Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

pmap_zero_page, pmap_copy_page, pmap_pageidlezero:

Browse Source 
preset PG_M and PG_U where appropriate to eliminate pte writebacks.
from freebsd.
This commit is contained in:
yamt 2004-10-10 09:53:23 +00:00
parent 83d9ffa7e6
commit 8e520446c5
1 changed files with 6 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
sys/arch/i386/i386/pmap.c
View File

@ -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 @@ pmap_zero_page(pa)
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 @@ pmap_pageidlezero(pa)
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 @@ pmap_copy_page(srcpa, dstpa)
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