Split page tables

[Bahadir Balban]

Hello,

If split page tables were used in v6/v7, there might have been 
significant page table area savings e.g. 8KB * 256 = 2MB on a 256 
address space system with a 2GB task address space. This also seems to 
bring the relief of not having to map global mappings to every page 
table at run-time. Why wasn't this route chosen? Perhaps because it 
needs the TASK_SIZE to become smaller? Whatif it was made 0x8000 0000?

Thanks,

Bahadir