Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 23 Apr 2002 22:42:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 23 Apr 2002 22:42:10 -0400 Received: from boo-mda02.boo.net ([216.200.67.22]:6930 "EHLO boo-mda02.boo.net") by vger.kernel.org with ESMTP id convert rfc822-to-8bit; Tue, 23 Apr 2002 22:42:09 -0400 Message-Id: <3.0.6.32.20020423224811.007ce440@boo.net> X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.6 (32) Date: Tue, 23 Apr 2002 22:48:11 -0400 To: linux-kernel@vger.kernel.org From: Jason Papadopoulos Subject: Re: [PATCH] page coloring for 2.4.18 kernel In-Reply-To: <1019598814.1465.254.camel@phantasy> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org At 05:53 PM 4/23/02 -0400, Robert Love wrote: >On Tue, 2002-04-23 at 17:51, Dieter N?tzel wrote: > >> Page coloring for 2.4.18+ isn't preempt save? >> >> It gave ~10% speedup for memory intensive apps on my single 1 GHz Athlon II >> SlotA (0,18?m, L2 512K) but look the system hard from time to time. Nothing >> in the logs. >> >> I've changed the patch for 2.4.19-pre7 + vm3 + latest rml-O(1) + preempt. > >Beats me. Some of the implementations of page colouring I have seen are >not even SMP-safe. > >"Don't do that" While I haven't tested on an SMP system, the patch should at least be SMP safe. As for preempt-safe, I noticed in Dieter's previous tests that the free list had been sufficiently fragmented that there were no high- order groups of pages left available. Could this cause a problem? I can't track this list carefully enough to apply and test all the patches mentioned. jasonp - 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/