> Both are real page. But why do you expect pages to be 64-byte alinged? > Both are aligned to 64-bit as they suppose to be IIUC.
On a 64-bit kernel sizeof struct page == 64 (after much work by people to trim out excess stuff). So I thought we made sure to align the base address of blocks of "struct page" so that every one neatly fits into one cache line. -Tony
