diff mbox series

[v4,11/14] mm/migrate_device: Support COW PTE

Message ID 20230207035139.272707-12-shiyn.lin@gmail.com (mailing list archive)
State Superseded
Headers show
Series Introduce Copy-On-Write to Page Table | expand

Commit Message

Chih-En Lin Feb. 7, 2023, 3:51 a.m. UTC 
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 mbox series

Patch

diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 721b2365dbca..2930e591e8fc 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, start, end))
+		return migrate_vma_collect_skip(start, end, walk);
 	if (unlikely(pmd_bad(*pmdp)))
 		return migrate_vma_collect_skip(start, end, walk);