[PATCH v3 1/6] mm/gup: don't pin migrated cma pages in movable zone

From: Pavel Tatashin
Date: Fri Dec 11 2020 - 15:23:54 EST


In order not to fragment CMA the pinned pages are migrated. However,
they are migrated to ZONE_MOVABLE, which also should not have pinned pages.

Remove __GFP_MOVABLE, so pages can be migrated to zones where pinning
is allowed.

Signed-off-by: Pavel Tatashin <pasha.tatashin@xxxxxxxxxx>
Reviewed-by: David Hildenbrand <david@xxxxxxxxxx>
Reviewed-by: John Hubbard <jhubbard@xxxxxxxxxx>
Acked-by: Michal Hocko <mhocko@xxxxxxxx>
---
mm/gup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/gup.c b/mm/gup.c
index 0c866af5d96f..87452fcad048 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1565,7 +1565,7 @@ static long check_and_migrate_cma_pages(struct mm_struct *mm,
long ret = nr_pages;
struct migration_target_control mtc = {
.nid = NUMA_NO_NODE,
- .gfp_mask = GFP_USER | __GFP_MOVABLE | __GFP_NOWARN,
+ .gfp_mask = GFP_USER | __GFP_NOWARN,
};

check_again:
--
2.25.1