[src/trunk]: src/sys/arch/i386/i386 pmap_zero_page, pmap_copy_page, pmap_page...

[yamt <yamt%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b87f7dc4915d
branches:  trunk
changeset: 570420:b87f7dc4915d
user:      yamt <yamt%NetBSD.org@localhost>
date:      Sun Oct 10 09:53:23 2004 +0000

description:
pmap_zero_page, pmap_copy_page, pmap_pageidlezero:
preset PG_M and PG_U where appropriate to eliminate pte writebacks.
from freebsd.

diffstat:

 sys/arch/i386/i386/pmap.c |  12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)

diffs (47 lines):

diff -r 2ace1ed6050e -r b87f7dc4915d sys/arch/i386/i386/pmap.c
--- a/sys/arch/i386/i386/pmap.c Sun Oct 10 09:52:29 2004 +0000
+++ b/sys/arch/i386/i386/pmap.c Sun Oct 10 09:53:23 2004 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: pmap.c,v 1.175 2004/10/10 09:52:29 yamt Exp $  */
+/*     $NetBSD: pmap.c,v 1.176 2004/10/10 09:53:23 yamt Exp $  */
 
 /*
  *
@@ -60,7 +60,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.175 2004/10/10 09:52:29 yamt Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.176 2004/10/10 09:53:23 yamt Exp $");
 
 #include "opt_cputype.h"
 #include "opt_user_ldt.h"
@@ -2273,7 +2273,7 @@
                panic("pmap_zero_page: lock botch");
 #endif
 
-       *zpte = (pa & PG_FRAME) | PG_V | PG_RW;         /* map in */
+       *zpte = (pa & PG_FRAME) | PG_V | PG_RW | PG_M | PG_U; /* map in */
        pmap_update_pg((vaddr_t)zerova);                /* flush TLB */
 
        memset(zerova, 0, PAGE_SIZE);                   /* zero */
@@ -2304,7 +2304,7 @@
        if (*zpte)
                panic("pmap_zero_page_uncached: lock botch");
 #endif
-       *zpte = (pa & PG_FRAME) | PG_V | PG_RW;         /* map in */
+       *zpte = (pa & PG_FRAME) | PG_V | PG_RW | PG_M | PG_U; /* map in */
        pmap_update_pg((vaddr_t)zerova);                /* flush TLB */
        for (i = 0, ptr = (int *) zerova; i < PAGE_SIZE / sizeof(int); i++) {
                if (sched_whichqs != 0) {
@@ -2349,8 +2349,8 @@
                panic("pmap_copy_page: lock botch");
 #endif
 
-       *spte = (srcpa & PG_FRAME) | PG_V | PG_RW;
-       *dpte = (dstpa & PG_FRAME) | PG_V | PG_RW;
+       *spte = (srcpa & PG_FRAME) | PG_V | PG_RW | PG_U;
+       *dpte = (dstpa & PG_FRAME) | PG_V | PG_RW | PG_M | PG_U;
        pmap_update_2pg((vaddr_t)csrcva, (vaddr_t)cdstva);
        memcpy(cdstva, csrcva, PAGE_SIZE);
 #ifdef DIAGNOSTIC