On Wednesday 19 November 2008 15:25, Nick Piggin wrote: > For the moment (and previous kernels up to now), I guess you have to > be careful about fork and get_user_pages, unfortunately. I'm reminded by someone wishing to remain anonymous that one of the ways that we can "be careful", is to use MADV_DONTFORK for ranges that may be under direct IO. Not a beautiful solution, but it might work. If you need some sharing of that region between parent and child, you could alternatively use a shared mapping (eg. MAP_ANONYMOUS | MAP_SHARED) and avoid the COW issue completely. -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
