linux-kernel - Re: [patch v2 3/6] mm/memory_hotplug: Disable memory hotremove for 32bit

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Message-ID: <51A212E1.40806@gmail.com>
Date:	Sun, 26 May 2013 21:49:21 +0800
From:	Hush Bensen <hush.bensen@...il.com>
To:	KOSAKI Motohiro <kosaki.motohiro@...il.com>
CC:	Michal Hocko <mhocko@...e.cz>,
	Wanpeng Li <liwanp@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	David Rientjes <rientjes@...gle.com>,
	Jiang Liu <jiang.liu@...wei.com>,
	Tang Chen <tangchen@...fujitsu.com>,
	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org
Subject: Re: [patch v2 3/6] mm/memory_hotplug: Disable memory hotremove for
 32bit

于 2013/5/26 21:06, KOSAKI Motohiro 写道:
> On Sun, May 26, 2013 at 8:45 AM, Hush Bensen <hush.bensen@...il.com> wrote:
>> 于 2013/5/26 19:58, KOSAKI Motohiro 写道:
>>
>>>>> As KOSAKI Motohiro mentioned, memory hotplug don't support 32bit since
>>>>> it was born,
>>>> Why? any reference? This reasoning is really weak.
>>> I have no seen any highmem support in memory hotplug code and I don't
>>> think this
>>> patch fixes all 32bit highmem issue. If anybody are interesting to
>>> support it, it is good thing. But in fact, _now_ it is broken when
>>> enable HIGHMEM.
>>
>> But online/offline memory can work well when enable HIGHMEM, isn't it?
> If you are lucky.
I think it can work well on my x86_32 with highmem enable box.
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