> @@ -909,6 +909,15 @@ int get_hwpoison_page(struct page *page)
> * directly for tail pages.
> */
> if (PageTransHuge(head)) {
> + /*
> + * Non anonymous thp exists only in allocation/free time. We
> + * can't handle such a case correctly, so let's give it up.
> + * This should be better than triggering BUG_ON when kernel
> + * tries to touch a "partially handled" page.
> + */
> + if (!PageAnon(head))
> + return 0;
Please print a message for this case. In the future there will be
likely more non anonymous THP pages from Kirill's large page cache work
(so eventually we'll need it)
-Andi
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