On Thu, Dec 03, 2020 at 02:30:46AM +0000, Pavel Begunkov wrote: > Handle task works and lock it earlier before it starts killing off > task's resources like mm. io_uring makes use of it a lot and it'd > nicer to have all added task_work finding tasks in a consistent state. > > Signed-off-by: Pavel Begunkov <asml.sile...@gmail.com> > --- > > Would it be correct? I clearly don't know all the exit invariants, but > can't find any users relying on task_works in-between.
You've just gotten rid of exit_task_work() anywhere after exit_files(). And exit_mm() can trigger the final fput() just as easily as exit_files(). IOW, you have just made the effect of final close on exit() completely asynchronous. NAK.