Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 2 Aug 2002 11:23:44 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 2 Aug 2002 11:23:44 -0400 Received: from deimos.hpl.hp.com ([192.6.19.190]:24046 "EHLO deimos.hpl.hp.com") by vger.kernel.org with ESMTP id ; Fri, 2 Aug 2002 11:23:43 -0400 From: David Mosberger MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15690.42180.82563.681075@napali.hpl.hp.com> Date: Fri, 2 Aug 2002 08:27:00 -0700 To: "David S. Miller" Cc: davidm@hpl.hp.com, davidm@napali.hpl.hp.com, gh@us.ibm.com, riel@conectiva.com.br, akpm@zip.com.au, linux-kernel@vger.kernel.org, linux-mm@kvack.org, rohit.seth@intel.com, sunil.saxena@intel.com, asit.k.mallick@intel.com Subject: Re: large page patch In-Reply-To: <20020802.012040.105531210.davem@redhat.com> References: <15690.6005.624237.902152@napali.hpl.hp.com> <20020801.222053.20302294.davem@redhat.com> <15690.9727.831144.67179@napali.hpl.hp.com> <20020802.012040.105531210.davem@redhat.com> X-Mailer: VM 7.07 under Emacs 21.2.1 Reply-To: davidm@hpl.hp.com X-URL: http://www.hpl.hp.com/personal/David_Mosberger/ Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 892 Lines: 21 >>>>> On Fri, 02 Aug 2002 01:20:40 -0700 (PDT), "David S. Miller" said: Dave.M> A "hint" to use superpages? That's absurd. Dave.M> Any time you are able to translate N pages instead of 1 page Dave.M> with 1 TLB entry it's always preferable. Yeah, right. So you think a 256MB page-size is optimal for all apps? What you're missing is how you *get* to the point where you can map N pages with a single TLB entry. For that to happen, you need to allocate physically contiguous and properly aligned memory (at least given the hw that's common today). Doing has certain costs, no matter what your approach is. --david - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/