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vm_contig.c (156224) vm_contig.c (156225)
1/*-
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
7 *
8 * Redistribution and use in source and binary forms, with or without

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55 * Carnegie Mellon University
56 * Pittsburgh PA 15213-3890
57 *
58 * any improvements or extensions that they make and grant Carnegie the
59 * rights to redistribute these changes.
60 */
61
62#include <sys/cdefs.h>
1/*-
2 * Copyright (c) 1991 Regents of the University of California.
3 * All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
7 *
8 * Redistribution and use in source and binary forms, with or without

--- 46 unchanged lines hidden (view full) ---

55 * Carnegie Mellon University
56 * Pittsburgh PA 15213-3890
57 *
58 * any improvements or extensions that they make and grant Carnegie the
59 * rights to redistribute these changes.
60 */
61
62#include <sys/cdefs.h>
63__FBSDID("$FreeBSD: head/sys/vm/vm_contig.c 156224 2006-03-02 21:38:38Z tegge $");
63__FBSDID("$FreeBSD: head/sys/vm/vm_contig.c 156225 2006-03-02 22:13:28Z tegge $");
64
65#include <sys/param.h>
66#include <sys/systm.h>
67#include <sys/lock.h>
68#include <sys/malloc.h>
69#include <sys/mutex.h>
70#include <sys/proc.h>
71#include <sys/kernel.h>

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86#include <vm/vm_extern.h>
87
88static int
89vm_contig_launder_page(vm_page_t m)
90{
91 vm_object_t object;
92 vm_page_t m_tmp;
93 struct vnode *vp;
64
65#include <sys/param.h>
66#include <sys/systm.h>
67#include <sys/lock.h>
68#include <sys/malloc.h>
69#include <sys/mutex.h>
70#include <sys/proc.h>
71#include <sys/kernel.h>

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86#include <vm/vm_extern.h>
87
88static int
89vm_contig_launder_page(vm_page_t m)
90{
91 vm_object_t object;
92 vm_page_t m_tmp;
93 struct vnode *vp;
94 struct mount *mp;
94
95 object = m->object;
96 if (!VM_OBJECT_TRYLOCK(object))
97 return (EAGAIN);
98 if (vm_page_sleep_if_busy(m, TRUE, "vpctw0")) {
99 VM_OBJECT_UNLOCK(object);
100 vm_page_lock_queues();
101 return (EBUSY);
102 }
103 vm_page_test_dirty(m);
104 if (m->dirty == 0 && m->hold_count == 0)
105 pmap_remove_all(m);
106 if (m->dirty) {
107 if (object->type == OBJT_VNODE) {
108 vm_page_unlock_queues();
109 vp = object->handle;
110 vm_object_reference_locked(object);
111 VM_OBJECT_UNLOCK(object);
95
96 object = m->object;
97 if (!VM_OBJECT_TRYLOCK(object))
98 return (EAGAIN);
99 if (vm_page_sleep_if_busy(m, TRUE, "vpctw0")) {
100 VM_OBJECT_UNLOCK(object);
101 vm_page_lock_queues();
102 return (EBUSY);
103 }
104 vm_page_test_dirty(m);
105 if (m->dirty == 0 && m->hold_count == 0)
106 pmap_remove_all(m);
107 if (m->dirty) {
108 if (object->type == OBJT_VNODE) {
109 vm_page_unlock_queues();
110 vp = object->handle;
111 vm_object_reference_locked(object);
112 VM_OBJECT_UNLOCK(object);
113 (void) vn_start_write(vp, &mp, V_WAIT);
112 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
113 VM_OBJECT_LOCK(object);
114 vm_object_page_clean(object, 0, 0, OBJPC_SYNC);
115 VM_OBJECT_UNLOCK(object);
116 VOP_UNLOCK(vp, 0, curthread);
117 vm_object_deallocate(object);
114 vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, curthread);
115 VM_OBJECT_LOCK(object);
116 vm_object_page_clean(object, 0, 0, OBJPC_SYNC);
117 VM_OBJECT_UNLOCK(object);
118 VOP_UNLOCK(vp, 0, curthread);
119 vm_object_deallocate(object);
120 vn_finished_write(mp);
118 vm_page_lock_queues();
119 return (0);
120 } else if (object->type == OBJT_SWAP ||
121 object->type == OBJT_DEFAULT) {
122 m_tmp = m;
123 vm_pageout_flush(&m_tmp, 1, VM_PAGER_PUT_SYNC);
124 VM_OBJECT_UNLOCK(object);
125 return (0);

--- 484 unchanged lines hidden --- 		121 vm_page_lock_queues();
122 return (0);
123 } else if (object->type == OBJT_SWAP ||
124 object->type == OBJT_DEFAULT) {
125 m_tmp = m;
126 vm_pageout_flush(&m_tmp, 1, VM_PAGER_PUT_SYNC);
127 VM_OBJECT_UNLOCK(object);
128 return (0);

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