On Thu, 10 Dec 2015 19:21:43 -0800 Andy Lutomirski <luto@xxxxxxxxxx> wrote: > The x86 vvar mapping contains pages with differing cacheability > flags. This is currently only supported using (io_)remap_pfn_range, > but those functions can't be used inside page faults. Foggy. What does "support" mean here? > Add vm_insert_pfn_prot to support varying cacheability within the > same non-COW VMA in a more sane manner. Here, "support" presumably means "insertion of pfns". Can we spell all this out more completely please? > x86 needs this to avoid a CRIU-breaking and memory-wasting explosion > of VMAs when supporting userspace access to the HPET. > OtherwiseAck. -- 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>