On Sun, Mar 27, 2016 at 10:46:49PM +0300, Kirill A. Shutemov wrote: > The idea is to introduce new type to indicate head page -- > 'struct head_page' -- it's compatible with struct page on memory layout, > but distinct from C point of view. compound_head() should return pointer > of that type. For the proof-of-concept I've introduced new helper -- > compound_head_t(). > Well, it's good for optimizing the specific case of mark_page_accessed(). I'm more worried about the general level of bloat, since the Page* macros are used in so many places. And generating page-flags.h with a script is something to be avoided if at all possible. I wasn't following the discussion around the original page-flags patchset. Can you point me to a discussion of the benefits of the page "policy" checks --- why are they suddenly needed when they weren't before? Or any helpful comments in the code? -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>