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vm_pageout.c (7090) vm_pageout.c (7424)
1/*
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 * Copyright (c) 1994 David Greenman
7 * All rights reserved.
8 *

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60 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
61 * School of Computer Science
62 * Carnegie Mellon University
63 * Pittsburgh PA 15213-3890
64 *
65 * any improvements or extensions that they make and grant Carnegie the
66 * rights to redistribute these changes.
67 *
1/*
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 * Copyright (c) 1994 John S. Dyson
5 * All rights reserved.
6 * Copyright (c) 1994 David Greenman
7 * All rights reserved.
8 *

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60 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
61 * School of Computer Science
62 * Carnegie Mellon University
63 * Pittsburgh PA 15213-3890
64 *
65 * any improvements or extensions that they make and grant Carnegie the
66 * rights to redistribute these changes.
67 *
68 * $Id: vm_pageout.c,v 1.41 1995/03/12 07:58:29 davidg Exp $
68 * $Id: vm_pageout.c,v 1.42 1995/03/16 18:17:28 bde Exp $
69 */
70
71/*
72 * The proverbial page-out daemon.
73 */
74
75#include <sys/param.h>
76#include <sys/systm.h>

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567 continue;
568 }
569 vm_page_test_dirty(m);
570
571 if ((m->dirty & m->valid) == 0) {
572 if (m->valid == 0) {
573 pmap_page_protect(VM_PAGE_TO_PHYS(m), VM_PROT_NONE);
574 vm_page_free(m);
69 */
70
71/*
72 * The proverbial page-out daemon.
73 */
74
75#include <sys/param.h>
76#include <sys/systm.h>

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567 continue;
568 }
569 vm_page_test_dirty(m);
570
571 if ((m->dirty & m->valid) == 0) {
572 if (m->valid == 0) {
573 pmap_page_protect(VM_PAGE_TO_PHYS(m), VM_PROT_NONE);
574 vm_page_free(m);
575 cnt.v_dfree++;
575 } else {
576 vm_page_cache(m);
577 }
578 } else if (maxlaunder > 0) {
579 int written;
580
581 object = m->object;
582 if ((object->flags & OBJ_DEAD) || !vm_object_lock_try(object)) {

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688 * We try to maintain some *really* free pages, this allows interrupt
689 * code to be guaranteed space.
690 */
691 while (cnt.v_free_count < cnt.v_free_reserved) {
692 m = vm_page_queue_cache.tqh_first;
693 if (!m)
694 break;
695 vm_page_free(m);
576 } else {
577 vm_page_cache(m);
578 }
579 } else if (maxlaunder > 0) {
580 int written;
581
582 object = m->object;
583 if ((object->flags & OBJ_DEAD) || !vm_object_lock_try(object)) {

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689 * We try to maintain some *really* free pages, this allows interrupt
690 * code to be guaranteed space.
691 */
692 while (cnt.v_free_count < cnt.v_free_reserved) {
693 m = vm_page_queue_cache.tqh_first;
694 if (!m)
695 break;
696 vm_page_free(m);
697 cnt.v_dfree++;
696 }
697
698 /*
699 * make sure that we have swap space -- if we are low on memory and
700 * swap -- then kill the biggest process.
701 */
702 if ((vm_swap_size == 0 || swap_pager_full) &&
703 ((cnt.v_free_count + cnt.v_cache_count) < cnt.v_free_min)) {

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699
700 /*
701 * make sure that we have swap space -- if we are low on memory and
702 * swap -- then kill the biggest process.
703 */
704 if ((vm_swap_size == 0 || swap_pager_full) &&
705 ((cnt.v_free_count + cnt.v_cache_count) < cnt.v_free_min)) {

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