Re: [PATCH v3 2/3] mm/hugetlb: compute/return the number of regions added by region_add()

[Naoya Horiguchi]

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@xxxxxxxxxx>

Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>--
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