From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Sun, 26 May 2013 21:49:21 +0800
From: Hush Bensen <hush.bensen@gmail.com>
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To: KOSAKI Motohiro <kosaki.motohiro@gmail.com>
CC: Michal Hocko <mhocko@suse.cz>,
	Wanpeng Li <liwanp@linux.vnet.ibm.com>,
	Andrew Morton <akpm@linux-foundation.org>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
	David Rientjes <rientjes@google.com>,
	Jiang Liu <jiang.liu@huawei.com>,
	Tang Chen <tangchen@cn.fujitsu.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org
Subject: Re: [patch v2 3/6] mm/memory_hotplug: Disable memory hotremove for
 32bit
References: <1369547921-24264-1-git-send-email-liwanp@linux.vnet.ibm.com> <1369547921-24264-3-git-send-email-liwanp@linux.vnet.ibm.com> <20130526090054.GE10651@dhcp22.suse.cz> <CAHGf_=otK_LNgd6S09Fjjo0PfTSF3X0kj+=kGNyaTAze7m-b8w@mail.gmail.com> <51A203D4.6080001@gmail.com> <CAHGf_=pTEvunQ6fJQZ0MGwGmT31LryGmmfRUgC5T3AMzXQmx2w@mail.gmail.com>
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于 2013/5/26 21:06, KOSAKI Motohiro 写道:
> On Sun, May 26, 2013 at 8:45 AM, Hush Bensen <hush.bensen@gmail.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.