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SubjectRe: fair clock use in CFS


>
>
> It is possible to do something like this in check_preemption ?
>
> delta = curr->fair_key - first->fair_key;
>
> if (delta > ??? [scale it as you wish] ||
> (curr->key > first->key) && (curr->wait_runtime > ???
> [simple funtion of curr->weight]) )
> preempt
Forgive me, there is typo in the above check. It should be "less than"
since we are controlling negative lags.

(curr->key > first->key) && (curr->wait_runtime < ??? [simple
funtion of curr->weight]) )

>
> A limit control on wait_runtime may prevent a high weight task from
> running for too long, so that others get executed a little earlier.
> Just a thought :-)
>
>
Ting
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