From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757559AbYDWSRJ (ORCPT ); Wed, 23 Apr 2008 14:17:09 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753562AbYDWSQy (ORCPT ); Wed, 23 Apr 2008 14:16:54 -0400 Received: from host36-195-149-62.serverdedicati.aruba.it ([62.149.195.36]:43096 "EHLO mx.cpushare.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751945AbYDWSQx (ORCPT ); Wed, 23 Apr 2008 14:16:53 -0400 Date: Wed, 23 Apr 2008 20:16:51 +0200 From: Andrea Arcangeli To: Christoph Lameter Cc: Nick Piggin , Jack Steiner , Peter Zijlstra , kvm-devel@lists.sourceforge.net, Kanoj Sarcar , Roland Dreier , Steve Wise , linux-kernel@vger.kernel.org, Avi Kivity , linux-mm@kvack.org, Robin Holt , general@lists.openfabrics.org, Hugh Dickins , akpm@linux-foundation.org, Rusty Russell Subject: Re: [PATCH 04 of 12] Moves all mmu notifier methods outside the PT lock (first and not last Message-ID: <20080423181651.GH24536@duo.random> References: <20080422224048.GR24536@duo.random> <20080423134427.GW24536@duo.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Apr 23, 2008 at 11:02:18AM -0700, Christoph Lameter wrote: > We have had this workaround effort done years ago and have been > suffering the ill effects of pinning for years. Had to deal with Yes. In addition to the pinning, there's lot of additional tlb flushing work to do in kvm without mmu notifiers as the swapcache could be freed by the vm the instruction after put_page unpins the page for whatever reason. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrea Arcangeli Subject: [ofa-general] Re: [PATCH 04 of 12] Moves all mmu notifier methods outside the PT lock (first and not last Date: Wed, 23 Apr 2008 20:16:51 +0200 Message-ID: <20080423181651.GH24536@duo.random> References: <20080422224048.GR24536@duo.random> <20080423134427.GW24536@duo.random> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Nick Piggin , Rusty Russell , Peter Zijlstra , kvm-devel@lists.sourceforge.net, Kanoj Sarcar , Roland Dreier , Jack Steiner , linux-kernel@vger.kernel.org, Avi Kivity , linux-mm@kvack.org, Robin Holt , general@lists.openfabrics.org, Hugh Dickins , akpm@linux-foundation.org To: Christoph Lameter Return-path: Content-Disposition: inline In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: general-bounces@lists.openfabrics.org Errors-To: general-bounces@lists.openfabrics.org List-Id: kvm.vger.kernel.org On Wed, Apr 23, 2008 at 11:02:18AM -0700, Christoph Lameter wrote: > We have had this workaround effort done years ago and have been > suffering the ill effects of pinning for years. Had to deal with Yes. In addition to the pinning, there's lot of additional tlb flushing work to do in kvm without mmu notifiers as the swapcache could be freed by the vm the instruction after put_page unpins the page for whatever reason. From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Wed, 23 Apr 2008 20:16:51 +0200 From: Andrea Arcangeli Subject: Re: [PATCH 04 of 12] Moves all mmu notifier methods outside the PT lock (first and not last Message-ID: <20080423181651.GH24536@duo.random> References: <20080422224048.GR24536@duo.random> <20080423134427.GW24536@duo.random> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: owner-linux-mm@kvack.org Return-Path: To: Christoph Lameter Cc: Nick Piggin , Jack Steiner , Peter Zijlstra , kvm-devel@lists.sourceforge.net, Kanoj Sarcar , Roland Dreier , Steve Wise , linux-kernel@vger.kernel.org, Avi Kivity , linux-mm@kvack.org, Robin Holt , general@lists.openfabrics.org, Hugh Dickins , akpm@linux-foundation.org, Rusty Russell List-ID: On Wed, Apr 23, 2008 at 11:02:18AM -0700, Christoph Lameter wrote: > We have had this workaround effort done years ago and have been > suffering the ill effects of pinning for years. Had to deal with Yes. In addition to the pinning, there's lot of additional tlb flushing work to do in kvm without mmu notifiers as the swapcache could be freed by the vm the instruction after put_page unpins the page for whatever reason. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org