linux-kernel - Re: [PATCH] Memory hot added,The memory can not been added to movable zone

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Message-ID: <55DD58D8.1090508@suse.cz>
Date:	Wed, 26 Aug 2015 08:12:40 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Changsheng Liu <liuchangsheng@...pur.com>,
	Yasuaki Ishimatsu <yasu.isimatu@...il.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	isimatu.yasuaki@...fujitsu.com, linux-mm@...ck.org,
	linux-kernel@...r.kernel.org, yanxiaofeng@...pur.com,
	Changsheng Liu <liuchangcheng@...pur.com>
Subject: Re: [PATCH] Memory hot added,The memory can not been added to movable
 zone

On 26.8.2015 2:36, Changsheng Liu wrote:
> 
> 
> 在 2015/8/25 19:13, Vlastimil Babka 写道:
>> On 08/25/2015 12:25 PM, Changsheng Liu wrote:
>>> Thanks very much for your review, I can move the memory from normal zone
>>> to movable zone succesfully.
>>> And thank you for let me understand the memory mechanism better.
>>> 在 2015/8/25 3:15, Yasuaki Ishimatsu 写道:
>>
>> So you agree to drop the patch from -mm?
>      The system add memory to normal zone defaultly so that it can be 
> used by kernel and then we can not move the memory to movable zone.
>      The patch can add the memory to movable zone directlly.

I thought that you confirmed that the following works?
echo online_movable > /sys/devices/system/memory/memoryXXX/state

If you want it to be the default, there's the node_movable kernel boot option.
Does it work for you?
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