Re: [PATCHv5 16/28] mm, thp: remove compound_lock

From: Kirill A. Shutemov
Date: Thu Apr 30 2015 - 07:58:58 EST


On Wed, Apr 29, 2015 at 06:11:08PM +0200, Jerome Marchand wrote:
> On 04/23/2015 11:03 PM, Kirill A. Shutemov wrote:
> > We are going to use migration entries to stabilize page counts. It means
>
> By "stabilize" do you mean "protect" from concurrent access? I've seen
> that you use the same term in seemingly the same sense several times (at
> least in patches 15, 16, 23, 24 and 28).

Here it's protect from concurrent change of page's ->_count or
->_mapcount.

In some context I could you "stabilize" as "protect from concurrent
split".
--
Kirill A. Shutemov
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