On Thu, Feb 02, 2017 at 09:51:25AM +0000, Al Viro wrote: > * fuse_copy_fill(). I'm not at all sure that iov_iter_get_pages() > is a good idea there - fuse_copy_do() could bloody well just use > copy_{to,from}_iter(). Miklos, could you explain why does lock_request() prohibit page faults until the matching unlock_request()? All it does is setting FR_LOCKED on our request and the only thing that even looks at that is fuse_abort_conn(), which doesn't (AFAICS) wait for anything. Where does the deadlock come from, and if it's not a deadlock - what is it? Or is that comment stale since "fuse: simplify request abort"?