The default kernel (Dark Core) is derived from the Voodoo kernels, but the lagfix is disabled by default. For example, the v9.5 description on XDA has the following note:
New Kernel >> Dark Core v1.0 inside! I9000, I9000M, I9000T ONLY (Cappy users choose speedmod or skip kernel)
Customized and built by ficeto [Team Darky Dev Crew]
Based on supercurioxe2x80x99s latest voodoo sound 6, lagfix and color - thanks a ton, Mr. Supercurio
If you install on top of a kernel with Voodoo enabled already then you should be fine (and I don't believe it will disable it, but you can re-enable if it does). There are a handful of threads on the Darky forums that talk about some of the nuances to this, but here are a couple:
- The Quick Start Guide - Recurrent Questions (The "Recommendations prior to flashing a ROM" section talks about lagfixes).
- activate lagfix in 9.2?
- What is a lagfix and how to enable or disable it (This one is kind of goofy but still helpful)