| Message ID | 20220409073846.22286-3-linmiaohe@huawei.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | A few cleanup and fixup patches for migration | expand |
On Sat, Apr 09, 2022 at 03:38:44PM +0800, Miaohe Lin wrote: > When non-lru movable page was freed from under us, __ClearPageMovable must > have been done. Even if it's not done, ClearPageIsolated here won't hurt > as page will be freed anyway. So we can thus remove unneeded lock page and > PageMovable check here. > > Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Looks good: Reviewed-by: Christoph Hellwig <hch@lst.de>
diff --git a/mm/migrate.c b/mm/migrate.c index d8aae6c75990..381963231a62 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -1098,12 +1098,8 @@ static int unmap_and_move(new_page_t get_new_page, /* page was freed from under us. So we are done. */ ClearPageActive(page); ClearPageUnevictable(page); - if (unlikely(__PageMovable(page))) { - lock_page(page); - if (!PageMovable(page)) - ClearPageIsolated(page); - unlock_page(page); - } + if (unlikely(__PageMovable(page))) + ClearPageIsolated(page); goto out; }
When non-lru movable page was freed from under us, __ClearPageMovable must have been done. Even if it's not done, ClearPageIsolated here won't hurt as page will be freed anyway. So we can thus remove unneeded lock page and PageMovable check here. Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> --- mm/migrate.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-)