https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83653
--- Comment #12 from Aldy Hernandez <aldyh at gcc dot gnu.org> --- (In reply to Matthew Wilcox from comment #9) > Maybe I'm a little slow, but I don't see what the path is that sets 'nr' to > 0. It's 1UL << compound_order. Typically, compound_order is 0, although it > may be anything up to log2(number of pages in the machine). Are you saying Sorry, yes 1<<0 will be 1, which is handled. Let me dig into the threading.
