[PATCH V6 1/4] mm/cma: Add PF flag to force non cma alloc

[Andrea Arcangeli]

On Tue, Jan 08, 2019 at 10:21:07AM +0530, Aneesh Kumar K.V wrote:
> This patch add PF_MEMALLOC_NOCMA which make sure any allocation in that context
> is marked non movable and hence cannot be satisfied by CMA region.
> 
> This is useful with get_user_pages_cma_migrate where we take a page pin by
> migrating pages from CMA region. Marking the section PF_MEMALLOC_NOCMA ensures
> that we avoid uncessary page migration later.
> 
> Suggested-by: Andrea Arcangeli <aarcange at redhat.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>

Reviewed-by: Andrea Arcangeli <aarcange at redhat.com>