> The best I can think of is to make changes in or around > get_user_pages(), to steal the pages from userspace and replace them > with non-movable ones before pinning them. The performance cost of > something like this would surely be unacceptable for direct-io, but > maybe OK for the aio ring and futexes.
In the aio case it seems like it could be taught to populate the mapping with non-movable pages to begin with. It's calling get_user_pages() a few lines after instantiating the mapping itself with do_mmap_pgoff(). - z -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
