Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Tue, 17 Sep 2002 16:50:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Tue, 17 Sep 2002 16:50:56 -0400 Received: from packet.digeo.com ([12.110.80.53]:9428 "EHLO packet.digeo.com") by vger.kernel.org with ESMTP id ; Tue, 17 Sep 2002 16:50:56 -0400 Message-ID: <3D8796D5.A4ACD5FA@digeo.com> Date: Tue, 17 Sep 2002 13:55:49 -0700 From: Andrew Morton X-Mailer: Mozilla 4.79 [en] (X11; U; Linux 2.4.19-pre4 i686) X-Accept-Language: en MIME-Version: 1.0 To: Roberto Nibali CC: linux-kernel@vger.kernel.org Subject: Re: TLB flush counters gone in 2.5.35-bk? References: <3D874DA1.20803@drugphish.ch> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 17 Sep 2002 20:55:49.0379 (UTC) FILETIME=[9A1C8D30:01C25E8C] Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 708 Lines: 20 Roberto Nibali wrote: > > Hello, > > I was just browsing over the latest bk tree when I saw the following change: > > ... > - unsigned long flushes;/* stats: count avoided flushes */ > - unsigned long avoided_flushes; That was some statistical/debug code to evaluate how useful that particular optimisation was being. Answer: it saves 30-35% of the global TLB invalidations coming out of there. But it had served its purpose. - 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/