AeroMan wrote:
Besides this, you need to load the MMU tables every task switch. This may be a big memory area, that´s why a slow down was mentioned.
Blitter and Disk DMA are also a problem, as they don´t pass through the MMU. But this applies only to the original hardware
(I have some crazy ideas about MMUs, but this is way off-topic... :-D )
Shouldn't Blitter and Disk DMA be handled by the kernel anyway? I've seen this remark (blitter & DMA etc.) several times when discussing memory protection in this forum, but I'm under the impression that this is not catered for on other platforms either, since such stuff is not part of any user process anyway.
