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

Eric W. Biederman
2007-04-06T18:31:20Z

Ingo Molnar <mingo@elte.hu> writes:

> 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.

And what pray tell except for heuristics is the list of children used for?

I could find a use in the scheduler (oldest_child and younger/older_sibling).
I could find a use in mm/oom_kill.

I could find a use in irixsig where it roles it's own version of wait4.

Perhaps I was blind but that was about it.

I didn't see the child list implementing any semantics we really care
about to user space.

Eric