From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262114AbTLIKk7 (ORCPT ); Tue, 9 Dec 2003 05:40:59 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262115AbTLIKk7 (ORCPT ); Tue, 9 Dec 2003 05:40:59 -0500 Received: from intra.cyclades.com ([64.186.161.6]:26580 "EHLO intra.cyclades.com") by vger.kernel.org with ESMTP id S262114AbTLIKkT (ORCPT ); Tue, 9 Dec 2003 05:40:19 -0500 Date: Tue, 9 Dec 2003 08:31:18 -0200 (BRST) From: Marcelo Tosatti X-X-Sender: marcelo@logos.cnet To: Per Andreas Buer Cc: William Lee Irwin III , Subject: Re: 2.4: mylex and > 2GB RAM In-Reply-To: <1070917304.1260.44.camel@localhost.localdomain> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Cyclades-MailScanner-Information: Please contact the ISP for more information X-Cyclades-MailScanner: Found to be clean Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 8 Dec 2003, Per Andreas Buer wrote: > On Mon, 2003-12-08 at 21:22, William Lee Irwin III wrote: > > > > It could potentially slow it down a lot more than a few percent. > > > > The main effect you would see is heavy low memory consumption (LowFree: > > going down to almost nothing) and very heavy cpu consumption. > > Right on. LowFree drops and when it reaches almost nothing the system > more or less goes freezes. > > The DAC960 driver is not a SCSI driver so this means that there is > something wrong with the PCI-DMA transfers, right? > > Replacing the DAC960 with another RAID-kontroller will not help because > it will use the same PCI-DMA transfers, right? Any hints on how I can > mend this? Per, You may want to give 2.4.23 a try. The VM has been changed to balance the memory in a "saner" way wrt highmem.