linux-kernel - Re: [PATCH v3 2/3] mm/hugetlb: compute/return the number of regions added by region

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Message-ID: <20150529014839.GA2986@hori1.linux.bs1.fc.nec.co.jp>
Date:	Fri, 29 May 2015 01:48:40 +0000
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Mike Kravetz <mike.kravetz@...cle.com>
CC:	"linux-mm@...ck.org" <linux-mm@...ck.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Davidlohr Bueso <dave@...olabs.net>,
	"David Rientjes" <rientjes@...gle.com>,
	Luiz Capitulino <lcapitulino@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH v3 2/3] mm/hugetlb: compute/return the number of regions
 added by region_add()

On Wed, May 27, 2015 at 10:56:10AM -0700, Mike Kravetz wrote:
> Modify region_add() to keep track of regions(pages) added to the
> reserve map and return this value.  The return value can be
> compared to the return value of region_chg() to determine if the
> map was modified between calls.
> 
> Make vma_commit_reservation() also pass along the return value of
> region_add().  In the normal case, we want vma_commit_reservation
> to return the same value as the preceding call to vma_needs_reservation.
> Create a common __vma_reservation_common routine to help keep the
> special case return values in sync
> 
> Signed-off-by: Mike Kravetz <mike.kravetz@...cle.com>

Reviewed-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>--
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