From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752120Ab2HBUkT (ORCPT ); Thu, 2 Aug 2012 16:40:19 -0400 Received: from smtp102.prem.mail.ac4.yahoo.com ([76.13.13.41]:43216 "HELO smtp102.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750949Ab2HBUkQ (ORCPT ); Thu, 2 Aug 2012 16:40:16 -0400 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: aAvE56wVM1kxmzipz.mLyScVDmfZYOhB15FqYAxSXHMHPgH F8egLSGjfhzEq9BjKm7iN5i.6gzvNzCOwGc4jQwv28FPHbnguvN6QDH26n45 5oASzi0NtxGL85pXkkY2Fk7lNEjDacf6mkYeTjKRKls9ce6BOSxs3KgKqm_4 4On3f4WgtMCmgEjDqF8PzvBTtZ5R56tUvNj40c8X1ZRP5RK7caz9tHnKP.g1 nHmh2q68kqXaAaNTcLA8XKd.GvMHuXd4Pmge9FKf_XY_9uzTtmPi5bO_Hdgd jV61ox.2qe2DlFfdIM0eCjV5ZCjXfl8E_3ZoDBEqIT_SBauNWQJouf6kWsIG 2m7GATEl0mBT_9Wyyh3Kgy_aVK_1.zu0PzK9C_.FT7QXaFgViD7im0XlXvgd SQGvjh285aKN3gi8wDRfAw3dgQqB0oVUabmi4HFUq62rqddoIwq0- X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- Date: Thu, 2 Aug 2012 15:40:11 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Peter Zijlstra cc: mingo@kernel.org, riel@redhat.com, oleg@redhat.com, pjt@google.com, akpm@linux-foundation.org, torvalds@linux-foundation.org, tglx@linutronix.de, Lee.Schermerhorn@hp.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH 19/19] mm, numa: retry failed page migrations In-Reply-To: <20120731192809.489683051@chello.nl> Message-ID: References: <20120731191204.540691987@chello.nl> <20120731192809.489683051@chello.nl> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 31 Jul 2012, Peter Zijlstra wrote: > Keep track of how many NUMA page migrations succeeded and > failed (in a way that wants retrying later) per process. It would be good if we could also somehow determine if that migration actually made sense? Were there enough accesses to the page so that the effort to migrate the page was amortized? Still skeptical on this endeavor.