From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabien Salvi Subject: Re: SCSI Disk layer performance Date: Fri, 23 Jan 2004 12:02:46 +0100 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <4010FF56.2060806@cri74.org> References: <1074720667.19927.384.camel@localhost.lnxi.com> <20040122135703.A11283@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from aravis.cur-archamps.fr ([195.202.0.99]:61887 "EHLO aravis.cur-archamps.fr") by vger.kernel.org with ESMTP id S266552AbUAWLCt (ORCPT ); Fri, 23 Jan 2004 06:02:49 -0500 List-Id: linux-scsi@vger.kernel.org To: Christoph Hellwig Cc: linux-scsi@vger.kernel.org Christoph Hellwig a e'crit: > On Wed, Jan 21, 2004 at 02:31:08PM -0700, Chris Worley wrote: > >>My FC array seems to be faster than Linux can handle. >> >>Even though I'm using FC-2 cards, Linux seems to put >>an artificial limit at FC-1 speeds. This is true in two cases: > > > What kernel tree do you use? If you're looking for decent scsi > performance use linux 2.6 or the SuSE/RH vendor trees. Stock Linux 2.4 > is basically unusable for higher scsi loads in SMP enviroments. Can you give more details about this ? Instead of using vendor trees, is it possible to use specific and validated patchs about this ? vendors trees are awfully patched and difficult to maintain/upgrade for customers... -- Fabien S