linux-kernel - Re: [PATCH v1 1/6] mm: get rid of zone_is

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Message-ID: <20170405110654.6ef458ee@nial.brq.redhat.com>
Date:   Wed, 5 Apr 2017 11:06:54 +0200
From:   Igor Mammedov <imammedo@...hat.com>
To:     Michal Hocko <mhocko@...nel.org>
Cc:     linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
        Mel Gorman <mgorman@...e.de>, Vlastimil Babka <vbabka@...e.cz>,
        Andrea Arcangeli <aarcange@...hat.com>,
        Reza Arbab <arbab@...ux.vnet.ibm.com>,
        Yasuaki Ishimatsu <yasu.isimatu@...il.com>,
        Tang Chen <tangchen@...fujitsu.com>, qiuxishi@...wei.com,
        Kani Toshimitsu <toshi.kani@....com>, slaoub@...il.com,
        Joonsoo Kim <js1304@...il.com>,
        Andi Kleen <ak@...ux.intel.com>,
        David Rientjes <rientjes@...gle.com>,
        Daniel Kiper <daniel.kiper@...cle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/6] mm: get rid of zone_is_initialized

On Wed, 5 Apr 2017 10:14:00 +0200
Michal Hocko <mhocko@...nel.org> 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 <mhocko@...e.com>
> > 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?