Hello Mike, On Mon, Apr 03, 2017 at 06:10:24PM +0300, Mike Rapoport wrote: > Actually, I've found these details in /proc useful when I was experimenting > with checkpoint-restore of an application that uses userfaultfd. With > interface in /proc/<pid>/ we know exactly which process use userfaultfd and > can act appropriately. You've to be somewhat serialized by other means though, because "exactly" has a limit with fdinfo. For example by the time read() returns, the uffd may have been closed already by the app (just the uffd isn't ->release()d yet as the last fput has yet to run, the fdinfo runs the last fput in such case). As long as you can cope with this and you've a stable fdinfo it's ok. -- 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>
