From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S264980AbUGMNAl (ORCPT ); Tue, 13 Jul 2004 09:00:41 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S264953AbUGMNAl (ORCPT ); Tue, 13 Jul 2004 09:00:41 -0400 Received: from e34.co.us.ibm.com ([32.97.110.132]:13993 "EHLO e34.co.us.ibm.com") by vger.kernel.org with ESMTP id S264980AbUGMM7k (ORCPT ); Tue, 13 Jul 2004 08:59:40 -0400 Date: Tue, 13 Jul 2004 07:59:03 -0500 From: "Jose R. Santos" To: Dave Hansen Cc: "Jose R. Santos" , dhowells@redhat.com, Andrew Morton , Linux Kernel Mailing List , slpratt@us.ibm.com Subject: Re: [PATCH] Making i/dhash_entries cmdline work as it use to. Message-ID: <20040713125903.GC9149@rx8.austin.ibm.com> References: <20040712175605.GA1735@rx8.austin.ibm.com> <20040713023721.GA7461@austin.ibm.com> <1089699910.19847.13357.camel@nighthawk> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Disposition: inline Content-Transfer-Encoding: 7BIT In-Reply-To: <1089699910.19847.13357.camel@nighthawk> (from haveblue@us.ibm.com on Tue, Jul 13, 2004 at 01:25:10 -0500) X-Mailer: Balsa 2.0.17 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On 07/13/04 01:25:10, Dave Hansen wrote: > Do you worry that you're just expanding the hash table as long as it > gives benefit on your one, single benchmark? There have to be plenty of > other workloads that could benefit from an extra 1/16th more memory. > Not every workload is as dcache heavy as SFS. This does not change the normal behavior of the kernel. This only has effect when you use the cmdline options to increase it. I only use 1/256 of my memory for hashes but there might be someone else crazier than me that wants more. Of course the 1/16 number could be change to something a lot smaller but i should give people some room to play with. -JRS