Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S263344AbTIIMYd (ORCPT ); Tue, 9 Sep 2003 08:24:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264073AbTIIMYd (ORCPT ); Tue, 9 Sep 2003 08:24:33 -0400 Received: from ppp-217-133-42-200.cust-adsl.tiscali.it ([217.133.42.200]:51410 "EHLO dualathlon.random") by vger.kernel.org with ESMTP id S263344AbTIIMYb (ORCPT ); Tue, 9 Sep 2003 08:24:31 -0400 Date: Tue, 9 Sep 2003 14:25:47 +0200 From: Andrea Arcangeli To: Stephan von Krawczynski Cc: linux-kernel , Neil Brown Subject: Re: experiences beyond 4 GB RAM with 2.4.22 Message-ID: <20030909122547.GN21086@dualathlon.random> References: <20030909110112.4d634896.skraw@ithnet.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20030909110112.4d634896.skraw@ithnet.com> User-Agent: Mutt/1.4i X-GPG-Key: 1024D/68B9CB43 13D9 8355 295F 4823 7C49 C012 DFA1 686E 68B9 CB43 X-PGP-Key: 1024R/CB4660B9 CC A0 71 81 F4 A0 63 AC C0 4B 81 1D 8C 15 C8 E5 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2343 Lines: 60 On Tue, Sep 09, 2003 at 11:01:12AM +0200, Stephan von Krawczynski wrote: > Hello, > > lately I upgraded my testbox from 2 to 6 GB ram and found out some oddities I > would like to hear your opinions. > The box ran flawlessly and performant with 2 GB - was in fact a real joy. > After upgrading the ram and recompiling kernel 2.4.22 with support for 64 GB I > noticed: > > 1) nfs clients see timeouts again, like > > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 OK > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:37:35 clienta kernel: nfs: server 192.168.1.1 OK > Sep 9 03:41:13 clienta kernel: nfs: server 192.168.1.1 not responding, still > trying > Sep 9 03:41:13 clienta kernel: nfs: server 192.168.1.1 OK > > Both are 2.4.22. 192.168.1.1 is the testbox. I saw those with 2GB, but could > fix it through more nfs-daemons and > > echo 2097152 >/proc/sys/net/core/rmem_max > echo 2097152 >/proc/sys/net/core/wmem_max > > Are these values too small for 6 GB? > > 2) Box is very slow, kswapd looks very active during tar of a local harddisk. > Interactivity is really bad. Seems vm has a high time looking for free or > usable pages. Compared to 2 GB the behaviour is unbelievably bad. > > 3) Network performance has a remarkable dropdown during above tar. In fact > doing simple pings every few minutes shows that quite a lot of them are simply > dropped, never make it over the ethernet. > > I am really astonished about this. Can some kind soul give me hints or maybe > patches to try? for the vm issues my suggestion is to try again with 2.4.22aa1. Andrea /* * If you refuse to depend on closed software for a critical * part of your business, these links may be useful: * * rsync.kernel.org::pub/scm/linux/kernel/bkcvs/linux-2.5/ * rsync.kernel.org::pub/scm/linux/kernel/bkcvs/linux-2.4/ * http://www.cobite.com/cvsps/ * * svn://svn.kernel.org/linux-2.6/trunk * svn://svn.kernel.org/linux-2.4/trunk */ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/