- Convert all uses of pmap_pte and get_ptbase to pmap_pte_quick. When

  accessing an alternate address space this causes 1 page table page at
  a time to be mapped in, rather than using the recursive mapping technique
  to map in an entire alternate address space.  The recursive mapping
  technique changes large portions of the address space and requires global
  tlb flushes, which seem to cause problems when PAE is enabled.  This will
  also allow IPIs to be avoided when mapping in new page table pages using
  the same technique as is used for pmap_copy_page and pmap_zero_page.

Sponsored by:	DARPA, Network Associates Laboratories

1 files changed, 3 insertions, 3 deletions

diff --git a/sys/amd64/amd64/db_interface.c b/sys/amd64/amd64/db_interface.c
index e2b936b..a26a555 100644
--- a/sys/amd64/amd64/db_interface.c
+++ b/sys/amd64/amd64/db_interface.c
@@ -262,7 +262,7 @@ db_write_bytes(vm_offset_t addr, size_t size, char *data)
 	if (addr > trunc_page((vm_offset_t)btext) - size &&
 	    addr < round_page((vm_offset_t)etext)) {
 
-	    ptep0 = pmap_pte(kernel_pmap, addr);
+	    ptep0 = pmap_pte_quick(kernel_pmap, addr);
 	    oldmap0 = *ptep0;
 	    *ptep0 |= PG_RW;
 
@@ -270,14 +270,14 @@ db_write_bytes(vm_offset_t addr, size_t size, char *data)
 	    if ((*ptep0 & PG_PS) == 0) {
 	    	addr1 = trunc_page(addr + size - 1);
 	    	if (trunc_page(addr) != addr1) {
-		    ptep1 = pmap_pte(kernel_pmap, addr1);
+		    ptep1 = pmap_pte_quick(kernel_pmap, addr1);
 		    oldmap1 = *ptep1;
 		    *ptep1 |= PG_RW;
 	    	}
 	    } else {
 		addr1 = trunc_4mpage(addr + size - 1);
 		if (trunc_4mpage(addr) != addr1) {
-		    ptep1 = pmap_pte(kernel_pmap, addr1);
+		    ptep1 = pmap_pte_quick(kernel_pmap, addr1);
 		    oldmap1 = *ptep1;
 		    *ptep1 |= PG_RW;
 		}