On 03/19, qianli zhao wrote: > > I will think about the risks of movement of the decrement of > signal->live before exit_signal(). > If is difficult to judge movement of the decrement of signal->live is > safe,how about only test 'signal->live==1' not use group_dead? > > Such as: > diff --git a/kernel/exit.c b/kernel/exit.c > index 04029e3..87f3595 100644 > --- a/kernel/exit.c > +++ b/kernel/exit.c > @@ -767,6 +767,17 @@ void __noreturn do_exit(long code) > validate_creds_for_do_exit(tsk); > > /* > + * If global init has exited, > + * panic immediately to get a useable coredump. > + */ > + if (unlikely(is_global_init(tsk) && > + ((atomic_read(&tsk->signal->live) == 1) || /*current is > last init thread*/
Just suppose signal->live == 2 and both init's sub-threads exit at the same time. They both can see signal->live == 2, panic() won't be called. Oleg.
