we already use the gs register for SMP now..
what about the fs register?
I vaguely remember that the different segments could be used to achieve
this.... (%fs points to user space or something)
julian
On Wed, 7 Jul 1999, Matthew Dillon wrote:
> :Why not put the kernel in a different address space? IIRC there's no
> :absolute requirement for the kernel and userland to be in the same
> :address space, and that way we would have 4 GB for each.
> :
> :Greg
>
> No, the syscall overhead is way too high if we have to mess with MMU
> context. This would work fine on certain cpus with hardware PID support,
> such as the MIPS, but the entire TLB is wiped when you change the mmu
> context on an Intel cpu.
>
> -Matt
> Matthew Dillon
> <[EMAIL PROTECTED]>
>
>
> To Unsubscribe: send mail to [EMAIL PROTECTED]
> with "unsubscribe freebsd-hackers" in the body of the message
>
To Unsubscribe: send mail to [EMAIL PROTECTED]
with "unsubscribe freebsd-hackers" in the body of the message
