On Mon, 11 Feb 2019, Dan Williams wrote: > An mmap write after a fault due to a hole punch is free to trigger > SIGBUS if the subsequent page allocation fails. So no, I don't see > them as the same unless you're allowing for the holder of the MR to > receive a re-fault failure. Order 0 page allocation failures are generally not possible in that path. System will reclaim and OOM before that happens.
