From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754595AbcGZBDv (ORCPT ); Mon, 25 Jul 2016 21:03:51 -0400 Received: from mail-qk0-f193.google.com ([209.85.220.193]:36722 "EHLO mail-qk0-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752481AbcGZBDs (ORCPT ); Mon, 25 Jul 2016 21:03:48 -0400 Date: Mon, 25 Jul 2016 21:03:44 -0400 From: Tejun Heo To: Andrew Morton Cc: Dou Liyang , cl@linux.com, mika.j.penttila@gmail.com, mingo@redhat.com, rjw@rjwysocki.net, hpa@zytor.com, yasu.isimatu@gmail.com, isimatu.yasuaki@jp.fujitsu.com, kamezawa.hiroyu@jp.fujitsu.com, izumi.taku@jp.fujitsu.com, gongzhaogang@inspur.com, len.brown@intel.com, lenb@kernel.org, tglx@linutronix.de, chen.tang@easystack.cn, rafael@kernel.org, x86@kernel.org, linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v9 0/7] Make cpuid <-> nodeid mapping persistent Message-ID: <20160726010344.GO19588@mtj.duckdns.org> References: <1469435749-19582-1-git-send-email-douly.fnst@cn.fujitsu.com> <20160725162022.e90e9c6c74a5d147e39e5945@linux-foundation.org> <20160726001151.GN19588@mtj.duckdns.org> <20160725172549.e5a23d495a356f026fbb28fa@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160725172549.e5a23d495a356f026fbb28fa@linux-foundation.org> User-Agent: Mutt/1.6.1 (2016-04-27) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Mon, Jul 25, 2016 at 05:25:49PM -0700, Andrew Morton wrote: > > Yeah, that was one of the early approaches. The issue isn't limited > > to wq. Any memory allocation can have similar issues of underlying > > node association changing and we don't have any synchronization > > mechanism around it. It doesn't make any sense to make NUMA > > association dynamic when the consumer surface is vastly larger and > > there's nothing inherently dynamic about the association itself. > > And other architectures? No idea but it only matters for NUMA + CPU hotplug combination where a whole node can go empty, which would at most be a few archs. Thanks. -- tejun