From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1161599AbXEDShV (ORCPT ); Fri, 4 May 2007 14:37:21 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1161608AbXEDShU (ORCPT ); Fri, 4 May 2007 14:37:20 -0400 Received: from amsfep17-int.chello.nl ([213.46.243.15]:4820 "EHLO amsfep14-int.chello.nl" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1161605AbXEDShR (ORCPT ); Fri, 4 May 2007 14:37:17 -0400 Subject: Re: [PATCH 08/40] mm: kmem_cache_objsize From: Peter Zijlstra To: Christoph Lameter Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org, Trond Myklebust , Thomas Graf , David Miller , James Bottomley , Mike Christie , Andrew Morton , Daniel Phillips , Pekka Enberg In-Reply-To: References: <20070504102651.923946304@chello.nl> <20070504103157.215424767@chello.nl> <1178301545.24217.56.camel@twins> <1178302904.2767.6.camel@lappy> Content-Type: text/plain Date: Fri, 04 May 2007 20:32:18 +0200 Message-Id: <1178303538.2767.9.camel@lappy> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Fri, 2007-05-04 at 11:30 -0700, Christoph Lameter wrote: > On Fri, 4 May 2007, Peter Zijlstra wrote: > > > > Ok so you really need the number of objects per page? If you know the > > > number of objects then you can calculate the pages needed which would be > > > the maximum memory needed? > > > > Yes, that would work. > > Hmmm... Maybe lets have > > unsigned kmem_estimate_pages(struct kmem_cache *slab_cache, int objects) > > which would calculate the worst case memory scenario for allocation the > number of indicated objects? Perfectly fine with me, Pekka, any objections?