Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932142AbVIGO2r (ORCPT ); Wed, 7 Sep 2005 10:28:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932144AbVIGO2q (ORCPT ); Wed, 7 Sep 2005 10:28:46 -0400 Received: from dvhart.com ([64.146.134.43]:59017 "EHLO localhost.localdomain") by vger.kernel.org with ESMTP id S932142AbVIGO2q (ORCPT ); Wed, 7 Sep 2005 10:28:46 -0400 Date: Wed, 07 Sep 2005 07:28:44 -0700 From: "Martin J. Bligh" Reply-To: "Martin J. Bligh" To: Christoph Lameter , torvalds@osdl.org Cc: akpm@osdl.org, nickpiggin@yahoo.com.au, hugh@veritas.com, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: Hugh's alternate page fault scalability approach on 512p Altix Message-ID: <20660000.1126103324@[10.10.2.4]> In-Reply-To: References: X-Mailer: Mulberry/2.2.1 (Linux/x86) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 666 Lines: 16 > Anticipatory prefaulting raises the highest fault rate obtainable three-fold > through gang scheduling faults but may allocate some pages to a task that are > not needed. IIRC that costed more than it saved, at least for forky workloads like a kernel compile - extra cost in zap_pte_range etc. If things have changed substantially in that path, I guess we could run the numbers again - has been a couple of years. M. - 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/