Enable vmspace sharing on SMP. Major changes are,

- %fs register is added to trapframe and saved/restored upon kernel entry/exit.
- Per-cpu pages are no longer mapped at the same virtual address.
- Each cpu now has a separate gdt selector table. A new segment selector
  is added to point to per-cpu pages, per-cpu global variables are now
  accessed through this new selector (%fs). The selectors in gdt table are
  rearranged for cache line optimization.
- fask_vfork is now on as default for both UP and SMP.
- Some aio code cleanup.

Reviewed by:	Alan Cox	<alc@cs.rice.edu>
		John Dyson	<dyson@iquest.net>
		Julian Elischer	<julian@whistel.com>
		Bruce Evans	<bde@zeta.org.au>
		David Greenman	<dg@root.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/i386/include/vm86.h b/sys/i386/include/vm86.h
index 0862f49..a7d565c 100644
--- a/sys/i386/include/vm86.h
+++ b/sys/i386/include/vm86.h
@@ -26,7 +26,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: vm86.h,v 1.8 1998/09/29 09:06:00 bde Exp $
+ *	$Id: vm86.h,v 1.9 1999/03/18 04:37:35 jlemon Exp $
  */
 
 #ifndef _MACHINE_VM86_H_
@@ -49,6 +49,7 @@ typedef union {
 /* layout must match definition of struct trapframe_vm86 in <machine/frame.h> */
 
 struct vm86frame {
+	int	kernel_fs;
 	int	kernel_es;
 	int	kernel_ds;
 	reg86_t	edi;