Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933053AbdDEJXS (ORCPT ); Wed, 5 Apr 2017 05:23:18 -0400 Received: from mx2.suse.de ([195.135.220.15]:33495 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932632AbdDEJXQ (ORCPT ); Wed, 5 Apr 2017 05:23:16 -0400 Date: Wed, 5 Apr 2017 11:23:11 +0200 From: Michal Hocko To: Igor Mammedov Cc: linux-mm@kvack.org, Andrew Morton , Mel Gorman , Vlastimil Babka , Andrea Arcangeli , Reza Arbab , Yasuaki Ishimatsu , Tang Chen , qiuxishi@huawei.com, Kani Toshimitsu , slaoub@gmail.com, Joonsoo Kim , Andi Kleen , David Rientjes , Daniel Kiper , Vitaly Kuznetsov , LKML Subject: Re: [PATCH v1 1/6] mm: get rid of zone_is_initialized Message-ID: <20170405092311.GF6035@dhcp22.suse.cz> References: <20170330115454.32154-1-mhocko@kernel.org> <20170330115454.32154-2-mhocko@kernel.org> <20170331073954.GF27098@dhcp22.suse.cz> <20170405081400.GE6035@dhcp22.suse.cz> <20170405110654.6ef458ee@nial.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170405110654.6ef458ee@nial.brq.redhat.com> User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1628 Lines: 37 On Wed 05-04-17 11:06:54, Igor Mammedov wrote: > On Wed, 5 Apr 2017 10:14:00 +0200 > Michal Hocko wrote: > > > On Fri 31-03-17 09:39:54, Michal Hocko wrote: > > > Fixed screw ups during the initial patch split up as per Hillf > > > --- > > > From 8be6c5e47de66210e47710c80e72e8abd899017b Mon Sep 17 00:00:00 2001 > > > From: Michal Hocko > > > Date: Wed, 29 Mar 2017 15:11:30 +0200 > > > Subject: [PATCH] mm: get rid of zone_is_initialized > > > > > > There shouldn't be any reason to add initialized when we can tell the > > > same thing from checking whether there are any pages spanned to the > > > zone. Remove zone_is_initialized() and replace it by zone_is_empty > > > which can be used for the same set of tests. > > > > > > This shouldn't have any visible effect > > > > I've decided to drop this patch. My main motivation was to simplify > > the hotplug workflow/ The situation is more hairy than I expected, > > though. On one hand all zones should be initialized early during the > > hotplug in add_memory_resource but direct users of arch_add_memory will > > need this to be called I suspect. Let's just keep the current status quo > > and clean up it later. It is not really needed for this series. > Would you post v2 with all fixups you've done so far? yes, but I would like to sort what Reza Arbab is seeing first. I have pushed my current changes to [1] for others to have something to play with [1] git://git.kernel.org/pub/scm/linux/kernel/git/mhocko/mm.git attempts/rewrite-mem_hotplug-WIP branch. Please note I might rebase it later -- Michal Hocko SUSE Labs