linux-kernel - Re: [PATCH 2/3] memory-hotplug: more general validation of zone during online

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Message-ID: <20160510203943.GA22115@arbab-laptop.austin.ibm.com>
Date:	Tue, 10 May 2016 15:39:43 -0500
From:	Reza Arbab <arbab@...ux.vnet.ibm.com>
To:	Yasuaki Ishimatsu <yasu.isimatu@...il.com>
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Daniel Kiper <daniel.kiper@...cle.com>,
	Dan Williams <dan.j.williams@...el.com>,
	Vlastimil Babka <vbabka@...e.cz>,
	Tang Chen <tangchen@...fujitsu.com>,
	Joonsoo Kim <iamjoonsoo.kim@....com>,
	David Vrabel <david.vrabel@...rix.com>,
	Vitaly Kuznetsov <vkuznets@...hat.com>,
	David Rientjes <rientjes@...gle.com>,
	Andrew Banman <abanman@....com>,
	Chen Yucong <slaoub@...il.com>, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org,
	Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com>
Subject: Re: [PATCH 2/3] memory-hotplug: more general validation of zone
 during online

On Tue, May 10, 2016 at 11:08:56AM -0700, Yasuaki Ishimatsu wrote:
>On Mon,  9 May 2016 12:53:38 -0500
>Reza Arbab <arbab@...ux.vnet.ibm.com> wrote:
>> * If X is lower than Y, the onlined memory must lie at the end of X.
>> * If X is higher than Y, the onlined memory must lie at the start of X.
>
>If memory address has hole, memory address gets uncotinuous. Then memory
>cannot be changed the zone by above the two conditions. So the conditions
>shouold be removed.

I don't understand what you mean by this. Could you give an example?

-- 
Reza Arbab