Jan 2008 06:56:07 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751574AbYAYLzy (ORCPT ); Fri, 25 Jan 2008 06:55:54 -0500 Received: from mailsrv1.zmi.at ([212.69.162.198]:50540 "EHLO mailsrv1.zmi.at" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751560AbYAYLzx (ORCPT ); Fri, 25 Jan 2008 06:55:53 -0500 From: Michael Monnerie Organization: it-management http://it-management.at To: netatalk-admins@lists.sourceforge.net Subject: netatalk slow after system upgrade (possibly kernel problem?) Date: Fri, 25 Jan 2008 12:55:42 +0100 User-Agent: KMail/1.9.6 (enterprise 20070904.708012) Cc: linux-kernel@vger.kernel.org MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart6632945.TfUIJRfp3V"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200801251255.48105@zmi.at> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --nextPart6632945.TfUIJRfp3V Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Dear lists, I've been spending a LOT of time trying to find out where's the problem,=20 but can't find it and therefore seek urgent help now. We have the=20 following system: Server with VMware server =2D> VM running a webserver and netatalk =2D> 2 other VMs not related The VM with netatalk was SUSE 10.0 with kernel 2.6.13-15.15-smp (from=20 SUSE), and things were pretty fun and quick. Then we upgraded to SUSE=20 10.2 and now 10.3, where everything EXCEPT netatalk runs perfect. Since=20 this upgrade, Apple clients (MacOS X) now do READ very very slowly=20 (about 512KB/s over the gigabit LAN), while writing to the server still=20 is normal (>20MB/s). I've even retried with the newest kernel=20 2.6.23.13, tried different /proc/sys/net/ipv4/tcp_congestion_control=20 (cubic, reno, bic, etc.) and nothing helps. I've then tried to install=20 Samba and found that we have similar problems reading with it from=20 MacOS clients. Now I'm pretty sure it should be something with the=20 linux kernel, but I don't understand what. Here are the wireshark dumps in pcap format: http://zmi.at/x/atalk-write-fast.pcap =2D> you can see writing to the server (192.168.120.9) is normal and fast http://zmi.at/x/atalk-read-slow.pcap =2D> reading is horribly slow. Lots of "unknown", because of netatalk or=20 what? http://zmi.at/x/unknown-atalk.pcap =2D> another dump while reading, you see "unknown" reads. I'm not sure if=20 it's just wireshark not understanding the packets or netatalk. And trying with samba: http://zmi.at/x/smb-read-slow.pcap http://zmi.at/x/smb-write-quick.pcap you can see that it's also slow. Now why did it work with the old 2.6.13 kernel? I still have that old=20 VM, and when I start it, it is always perfectly fast. Only newer=20 versions are slow. Can somebody give me a hint please? mfg zmi =2D-=20 // Michael Monnerie, Ing.BSc ----- http://it-management.at // Tel: 0676/846 914 666 .network.your.ideas. // PGP Key: "curl -s http://zmi.at/zmi.asc | gpg --import" // Fingerprint: AC19 F9D5 36ED CD8A EF38 500E CE14 91F7 1C12 09B4 // Keyserver: www.keyserver.net Key-ID: 1C1209B4 --nextPart6632945.TfUIJRfp3V Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4-svn0 (GNU/Linux) iD8DBQBHmc5EzhSR9xwSCbQRAoEQAKDoG5CEGGDORjDVZGBwaJxiYWHdcgCgxsUG rI8osiKsMQ6I1Qby0n/CE2s= =Jd7R -----END PGP SIGNATURE----- --nextPart6632945.TfUIJRfp3V--