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Subject[PATCH v2] mm/migrate: Continue to migrate for non-hugetlb folios
Date
migrate_hugetlbs returns -ENOMEM when no enough hugetlb,
however there may be free non-hugetlb folios available,
so continue to migrate for non-hugetlb folios.

Nowdays the only negtive return value of migrate_hugetlbs
is -ENOMEM, keep compatible for coming negtive return value
instead of ignore return value.

Signed-off-by: Chen Wandun <chenwandun@huawei.com>

---
v1 --> v2: modify changelog and comment. thanks Huang Ying.
---
mm/migrate.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/migrate.c b/mm/migrate.c
index b971edbf32fc..68927aa06f9b 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1939,7 +1939,8 @@ int migrate_pages(struct list_head *from, new_page_t get_new_page,

rc_gather = migrate_hugetlbs(from, get_new_page, put_new_page, private,
mode, reason, &stats, &ret_folios);
- if (rc_gather < 0)
+ /* There may be free non-hugetlb folios available, continue to migrate. */
+ if (rc_gather < 0 && rc_gather != -ENOMEM)
goto out;
again:
nr_pages = 0;
--
2.25.1
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