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Subject[PATCH v3 11/14] mm/migrate_device: Support COW PTE
Date
Break COW PTE before collecting the pages in COW-ed PTE.

Signed-off-by: Chih-En Lin <shiyn.lin@gmail.com>
---
mm/migrate_device.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 721b2365dbca9..f6d67bd9629f5 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -106,6 +106,8 @@ static int migrate_vma_collect_pmd(pmd_t *pmdp,
}
}

+ if (!break_cow_pte_range(vma, pmdp, start, end))
+ return migrate_vma_collect_skip(start, end, walk);
if (unlikely(pmd_bad(*pmdp)))
return migrate_vma_collect_skip(start, end, walk);

--
2.37.3
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