vm_unix.c (116226) | vm_unix.c (118771) |
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1/* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 31 unchanged lines hidden (view full) --- 40 * @(#)vm_unix.c 8.1 (Berkeley) 6/11/93 41 */ 42 43/* 44 * Traditional sbrk/grow interface to VM 45 */ 46 47#include <sys/cdefs.h> | 1/* 2 * Copyright (c) 1988 University of Utah. 3 * Copyright (c) 1991, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Systems Programming Group of the University of Utah Computer 8 * Science Department. --- 31 unchanged lines hidden (view full) --- 40 * @(#)vm_unix.c 8.1 (Berkeley) 6/11/93 41 */ 42 43/* 44 * Traditional sbrk/grow interface to VM 45 */ 46 47#include <sys/cdefs.h> |
48__FBSDID("$FreeBSD: head/sys/vm/vm_unix.c 116226 2003-06-11 23:50:51Z obrien $"); | 48__FBSDID("$FreeBSD: head/sys/vm/vm_unix.c 118771 2003-08-11 07:14:08Z bms $"); |
49 50#include <sys/param.h> 51#include <sys/lock.h> 52#include <sys/mutex.h> 53#include <sys/proc.h> 54#include <sys/resourcevar.h> 55#include <sys/sysproto.h> 56#include <sys/systm.h> --- 17 unchanged lines hidden (view full) --- 74obreak(td, uap) 75 struct thread *td; 76 struct obreak_args *uap; 77{ 78 struct vmspace *vm = td->td_proc->p_vmspace; 79 vm_offset_t new, old, base; 80 int rv; 81 int error = 0; | 49 50#include <sys/param.h> 51#include <sys/lock.h> 52#include <sys/mutex.h> 53#include <sys/proc.h> 54#include <sys/resourcevar.h> 55#include <sys/sysproto.h> 56#include <sys/systm.h> --- 17 unchanged lines hidden (view full) --- 74obreak(td, uap) 75 struct thread *td; 76 struct obreak_args *uap; 77{ 78 struct vmspace *vm = td->td_proc->p_vmspace; 79 vm_offset_t new, old, base; 80 int rv; 81 int error = 0; |
82 boolean_t do_map_wirefuture; |
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82 | 83 |
84 do_map_wirefuture = FALSE; |
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83 new = round_page((vm_offset_t)uap->nsize); 84 vm_map_lock(&vm->vm_map); 85 86 base = round_page((vm_offset_t) vm->vm_daddr); 87 old = base + ctob(vm->vm_dsize); 88 if (new > base) { 89 /* 90 * Check the resource limit, but allow a process to reduce --- 25 unchanged lines hidden (view full) --- 116 } 117 rv = vm_map_insert(&vm->vm_map, NULL, 0, old, new, 118 VM_PROT_ALL, VM_PROT_ALL, 0); 119 if (rv != KERN_SUCCESS) { 120 error = ENOMEM; 121 goto done; 122 } 123 vm->vm_dsize += btoc(new - old); | 85 new = round_page((vm_offset_t)uap->nsize); 86 vm_map_lock(&vm->vm_map); 87 88 base = round_page((vm_offset_t) vm->vm_daddr); 89 old = base + ctob(vm->vm_dsize); 90 if (new > base) { 91 /* 92 * Check the resource limit, but allow a process to reduce --- 25 unchanged lines hidden (view full) --- 118 } 119 rv = vm_map_insert(&vm->vm_map, NULL, 0, old, new, 120 VM_PROT_ALL, VM_PROT_ALL, 0); 121 if (rv != KERN_SUCCESS) { 122 error = ENOMEM; 123 goto done; 124 } 125 vm->vm_dsize += btoc(new - old); |
126 /* 127 * Handle the MAP_WIREFUTURE case for legacy applications, 128 * by marking the newly mapped range of pages as wired. 129 * We are not required to perform a corresponding 130 * vm_map_unwire() before vm_map_delete() below, as 131 * it will forcibly unwire the pages in the range. 132 * 133 * XXX If the pages cannot be wired, no error is returned. 134 */ 135 if ((vm->vm_map.flags & MAP_WIREFUTURE) == MAP_WIREFUTURE) { 136 if (bootverbose) 137 printf("obreak: MAP_WIREFUTURE set\n"); 138 do_map_wirefuture = TRUE; 139 } |
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124 } else if (new < old) { 125 rv = vm_map_delete(&vm->vm_map, new, old); 126 if (rv != KERN_SUCCESS) { 127 error = ENOMEM; 128 goto done; 129 } 130 vm->vm_dsize -= btoc(old - new); 131 } 132done: 133 vm_map_unlock(&vm->vm_map); | 140 } else if (new < old) { 141 rv = vm_map_delete(&vm->vm_map, new, old); 142 if (rv != KERN_SUCCESS) { 143 error = ENOMEM; 144 goto done; 145 } 146 vm->vm_dsize -= btoc(old - new); 147 } 148done: 149 vm_map_unlock(&vm->vm_map); |
150 151 if (do_map_wirefuture) 152 (void) vm_map_wire(&vm->vm_map, old, new, 153 VM_MAP_WIRE_USER|VM_MAP_WIRE_NOHOLES); 154 |
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134 return (error); 135} 136 137#ifndef _SYS_SYSPROTO_H_ 138struct ovadvise_args { 139 int anom; 140}; 141#endif --- 14 unchanged lines hidden --- | 155 return (error); 156} 157 158#ifndef _SYS_SYSPROTO_H_ 159struct ovadvise_args { 160 int anom; 161}; 162#endif --- 14 unchanged lines hidden --- |