On 25.04.24 10:40, Kefeng Wang wrote:
The page for migrate_device_unmap() already has a reference, so it is
safe to convert the page to folio to save a few calls to compound_head(),
which removes the last isolate_lru_page() call.
Signed-off-by: Kefeng Wang <wangkefeng.wang@xxxxxxxxxx>
---
mm/migrate_device.c | 16 ++++++++--------
1 file changed, 8 insertions(+), 8 deletions(-)
diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index a68616c1965f..423d71ad736a 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -379,33 +379,33 @@ static unsigned long migrate_device_unmap(unsigned long *src_pfns,
continue;
}
+ folio = page_folio(page);
/* ZONE_DEVICE pages are not on LRU */
- if (!is_zone_device_page(page)) {
- if (!PageLRU(page) && allow_drain) {
+ if (!folio_is_zone_device(folio)) {
+ if (!folio_test_lru(folio) && allow_drain) {
/* Drain CPU's lru cache */
lru_add_drain_all();
allow_drain = false;
}
- if (!isolate_lru_page(page)) {
+ if (!folio_isolate_lru(folio)) {
src_pfns[i] &= ~MIGRATE_PFN_MIGRATE;
restore++;
continue;
}
/* Drop the reference we took in collect */
- put_page(page);
+ folio_put(folio);
}
- folio = page_folio(page);
if (folio_mapped(folio))
try_to_migrate(folio, 0);
if (page_mapped(page) ||
folio_mapped(), just as above
--
Cheers,
David / dhildenb
