sg_pager.c (d9a447559bc04121f7c6682e64abe67efa154864) sg_pager.c (89f6b8632cc94bca2738b4fcc26e1189ef4f5dde)
1/*-
2 * Copyright (c) 2009 Advanced Computing Technologies LLC
3 * Written by: John H. Baldwin <jhb@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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31/*
32 * This pager manages OBJT_SG objects. These objects are backed by
33 * a scatter/gather list of physical address ranges.
34 */
35
36#include <sys/param.h>
37#include <sys/lock.h>
38#include <sys/mutex.h>
1/*-
2 * Copyright (c) 2009 Advanced Computing Technologies LLC
3 * Written by: John H. Baldwin <jhb@FreeBSD.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:

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31/*
32 * This pager manages OBJT_SG objects. These objects are backed by
33 * a scatter/gather list of physical address ranges.
34 */
35
36#include <sys/param.h>
37#include <sys/lock.h>
38#include <sys/mutex.h>
39#include <sys/rwlock.h>
39#include <sys/sglist.h>
40#include <vm/vm.h>
41#include <vm/vm_param.h>
42#include <vm/vm_object.h>
43#include <vm/vm_page.h>
44#include <vm/vm_pager.h>
45#include <vm/vm_phys.h>
46#include <vm/uma.h>

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137 struct sglist *sg;
138 vm_page_t m_paddr, page;
139 vm_pindex_t offset;
140 vm_paddr_t paddr;
141 vm_memattr_t memattr;
142 size_t space;
143 int i;
144
40#include <sys/sglist.h>
41#include <vm/vm.h>
42#include <vm/vm_param.h>
43#include <vm/vm_object.h>
44#include <vm/vm_page.h>
45#include <vm/vm_pager.h>
46#include <vm/vm_phys.h>
47#include <vm/uma.h>

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138 struct sglist *sg;
139 vm_page_t m_paddr, page;
140 vm_pindex_t offset;
141 vm_paddr_t paddr;
142 vm_memattr_t memattr;
143 size_t space;
144 int i;
145
145 VM_OBJECT_LOCK_ASSERT(object, MA_OWNED);
146 VM_OBJECT_ASSERT_WLOCKED(object);
146 sg = object->handle;
147 memattr = object->memattr;
147 sg = object->handle;
148 memattr = object->memattr;
148 VM_OBJECT_UNLOCK(object);
149 VM_OBJECT_WUNLOCK(object);
149 offset = m[reqpage]->pindex;
150
151 /*
152 * Lookup the physical address of the requested page. An initial
153 * value of '1' instead of '0' is used so we can assert that the
154 * page is found since '0' can be a valid page-aligned physical
155 * address.
156 */

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175 }
176
177 /* Return a fake page for the requested page. */
178 KASSERT(!(m[reqpage]->flags & PG_FICTITIOUS),
179 ("backing page for SG is fake"));
180
181 /* Construct a new fake page. */
182 page = vm_page_getfake(paddr, memattr);
150 offset = m[reqpage]->pindex;
151
152 /*
153 * Lookup the physical address of the requested page. An initial
154 * value of '1' instead of '0' is used so we can assert that the
155 * page is found since '0' can be a valid page-aligned physical
156 * address.
157 */

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176 }
177
178 /* Return a fake page for the requested page. */
179 KASSERT(!(m[reqpage]->flags & PG_FICTITIOUS),
180 ("backing page for SG is fake"));
181
182 /* Construct a new fake page. */
183 page = vm_page_getfake(paddr, memattr);
183 VM_OBJECT_LOCK(object);
184 VM_OBJECT_WLOCK(object);
184 TAILQ_INSERT_TAIL(&object->un_pager.sgp.sgp_pglist, page, pageq);
185
186 /* Free the original pages and insert this fake page into the object. */
187 for (i = 0; i < count; i++) {
188 vm_page_lock(m[i]);
189 vm_page_free(m[i]);
190 vm_page_unlock(m[i]);
191 }

--- 26 unchanged lines hidden --- 		185 TAILQ_INSERT_TAIL(&object->un_pager.sgp.sgp_pglist, page, pageq);
186
187 /* Free the original pages and insert this fake page into the object. */
188 for (i = 0; i < count; i++) {
189 vm_page_lock(m[i]);
190 vm_page_free(m[i]);
191 vm_page_unlock(m[i]);
192 }

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