>
> @@ -187,6 +221,14 @@ int add_to_swap(struct page *page, struct list_head *list)
> VM_BUG_ON_PAGE(!PageLocked(page), page);
> VM_BUG_ON_PAGE(!PageUptodate(page), page);
>
> + if (unlikely(PageTransHuge(page))) {
> + err = add_to_swap_trans_huge(page, list);
> + if (err < 0)
> + return 0;
> + else if (err > 0)
> + return err;
> + /* fallback to split firstly if return 0 */
switch (err) and add vm event count according to the meaning of err?
> + }
thanks
Hillf
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