Con Kolivas wrote:
> I've conducted some of the old fashioned Benno's latency test on this 
> patch in various sysctl configurations. This was done on top of a 
> different tree but everything else was kept static. I have to preface 
> these results by saying I don't really get the 50ms size latencies 
> normally but I'm usually unable to get better than 3ms so I wasn't sure 
> what to expect.
> 
> Only the both preempt off showed any "outlying" results with one spike 
> of ~20ms but the rest of the time being ~3ms. Enabling both forms of 
> preempt seemed to help a little but nothing drastic, and never below 
> 1ms. It was not universal that the latencies were better, but there was 
> a trend towards better latency. I suspect that those who are getting 
> huge latencies may see a bigger change with this patch than I did.
> 
> http://ck.kolivas.org/latency/
> 
> Con


Ooops forgot to mention this was running reiserFS 3.6 on software raid0 
2x IDE with cfq elevator.

Con