On Fri, May 01, 2020 at 11:04:49PM +0100, Al Viro wrote: > Long story - basically, it's been a source of massive headache too many times. > No formal project, but there are several people (me, Arnd, Christoph) who'd > been reducing its use. For more than a decade now, I think... > > FWIW, I doubt that it will be entirely killable; Christoph appears to be > more optimistic. In any case, its use has been greatly reduced and having > it narrowed down to even fewer places would be a good thing. > > In the same direction: use_mm()/unuse_mm() regularization wrt set_fs(), getting > rid of it in coredump code, some movements towards killing ioctl_by_bdev(); > not sure if I've spotted everything - Christoph? That's the big current projects out in the wild. I have a few more growing.