From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 7 Sep 2001 13:10:23 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 7 Sep 2001 13:10:06 -0400 Received: from e24.nc.us.ibm.com ([32.97.136.230]:45250 "EHLO e24.nc.us.ibm.com") by vger.kernel.org with ESMTP id ; Fri, 7 Sep 2001 13:09:47 -0400 Date: Fri, 7 Sep 2001 10:04:56 -0700 From: lahr To: Peter Wong Cc: linux-kernel@vger.kernel.org, lse-tech@lists.sourceforge.net, Hans Tannenberger , Ruth Forester , "Carbonari, Steven" Subject: Re: Lockmeter Analysis of 2 DDs Message-ID: <20010907100456.A11427@us.ibm.com> In-Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: ; from wpeter@us.ibm.com on Fri, Sep 07, 2001 at 10:47:37AM -0500 X-Operating-System: Linux 2.0.32 on an i486 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > Indeed, io_request_lock is very hot once the bounce buffers were > eliminated. Is anyone working on a patch for the io_request_lock that > possibly take the global lock and splits it into a per device queue lock? > We understand that getting this patch into 2.4 is unlikely, but it would > be nice to have this patch available on 2.4 for experimental purposes. I recently published a patch for 2.4 that addresses this exact issue at http://lse.sourceforge.net/io/ Jonathan -- Jonathan Lahr IBM Linux Technology Center Beaverton, Oregon lahr@us.ibm.com 503-578-3385