> *IF* we switched things to do text poking in the upper half of the > address space, we'd probably want to find a completely unused PGD entry. > I'm not sure off the top of my head if we have a good one for that or > if it's worth the trouble. I expect that would be easy on 64-bit (no way the kernel needs all the PGD entries from 256..511) but hard for 32-bit (where kernel address space is in critically short supply on any machine with >1GB RAM). -Tony
