Message-ID: <50B48D7C.3070706@zytor.com>
Date: Tue, 27 Nov 2012 01:53:00 -0800
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Wen Congyang <wency@cn.fujitsu.com>
CC: Tang Chen <tangchen@cn.fujitsu.com>, Bob Liu <lliubbo@gmail.com>,
        akpm@linux-foundation.org, rob@landley.net,
        isimatu.yasuaki@jp.fujitsu.com, laijs@cn.fujitsu.com,
        linfeng@cn.fujitsu.com, jiang.liu@huawei.com, yinghai@kernel.org,
        kosaki.motohiro@jp.fujitsu.com, minchan.kim@gmail.com, mgorman@suse.de,
        rientjes@google.com, rusty@rustcorp.com.au,
        linux-kernel@vger.kernel.org, linux-mm@kvack.org,
        linux-doc@vger.kernel.org, "Rafael J. Wysocki" <rjw@sisk.pl>
Subject: Re: [PATCH v2 0/5] Add movablecore_map boot option
References: <1353667445-7593-1-git-send-email-tangchen@cn.fujitsu.com> <CAA_GA1d7CxHvmZELvD_DO6u5tu1WBqfmLiuEzeFo=xMzuW50Tg@mail.gmail.com> <50B479FA.6010307@cn.fujitsu.com> <50B47EB7.20000@zytor.com> <50B48C3B.8080408@cn.fujitsu.com>
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On 11/27/2012 01:47 AM, Wen Congyang wrote:
> At 11/27/2012 04:49 PM, H. Peter Anvin Wrote:
>> On 11/27/2012 12:29 AM, Tang Chen wrote:
>>> Another approach is like the following:
>>> movable_node = 1,3-5,8
>>> This could set all the memory on the nodes to be movable. And the rest
>>> of memory works as usual. But movablecore_map is more flexible.
>>
>> ... but *much* harder for users, so movable_node is better in most cases.
>
> But numa is initialized very later, and we need the information in SRAT...
>
> Thanks
> Wen Congyang
>

I think you need to deal with it for usability reasons, though...


-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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