On Wed 27-03-13 17:29:19, Naoya Horiguchi wrote: > On Wed, Mar 27, 2013 at 03:19:21PM +0100, Michal Hocko wrote: [...] > > If we made sure that all page on the hugepage_freelists have reference > > 0 (which is now not the case and it is yet another source of confusion) > > then the whole loop could be replaced by page_count check. > > I think that free hugepages have refcount 0, You are right. For some reason I totally missed that we drop the reference from page allocator (put_page_testzero in gather_surplus_pages). Sorry about the stupit question. -- Michal Hocko SUSE Labs -- 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>