Re: init's children list is long and slows reaping children.

Ingo Molnar
2007-04-06T17:33:05Z

* Oleg Nesterov <oleg@tv-sign.ru> wrote:

> > Thinking about it I do agree with Linus that two lists sounds like
> > the right solution because it ensures we always have O(1) time when
> > waiting for a zombie.
>
> Well. I bet this will be painful, and will uglify the code even more.
>
> do_wait() has to iterate over 2 lists, __ptrace_unlink() should check
> ->exit_state, etc...

no. Two _completely separate_ lists.

i.e. a to-be-reaped task will still be on the main list _too_. The main
list is for all the PID semantics rules. The reap-list is just for
wait4() processing. The two would be completely separate.

Ingo