> Many years ago, we created an application that would attach a R/W DCSS > to use for extra memory. As the demands for more memory increased, > subsequent DCSS space would be attached. We used to attach existing DCSS > space (such as VTAM) for testing (no, this would no trash the real VTAM > segment, we'd just ATTACH the DCSS in R/W mode, thus extending our virtual > machine storage dynamically). I was wondering if Linux on 390 could be > taught how to do this. Can Linux on 390 handle "holes" in it's address > space?
The way Linux handles DCSS now, you have to tell it to establish page tables for the highest address you expect to use, covering all DCSSs. So ... yes, it handles "holes" in its address space. (More than that you'll have to get from the IBMers.) -- R;
