[PATCH 0/1] (Was: kernel: move exit_task_work() past exit_notify())

[Oleg Nesterov <oleg@redhat.com>]

On 04/13, Oleg Nesterov wrote:
>
> > --- a/kernel/exit.c
> > +++ b/kernel/exit.c
> > @@ -795,7 +795,6 @@ void do_exit(long code)
> >  	exit_shm(tsk);
> >  	exit_files(tsk);
> >  	exit_fs(tsk);
> > -	exit_task_work(tsk);
> >  	check_stack_usage();
> >  	exit_thread();
> >
> > @@ -822,6 +821,7 @@ void do_exit(long code)
> >  	ptrace_put_breakpoints(tsk);
> >
> >  	exit_notify(tsk, group_dead);
> > +	exit_task_work(tsk);
>
> I am not comfortable with this change...
>
> The task is "really dead" after exit_notify(), even release_task(current)
> can be called.
>
> Let me think a bit... It seems that we have the alternative.

Andrey, Eric, how about this patch?

COMPLETELY UNTESTED and I need to recheck, but perhaps you can review?

Oleg.