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Date: Fri, 31 Mar 2017 21:19:24 +0200
From: Heiko Carstens <heiko.carstens@de.ibm.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: linux-mm@kvack.org, Andrew Morton <akpm@linux-foundation.org>,
        Mel Gorman <mgorman@suse.de>, Vlastimil Babka <vbabka@suse.cz>,
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        David Rientjes <rientjes@google.com>,
        Daniel Kiper <daniel.kiper@oracle.com>,
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        Dan Williams <dan.j.williams@gmail.com>,
        Lai Jiangshan <laijs@cn.fujitsu.com>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Michal Hocko <mhocko@suse.com>,
        Gerald Schaefer <gerald.schaefer@de.ibm.com>
Subject: Re: [PATCH 0/6] mm: make movable onlining suck less
References: <20170330115454.32154-1-mhocko@kernel.org>
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On Thu, Mar 30, 2017 at 01:54:48PM +0200, Michal Hocko wrote:
> Patch 5 is the core of the change. In order to make it easier to review
> I have tried it to be as minimalistic as possible and the large code
> removal is moved to patch 6.
> 
> I would appreciate if s390 folks could take a look at patch 4 and the
> arch_add_memory because I am not sure I've grokked what they wanted to
> achieve there completely.

[adding Gerald Schaefer]

This seems to work fine on s390. So for the s390 bits:
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>