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Date: Wed, 20 Feb 2013 10:44:35 +0800
From: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Subject: Re: [PATCH 1/2] mm: hotplug: implement non-movable version of
 get_user_pages() called get_user_pages_non_movable()
Message-ID: <20130220024435.GA30208@hacker.(null)>
Reply-To: Wanpeng Li <liwanp@linux.vnet.ibm.com>
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To: Lin Feng <linfeng@cn.fujitsu.com>
Cc: Mel Gorman <mgorman@suse.de>, Andrew Morton <akpm@linux-foundation.org>, bcrl@kvack.org, viro@zeniv.linux.org.uk, khlebnikov@openvz.org, walken@google.com, kamezawa.hiroyu@jp.fujitsu.com, minchan@kernel.org, riel@redhat.com, rientjes@google.com, isimatu.yasuaki@jp.fujitsu.com, wency@cn.fujitsu.com, laijs@cn.fujitsu.com, jiang.liu@huawei.com, mhocko@suse.cz, linux-mm@kvack.org, linux-aio@kvack.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org

On Wed, Feb 20, 2013 at 10:34:36AM +0800, Lin Feng wrote:
>
>
>On 02/19/2013 09:37 PM, Lin Feng wrote:
>>> > 
>>> > The other is that this almost certainly broken for transhuge page
>>> > handling. gup returns the head and tail pages and ordinarily this is ok
>> I can't find codes doing such things :(, could you please point me out?
>> 
>Sorry, I misunderstood what "tail pages" means, stupid question, just ignore it.
>flee...

According to the compound page, the first page of compound page is
called head page, other sub pages are called tail pages.

Regards,
Wanpeng Li 

>
>thanks,
>linfeng
>
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