Hi On Tue, Apr 22, 2014 at 2:44 PM, Florian Weimer <fweimer@xxxxxxxxxx> wrote: > I didn't find that very convincing. But in v2, seals are monotonic, so > checking them should be reliable enough. Ok. > What happens when you create a loop device on a write-sealed descriptor? Any write-back to the loop-device will fail with EPERM as soon as the fd gets write-sealed. See __do_lo_send_write() in drivers/block/loop.c. It's up to the loop-device to forward the error via bio_endio() to the caller for proper error-handling. Thanks David -- 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>