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

[Jeff Garzik]

Linus Torvalds wrote:
> On Mon, 9 Apr 2007, Andrew Morton wrote:
> > >    10 ?        S<     0:00 [khelper]
> > That one's needed to parent the call_usermodehelper() apps.  I don't think
> > it does anything else.  We used to use keventd for this but that had some
> > problem whcih I forget.
>
> I think it was one of a long series of deadlocks. 
>
> Using a "keventd" for many different things sounds clever and nice, but 
> then sucks horribly when one event triggers another event, and they depend 
> on each other. Solution: use independent threads for the events.

Nod.  That's the key problem with keventd.  Independent things must wait 
on each other.

That's why I feel thread creation -- cheap under Linux -- is quite 
appropriate for many of these situations.

	Jeff



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