> > I think the latency issue was really the fact that we weren't always
> > running softirqs in a timely fashion after they had been disabled by a
> > "disable_bh()". That is fixed with the new softirq stuff, regardless of
> > the other issues.
nope. i observed latency issues with restart + ksoftirqd as well. [when i
first saw these latency problems i basically had ksoftirqd implemented
independently from your patch, and threw the idea away because it was
insufficient from the latency point of view.] Those latencies are harder
to observe because they are not 1/HZ anymore but several hundred millisecs
at most. Plus, like i said previously, pushing IRQ context work into a
scheduler-level context 'feels' incorrect to me - it only makes the
latencies less visible. I'll do some measurements.
Ingo
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This archive was generated by hypermail 2b29 : Tue Jul 31 2001 - 21:00:45 EST