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Date: Mon, 2 Mar 2015 15:10:23 -0800
From: Andrew Morton <akpm@linux-foundation.org>
To: Mike Kravetz <mike.kravetz@oracle.com>
Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org,
        Nadia Yvette Chambers <nyc@holomorphy.com>,
        Davidlohr Bueso <davidlohr@hp.com>,
        Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com>,
        Joonsoo Kim <iamjoonsoo.kim@lge.com>
Subject: Re: [RFC 2/3] hugetlbfs: coordinate global and subpool reserve
 accounting
Message-Id: <20150302151023.e40dd1c6a9bf3d29cb6b657c@linux-foundation.org>
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	<1425077893-18366-4-git-send-email-mike.kravetz@oracle.com>
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On Fri, 27 Feb 2015 14:58:11 -0800 Mike Kravetz <mike.kravetz@oracle.com> wrote:

> If the pages for a subpool are reserved, then the reservations have
> already been accounted for in the global pool.  Therefore, when
> requesting a new reservation (such as for a mapping) for the subpool
> do not count again in global pool.  However, when actually allocating
> a page for the subpool decrement global reserve count to correspond to
> with decrement in global free pages.

The last sentence made my brain hurt.