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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