* Lee Revell <[email protected]> wrote:
> I captured this 3+ ms latency trace when killing a process with a few
> thousand threads. Can a cond_resched be added to this code path?
> bash-17992 0.n.1 29us : eligible_child (do_wait)
>
> [ 3000+ of these deleted ]
>
> bash-17992 0.n.1 3296us : eligible_child (do_wait)
Atomicity of signal delivery is pretty much a must, so i'm not sure this
particular latency can be fixed, short of running PREEMPT_RT. Paul E.
McKenney is doing some excellent stuff by RCU-ifying the task lookup and
signal code, but i'm not sure whether it could cover do_wait().
Ingo
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