> When a task jumps into kernel code, CS is 0x10
> When a task is in user mode, CS is 0x23.
> It means that it is already two separate 4Gbytes capable spaces.
Sorry, but you are confusing segments and paging. Segments give you
windows into the *same* linear space. 4G. Paged. Segments don't add a
thing to memory mapping. Yes, it sounds cool - tons of virtual address
space. Not. Unless you are playing with 36-bit space all you can get is a
window into 4G linear address space. To change the mapping you'll need to
flush TLB - it works below segments.
[snip]
> In 386 also: 64Tera bytes address space, 4Gbytes phys space
... and 4G linear space between them. Which kinda kills the whole
idea.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.rutgers.edu
Please read the FAQ at http://www.tux.org/lkml/