Restrictions for lock coarsening?

[Christian Thalinger]

On Tue, 2009-01-06 at 15:27 -0800, Tom Rodriguez wrote:
> It's been a while for me too so my answers aren't the final word but I  
> don't think there's any implementation reason why a previously  
> unbiasable object couldn't be converted back to a biasable one.  I  
> think it's mainly a matter of policy and performance.  The better  
> solution would be to remove the startup delay all together but I don't  
> think anyone has a good idea one what it would take to do that.  The  
> original decision was motivated by not allowing any regression, not  
> matter how small, in the startup benchmarks.  It's possible it's not a  
> big deal now but I don't think anyone has done the investigation to  
> know one way or another.

Have there been any regressions back then?  Or was the delay added
conservatively?

- Christian