From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S935372AbXGZVgK (ORCPT ); Thu, 26 Jul 2007 17:36:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1764507AbXGZVf5 (ORCPT ); Thu, 26 Jul 2007 17:35:57 -0400 Received: from gate.crashing.org ([63.228.1.57]:46735 "EHLO gate.crashing.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763834AbXGZVf4 (ORCPT ); Thu, 26 Jul 2007 17:35:56 -0400 Subject: Re: [patch] mm: reduce pagetable-freeing latencies From: Benjamin Herrenschmidt To: Hugh Dickins Cc: Andi Kleen , Peter Zijlstra , Andrew Morton , Ingo Molnar , linux-kernel@vger.kernel.org In-Reply-To: References: <20070724083855.GA858@elte.hu> <20070724015441.8604d85d.akpm@linux-foundation.org> <1185270045.5439.249.camel@localhost.localdomain> <1185312559.5439.276.camel@localhost.localdomain> <1185345850.8197.64.camel@twins> <20070725094605.GA9045@one.firstfloor.org> <1185358093.5439.325.camel@localhost.localdomain> <20070725102608.GB9045@one.firstfloor.org> <1185360414.5439.335.camel@localhost.localdomain> Content-Type: text/plain Date: Fri, 27 Jul 2007 07:35:15 +1000 Message-Id: <1185485715.5495.127.camel@localhost.localdomain> Mime-Version: 1.0 X-Mailer: Evolution 2.10.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 2007-07-26 at 18:11 +0100, Hugh Dickins wrote: > That will often be the case for anonymous pages, but not for pagecache > pages. I had wondered whether to make exit_mmap unmap the stack first > (rather than text first as usually happens), but seems rather a hack. Yup and defeated by HIGHMEM ,so I'm back to per-cpu page lists for now and we'll see how to move to the next step once I've ironed out other issues such as sparc64/ia64 related bits. Ben.