On Mon, Dec 12, 2016 at 10:04:28PM +0530, Aneesh Kumar K.V wrote: > With THP page cache, when trying to build a huge page from regular pte pages, > we just clear the pmd entry. We will take another fault and at that point we > will find the huge page in the radix tree, thereby using the huge page to > complete the page fault > > The second fault path will allocate the needed pgtable_t page for archs like > ppc64. So no need to deposit the same in collapse path. Depositing them in > the collapse path resulting in a pgtable_t memory leak also giving errors like > "[ 2362.021762] BUG: non-zero nr_ptes on freeing mm: 3" > > Fixes:"mm: THP page cache support for ppc64" > > Signed-off-by: Aneesh Kumar K.V <[email protected]>
Acked-by: Kirill A. Shutemov <[email protected]> -- Kirill A. Shutemov
