D4444.id11249.diff
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	Index: dev/drm2/ttm/ttm_bo.c
	===================================================================
	--- dev/drm2/ttm/ttm_bo.c
	+++ dev/drm2/ttm/ttm_bo.c
	@@ -1488,21 +1488,21 @@
	struct ttm_bo_global_ref *bo_ref =
	container_of(ref, struct ttm_bo_global_ref, ref);
	struct ttm_bo_global *glob = ref->object;
	- int ret;
	+ int req, ret;
	int tries;

	sx_init(&glob->device_list_mutex, "ttmdlm");
	mtx_init(&glob->lru_lock, "ttmlru", NULL, MTX_DEF);
	glob->mem_glob = bo_ref->mem_glob;
	+ req = VM_ALLOC_NORMAL \| VM_ALLOC_NOOBJ;
	tries = 0;
	retry:
	- glob->dummy_read_page = vm_page_alloc_contig(NULL, 0,
	- VM_ALLOC_NORMAL \| VM_ALLOC_NOOBJ,
	+ glob->dummy_read_page = vm_page_alloc_contig(NULL, 0, req,
	1, 0, VM_MAX_ADDRESS, PAGE_SIZE, 0, VM_MEMATTR_UNCACHEABLE);

	if (unlikely(glob->dummy_read_page == NULL)) {
	- if (tries < 1) {
	- vm_pageout_grow_cache(tries, 0, VM_MAX_ADDRESS);
	+ if (tries < 1 && vm_page_reclaim_contig(req, 1,
	+ 0, VM_MAX_ADDRESS, PAGE_SIZE, 0)) {
	tries++;
	goto retry;
	}
	Index: dev/drm2/ttm/ttm_page_alloc.c
	===================================================================
	--- dev/drm2/ttm/ttm_page_alloc.c
	+++ dev/drm2/ttm/ttm_page_alloc.c
	@@ -166,13 +166,9 @@
	PAGE_SIZE, 0, memattr);
	if (p != NULL \|\| tries > 2)
	return (p);
	-
	- /*
	- * Before growing the cache see if this is just a normal
	- * memory shortage.
	- */
	- VM_WAIT;
	- vm_pageout_grow_cache(tries, 0, 0xffffffff);
	+ if (!vm_page_reclaim_contig(req, 1, 0, 0xffffffff,
	+ PAGE_SIZE, 0))
	+ VM_WAIT;
	}
	}

	Index: mips/include/pmap.h
	===================================================================
	--- mips/include/pmap.h
	+++ mips/include/pmap.h
	@@ -178,7 +178,6 @@
	void pmap_kenter_temporary_free(vm_paddr_t pa);
	void pmap_flush_pvcache(vm_page_t m);
	int pmap_emulate_modified(pmap_t pmap, vm_offset_t va);
	-void pmap_grow_direct_page_cache(void);
	void pmap_page_set_memattr(vm_page_t, vm_memattr_t);

	#endif /* _KERNEL */
	Index: mips/mips/pmap.c
	===================================================================
	--- mips/mips/pmap.c
	+++ mips/mips/pmap.c
	@@ -166,6 +166,7 @@
	static vm_page_t pmap_alloc_direct_page(unsigned int index, int req);
	static vm_page_t pmap_enter_quick_locked(pmap_t pmap, vm_offset_t va,
	vm_page_t m, vm_prot_t prot, vm_page_t mpte);
	+static void pmap_grow_direct_page(int req);
	static int pmap_remove_pte(struct pmap pmap, pt_entry_t ptq, vm_offset_t va,
	pd_entry_t pde);
	static void pmap_remove_page(struct pmap *pmap, vm_offset_t va);
	@@ -1040,14 +1041,16 @@
	bzero(&pmap->pm_stats, sizeof pmap->pm_stats);
	}

	-void
	-pmap_grow_direct_page_cache()
	+static void
	+pmap_grow_direct_page(int req)
	{

	#ifdef __mips_n64
	VM_WAIT;
	#else
	- vm_pageout_grow_cache(3, 0, MIPS_KSEG0_LARGEST_PHYS);
	+ if (!vm_page_reclaim_contig(req, 1, 0, MIPS_KSEG0_LARGEST_PHYS,
	+ PAGE_SIZE, 0))
	+ VM_WAIT;
	#endif
	}

	@@ -1077,13 +1080,15 @@
	{
	vm_offset_t ptdva;
	vm_page_t ptdpg;
	- int i;
	+ int i, req_class;

	/*
	* allocate the page directory page
	*/
	- while ((ptdpg = pmap_alloc_direct_page(NUSERPGTBLS, VM_ALLOC_NORMAL)) == NULL)
	- pmap_grow_direct_page_cache();
	+ req_class = VM_ALLOC_NORMAL;
	+ while ((ptdpg = pmap_alloc_direct_page(NUSERPGTBLS, req_class)) ==
	+ NULL)
	+ pmap_grow_direct_page(req_class);

	ptdva = MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(ptdpg));
	pmap->pm_segtab = (pd_entry_t *)ptdva;
	@@ -1107,15 +1112,17 @@
	{
	vm_offset_t pageva;
	vm_page_t m;
	+ int req_class;

	/*
	* Find or fabricate a new pagetable page
	*/
	- if ((m = pmap_alloc_direct_page(ptepindex, VM_ALLOC_NORMAL)) == NULL) {
	+ req_class = VM_ALLOC_NORMAL;
	+ if ((m = pmap_alloc_direct_page(ptepindex, req_class)) == NULL) {
	if ((flags & PMAP_ENTER_NOSLEEP) == 0) {
	PMAP_UNLOCK(pmap);
	rw_wunlock(&pvh_global_lock);
	- pmap_grow_direct_page_cache();
	+ pmap_grow_direct_page(req_class);
	rw_wlock(&pvh_global_lock);
	PMAP_LOCK(pmap);
	}
	@@ -1241,9 +1248,10 @@
	vm_page_t nkpg;
	pd_entry_t pde, pdpe;
	pt_entry_t *pte;
	- int i;
	+ int i, req_class;

	mtx_assert(&kernel_map->system_mtx, MA_OWNED);
	+ req_class = VM_ALLOC_INTERRUPT;
	addr = roundup2(addr, NBSEG);
	if (addr - 1 >= kernel_map->max_offset)
	addr = kernel_map->max_offset;
	@@ -1252,7 +1260,7 @@
	#ifdef __mips_n64
	if (*pdpe == 0) {
	/* new intermediate page table entry */
	- nkpg = pmap_alloc_direct_page(nkpt, VM_ALLOC_INTERRUPT);
	+ nkpg = pmap_alloc_direct_page(nkpt, req_class);
	if (nkpg == NULL)
	panic("pmap_growkernel: no memory to grow kernel");
	*pdpe = (pd_entry_t)MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(nkpg));
	@@ -1272,8 +1280,13 @@
	/*
	* This index is bogus, but out of the way
	*/
	- nkpg = pmap_alloc_direct_page(nkpt, VM_ALLOC_INTERRUPT);
	- if (!nkpg)
	+ nkpg = pmap_alloc_direct_page(nkpt, req_class);
	+#ifndef __mips_n64
	+ if (nkpg == NULL && vm_page_reclaim_contig(req_class, 1,
	+ 0, MIPS_KSEG0_LARGEST_PHYS, PAGE_SIZE, 0))
	+ nkpg = pmap_alloc_direct_page(nkpt, req_class);
	+#endif
	+ if (nkpg == NULL)
	panic("pmap_growkernel: no memory to grow kernel");
	nkpt++;
	*pde = (pd_entry_t)MIPS_PHYS_TO_DIRECT(VM_PAGE_TO_PHYS(nkpg));
	Index: mips/mips/uma_machdep.c
	===================================================================
	--- mips/mips/uma_machdep.c
	+++ mips/mips/uma_machdep.c
	@@ -53,11 +53,16 @@

	for (;;) {
	m = vm_page_alloc_freelist(VM_FREELIST_DIRECT, pflags);
	+#ifndef __mips_n64
	+ if (m == NULL && vm_page_reclaim_contig(pflags, 1,
	+ 0, MIPS_KSEG0_LARGEST_PHYS, PAGE_SIZE, 0))
	+ continue;
	+#endif
	if (m == NULL) {
	if (wait & M_NOWAIT)
	return (NULL);
	else
	- pmap_grow_direct_page_cache();
	+ VM_WAIT;
	} else
	break;
	}
	Index: vm/vm_kern.c
	===================================================================
	--- vm/vm_kern.c
	+++ vm/vm_kern.c
	@@ -181,7 +181,10 @@
	if (m == NULL) {
	VM_OBJECT_WUNLOCK(object);
	if (tries < ((flags & M_NOWAIT) != 0 ? 1 : 3)) {
	- vm_pageout_grow_cache(tries, low, high);
	+ if (!vm_page_reclaim_contig(pflags, 1,
	+ low, high, PAGE_SIZE, 0) &&
	+ (flags & M_WAITOK) != 0)
	+ VM_WAIT;
	VM_OBJECT_WLOCK(object);
	tries++;
	goto retry;
	@@ -217,6 +220,7 @@
	vm_offset_t addr, tmp;
	vm_ooffset_t offset;
	vm_page_t end_m, m;
	+ u_long npages;
	int pflags, tries;

	size = round_page(size);
	@@ -224,15 +228,18 @@
	return (0);
	offset = addr - VM_MIN_KERNEL_ADDRESS;
	pflags = malloc2vm_flags(flags) \| VM_ALLOC_NOBUSY \| VM_ALLOC_WIRED;
	+ npages = atop(size);
	VM_OBJECT_WLOCK(object);
	tries = 0;
	retry:
	m = vm_page_alloc_contig(object, OFF_TO_IDX(offset), pflags,
	- atop(size), low, high, alignment, boundary, memattr);
	+ npages, low, high, alignment, boundary, memattr);
	if (m == NULL) {
	VM_OBJECT_WUNLOCK(object);
	if (tries < ((flags & M_NOWAIT) != 0 ? 1 : 3)) {
	- vm_pageout_grow_cache(tries, low, high);
	+ if (!vm_page_reclaim_contig(pflags, npages, low, high,
	+ alignment, boundary) && (flags & M_WAITOK) != 0)
	+ VM_WAIT;
	VM_OBJECT_WLOCK(object);
	tries++;
	goto retry;
	@@ -240,7 +247,7 @@
	vmem_free(vmem, addr, size);
	return (0);
	}
	- end_m = m + atop(size);
	+ end_m = m + npages;
	tmp = addr;
	for (; m < end_m; m++) {
	if ((flags & M_ZERO) && (m->flags & PG_ZERO) == 0)
	@@ -528,6 +535,36 @@
	vm_map_unlock(m);
	}

	+/*
	+ * XXX
	+ */
	+static int
	+debug_vm_compact(SYSCTL_HANDLER_ARGS)
	+{
	+ vm_offset_t va;
	+ vm_paddr_t pa;
	+ int error, i;
	+
	+ i = 0;
	+ error = sysctl_handle_int(oidp, &i, 0, req);
	+ if (error != 0)
	+ return (error);
	+ if (i != 0) {
	+ pa = 0;
	+ va = kmem_alloc_contig(kernel_arena, 1024 * PAGE_SIZE, M_WAITOK,
	+ 0, 0x7fffffff, 1024 * PAGE_SIZE, 0, VM_MEMATTR_DEFAULT);
	+ if (va != 0) {
	+ pa = pmap_kextract(va);
	+ kmem_free(kernel_arena, va, 1024 * PAGE_SIZE);
	+ }
	+ printf("va: %#jx -> pa: %#jx\n", (uintmax_t)va, (uintmax_t)pa);
	+ }
	+ return (0);
	+}
	+
	+SYSCTL_PROC(_debug, OID_AUTO, vm_compact, CTLTYPE_INT \| CTLFLAG_RW, 0, 0,
	+ debug_vm_compact, "I", "set to trigger vm_compact event");
	+
	#ifdef DIAGNOSTIC
	/*
	* Allow userspace to directly trigger the VM drain routine for testing
	Index: vm/vm_page.h
	===================================================================
	--- vm/vm_page.h
	+++ vm/vm_page.h
	@@ -474,6 +474,8 @@
	boolean_t vm_page_ps_is_valid(vm_page_t m);
	void vm_page_putfake(vm_page_t m);
	void vm_page_readahead_finish(vm_page_t m);
	+bool vm_page_reclaim_contig(int req, u_long npages, vm_paddr_t low,
	+ vm_paddr_t high, u_long alignment, vm_paddr_t boundary);
	void vm_page_reference(vm_page_t m);
	void vm_page_remove (vm_page_t);
	int vm_page_rename (vm_page_t, vm_object_t, vm_pindex_t);
	@@ -482,6 +484,8 @@
	void vm_page_requeue(vm_page_t m);
	void vm_page_requeue_locked(vm_page_t m);
	int vm_page_sbusied(vm_page_t m);
	+vm_page_t vm_page_scan_contig(u_long npages, vm_page_t m_start,
	+ vm_page_t m_end, u_long alignment, vm_paddr_t boundary, int options);
	void vm_page_set_valid_range(vm_page_t m, int base, int size);
	int vm_page_sleep_if_busy(vm_page_t m, const char *msg);
	vm_offset_t vm_page_startup(vm_offset_t vaddr);
	Index: vm/vm_page.c
	===================================================================
	--- vm/vm_page.c
	+++ vm/vm_page.c
	@@ -158,11 +158,14 @@
	static void vm_page_cache_turn_free(vm_page_t m);
	static void vm_page_clear_dirty_mask(vm_page_t m, vm_page_bits_t pagebits);
	static void vm_page_enqueue(uint8_t queue, vm_page_t m);
	+static void vm_page_free_wakeup(void);
	static void vm_page_init_fakepg(void *dummy);
	static int vm_page_insert_after(vm_page_t m, vm_object_t object,
	vm_pindex_t pindex, vm_page_t mpred);
	static void vm_page_insert_radixdone(vm_page_t m, vm_object_t object,
	vm_page_t mpred);
	+static int vm_page_reclaim_run(int req_class, u_long npages, vm_page_t m_run,
	+ vm_paddr_t high);

	SYSINIT(vm_page, SI_SUB_VM, SI_ORDER_SECOND, vm_page_init_fakepg, NULL);

	@@ -2103,7 +2106,591 @@
	return (m);
	}

	+#define VPSC_ANY 0 /* No restrictions. */
	+#define VPSC_NORESERV 1 /* Skip reservations; implies VPSC_NOSUPER. */
	+#define VPSC_NOSUPER 2 /* Skip superpages. */
	+
	/*
	+ * vm_page_scan_contig:
	+ *
	+ * Scan vm_page_array[] between the specified entries "m_start" and
	+ * "m_end" for a contiguous set of physical pages that satisfy the
	+ * specified conditions, and return the lowest page in the set. The
	+ * specified "alignment" determines the alignment of the lowest physical
	+ * page in the set. If the specified "boundary" is non-zero, then the
	+ * set of physical pages cannot span a physical address that is a
	+ * multiple of "boundary".
	+ *
	+ * "m_end" is never dereferenced, so it need not point to a vm_page
	+ * structure within vm_page_array[].
	+ *
	+ * "npages" must be greater than zero. "m_start" and "m_end" must not
	+ * span a hole (or discontiguity) in the physical address space. Both
	+ * "alignment" and "boundary" must be a power of two.
	+ */
	+vm_page_t
	+vm_page_scan_contig(u_long npages, vm_page_t m_start, vm_page_t m_end,
	+ u_long alignment, vm_paddr_t boundary, int options)
	+{
	+ struct mtx m_mtx, new_mtx;
	+ vm_object_t object;
	+ vm_paddr_t pa;
	+ vm_page_t m, m_run;
	+#if VM_NRESERVLEVEL > 0
	+ int level;
	+#endif
	+ int m_inc, order, run_ext, run_len;
	+
	+ KASSERT(npages > 0, ("npages is 0"));
	+ KASSERT(powerof2(alignment), ("alignment is not a power of 2"));
	+ KASSERT(powerof2(boundary), ("boundary is not a power of 2"));
	+ m_run = NULL;
	+ run_len = 0;
	+ m_mtx = NULL;
	+ for (m = m_start; m < m_end && run_len < npages; m += m_inc) {
	+ KASSERT((m->flags & (PG_FICTITIOUS \| PG_MARKER)) == 0,
	+ ("page %p is PG_FICTITIOUS or PG_MARKER", m));
	+
	+ /*
	+ * If the current run is empty, check the page's physical
	+ * address against the end, alignment, and boundary
	+ * conditions. If the page doesn't satisfy these conditions,
	+ * either terminate the scan or advance to the next page that
	+ * satisfies the failed condition.
	+ */
	+ if (run_len == 0) {
	+ KASSERT(m_run == NULL, ("m_run != NULL"));
	+ if (m + npages > m_end)
	+ break;
	+ pa = VM_PAGE_TO_PHYS(m);
	+ if ((pa & (alignment - 1)) != 0) {
	+ m_inc = atop(roundup2(pa, alignment) - pa);
	+ continue;
	+ }
	+ if (((pa ^ (pa + ptoa(npages) - 1)) & ~(boundary -
	+ 1)) != 0) {
	+ m_inc = atop(roundup2(pa, boundary) - pa);
	+ continue;/XXX/
	+ }
	+ } else
	+ KASSERT(m_run != NULL, ("m_run == NULL"));
	+
	+ /*
	+ * Avoid releasing and reacquiring the same page lock.
	+ */
	+ new_mtx = vm_page_lockptr(m);
	+ if (m_mtx != new_mtx) {
	+ if (m_mtx != NULL)
	+ mtx_unlock(m_mtx);
	+ m_mtx = new_mtx;
	+ mtx_lock(m_mtx);
	+ }
	+ m_inc = 1;
	+retry:
	+ if (m->wire_count != 0 \|\| m->hold_count != 0)
	+ run_ext = 0;
	+#if VM_NRESERVLEVEL > 0
	+ else if ((level = vm_reserv_level(m)) >= 0 &&
	+ (options & VPSC_NORESERV) != 0) {
	+ run_ext = 0;
	+ /* Advance to the end of the reservation. */
	+ pa = VM_PAGE_TO_PHYS(m);
	+ m_inc = atop(roundup2(pa + 1, vm_reserv_size(level)) -
	+ pa);
	+ }
	+#endif
	+ else if ((object = m->object) != NULL) {
	+ /*
	+ * The page is considered eligible for relocation if
	+ * and only if it could be laundered or reclaimed by
	+ * the page daemon.
	+ */
	+ if (!VM_OBJECT_TRYRLOCK(object)) {
	+ mtx_unlock(m_mtx);
	+ VM_OBJECT_RLOCK(object);
	+ mtx_lock(m_mtx);
	+ if (m->object != object) {
	+ /*
	+ * The page may have been freed.
	+ */
	+ VM_OBJECT_RUNLOCK(object);
	+ goto retry;
	+ } else if (m->wire_count != 0 \|\|
	+ m->hold_count != 0) {
	+ run_ext = 0;
	+ goto unlock;
	+ }
	+ }
	+ KASSERT((m->flags & PG_UNHOLDFREE) == 0,
	+ ("page %p is PG_UNHOLDFREE", m));
	+ /* Don't care: PG_NODUMP, PG_WINATCFLS, PG_ZERO. */
	+ if (object->type != OBJT_DEFAULT &&
	+ object->type != OBJT_SWAP &&
	+ object->type != OBJT_VNODE)
	+ run_ext = 0;
	+ else if ((m->flags & PG_CACHED) != 0 \|\|
	+ m != vm_page_lookup(object, m->pindex)) {
	+ /*
	+ * The page is cached or recently converted
	+ * from cached to free.
	+ */
	+#if VM_NRESERVLEVEL > 0
	+ if (level >= 0) {
	+ /*
	+ * The page is reserved. Extend the
	+ * current run by one page.
	+ */
	+ run_ext = 1;
	+ } else
	+#endif
	+ if ((order = m->order) < VM_NFREEORDER) {
	+ /*
	+ * The page is enqueued in the
	+ * physical memory allocator's cache/
	+ * free page queues. Moreover, it is
	+ * the first page in a power-of-two-
	+ * sized set of contiguous cache/free
	+ * pages. Add the entire set to the
	+ * current run, and jump ahead.
	+ */
	+ run_ext = 1 << order;
	+ m_inc = 1 << order;
	+ } else
	+ run_ext = 0;
	+#if VM_NRESERVLEVEL > 0
	+ } else if ((options & VPSC_NOSUPER) != 0 &&
	+ (level = vm_reserv_level_iffullpop(m)) >= 0) {
	+ run_ext = 0;
	+ /* Advance to the end of the superpage. */
	+ pa = VM_PAGE_TO_PHYS(m);
	+ m_inc = atop(roundup2(pa + 1,
	+ vm_reserv_size(level)) - pa);
	+#endif
	+ } else if (object->memattr == VM_MEMATTR_DEFAULT &&
	+ m->queue != PQ_NONE && !vm_page_busied(m)) {
	+ /*
	+ * The page is allocated but eligible for
	+ * relocation. Extend the current run by one
	+ * page.
	+ */
	+ KASSERT(pmap_page_get_memattr(m) ==
	+ VM_MEMATTR_DEFAULT,
	+ ("page %p has an unexpected memattr", m));
	+ KASSERT((m->oflags & (VPO_SWAPINPROG \|
	+ VPO_SWAPSLEEP \| VPO_UNMANAGED)) == 0,
	+ ("page %p has unexpected oflags", m));
	+ /* Don't care: VPO_NOSYNC. */
	+ run_ext = 1;
	+ } else
	+ run_ext = 0;
	+unlock:
	+ VM_OBJECT_RUNLOCK(object);
	+#if VM_NRESERVLEVEL > 0
	+ } else if (level >= 0) {
	+ /*
	+ * The page is reserved but not yet allocated. In
	+ * other words, it is still cached or free. Extend
	+ * the current run by one page.
	+ */
	+ run_ext = 1;
	+#endif
	+ } else if ((order = m->order) < VM_NFREEORDER) {
	+ /*
	+ * The page is enqueued in the physical memory
	+ * allocator's cache/free page queues. Moreover, it
	+ * is the first page in a contiguous set of cache/free
	+ * pages. Add the entire set to the current run, and
	+ * jump ahead.
	+ */
	+ run_ext = 1 << order;
	+ m_inc = 1 << order;
	+ } else {
	+ /*
	+ * Skip the page: (1) It is enqueued in the physical
	+ * memory allocator's cache/free page queues.
	+ * However, it is not the first page in a contiguous
	+ * set of cache/free pages. This case rarely occurs
	+ * because the scan is performed in ascending
	+ * order. (2) It is not reserved, and it is
	+ * transitioning from free to allocated. Conversely,
	+ * the transition from allocated to free for managed
	+ * pages is blocked by the page lock. (3) It is
	+ * allocated but not contained by an object and not
	+ * wired, e.g., allocated by Xen's balloon driver.
	+ */
	+ run_ext = 0;
	+ }
	+
	+ /*
	+ * Extend or reset the current run of pages.
	+ */
	+ if (run_ext > 0) {
	+ if (run_len == 0)
	+ m_run = m;
	+ run_len += run_ext;
	+ } else {
	+ if (run_len > 0) {
	+ m_run = NULL;
	+ run_len = 0;
	+ }
	+ }
	+ }
	+ if (m_mtx != NULL)
	+ mtx_unlock(m_mtx);
	+ if (run_len >= npages)
	+ return (m_run);
	+ return (NULL);
	+}
	+
	+/*
	+ * vm_page_reclaim_run:
	+ *
	+ * Try to relocate the allocated virtual pages within the specified run
	+ * of physical pages. Free the physical pages underlying the relocated
	+ * virtual pages. Returns 0 if every physical page within the run is
	+ * either already free or successfully relocated. Otherwise, returns a
	+ * non-zero value indicating why the relocation of a virtual page was
	+ * unsuccessful.
	+ *
	+ * "req_class" must be an allocation class.
	+ */
	+static int
	+vm_page_reclaim_run(int req_class, u_long npages, vm_page_t m_run,
	+ vm_paddr_t high)
	+{
	+ struct mtx m_mtx, new_mtx;
	+ struct spglist free;
	+ vm_object_t object;
	+ vm_paddr_t pa;
	+ vm_page_t m, m_end, m_new, m_tmp;
	+ int error, order, req;
	+// long case0 = 0, case2 = 0, case3 = 0;/XXX/
	+
	+ KASSERT((req_class & VM_ALLOC_CLASS_MASK) == req_class,
	+ ("req_class is not an allocation class"));
	+ SLIST_INIT(&free);
	+ error = 0;
	+ m = m_run;
	+ m_end = m_run + npages;
	+ m_mtx = NULL;
	+ for (; error == 0 && m < m_end; m++) {
	+ KASSERT((m->flags & (PG_FICTITIOUS \| PG_MARKER)) == 0,
	+ ("page %p is PG_FICTITIOUS or PG_MARKER", m));
	+
	+ /*
	+ * Avoid releasing and reacquiring the same page lock.
	+ */
	+ new_mtx = vm_page_lockptr(m);
	+ if (m_mtx != new_mtx) {
	+ if (m_mtx != NULL)
	+ mtx_unlock(m_mtx);
	+ m_mtx = new_mtx;
	+ mtx_lock(m_mtx);
	+ }
	+retry:
	+ if (m->wire_count != 0 \|\| m->hold_count != 0)
	+ error = EBUSY;
	+ else if ((object = m->object) != NULL) {
	+ /*
	+ * The page is relocated if and only if it could be
	+ * laundered or reclaimed by the page daemon.
	+ */
	+ if (!VM_OBJECT_TRYWLOCK(object)) {
	+ mtx_unlock(m_mtx);
	+ VM_OBJECT_WLOCK(object);
	+ mtx_lock(m_mtx);
	+ if (m->object != object) {
	+ /*
	+ * The page may have been freed.
	+ */
	+ VM_OBJECT_WUNLOCK(object);
	+ goto retry;
	+ } else if (m->wire_count != 0 \|\|
	+ m->hold_count != 0) {
	+ error = EBUSY;
	+ goto unlock;
	+ }
	+ }
	+ KASSERT((m->flags & PG_UNHOLDFREE) == 0,
	+ ("page %p is PG_UNHOLDFREE", m));
	+ /* Don't care: PG_NODUMP, PG_WINATCFLS, PG_ZERO. */
	+ if (object->type != OBJT_DEFAULT &&
	+ object->type != OBJT_SWAP &&
	+ object->type != OBJT_VNODE)
	+ error = EINVAL;
	+ else if ((m->flags & PG_CACHED) != 0 \|\|
	+ m != vm_page_lookup(object, m->pindex)) {
	+ /*
	+ * The page is cached or recently converted
	+ * from cached to free.
	+ */
	+ VM_OBJECT_WUNLOCK(object);
	+ goto cached;
	+ } else if (object->memattr != VM_MEMATTR_DEFAULT)
	+ error = EINVAL;
	+ else if (m->queue != PQ_NONE && !vm_page_busied(m)) {
	+ KASSERT(pmap_page_get_memattr(m) ==
	+ VM_MEMATTR_DEFAULT,
	+ ("page %p has an unexpected memattr", m));
	+ KASSERT((m->oflags & (VPO_SWAPINPROG \|
	+ VPO_SWAPSLEEP \| VPO_UNMANAGED)) == 0,
	+ ("page %p has unexpected oflags", m));
	+ /* Don't care: VPO_NOSYNC. */
	+ if (m->valid != 0) {
	+ /*
	+ * First, try to allocate a new page
	+ * that is above "high". Failing
	+ * that, try to allocate a new page
	+ * that is below "m_run". Allocate
	+ * the new page between the end of
	+ * "m_run" and "high" only as a last
	+ * resort.
	+ */
	+ req = req_class \| VM_ALLOC_NOOBJ;
	+ if ((m->flags & PG_NODUMP) != 0)
	+ req \|= VM_ALLOC_NODUMP;
	+ if (trunc_page(high) !=
	+ ~(vm_paddr_t)PAGE_MASK) {
	+ m_new = vm_page_alloc_contig(
	+ NULL, 0, req, 1,
	+ round_page(high),
	+ ~(vm_paddr_t)0,
	+ PAGE_SIZE, 0,
	+ VM_MEMATTR_DEFAULT);
	+ } else
	+ m_new = NULL;
	+ if (m_new == NULL) {
	+ pa = VM_PAGE_TO_PHYS(m_run);
	+ m_new = vm_page_alloc_contig(
	+ NULL, 0, req, 1,
	+ 0, pa - 1, PAGE_SIZE, 0,
	+ VM_MEMATTR_DEFAULT);
	+ }
	+ if (m_new == NULL) {
	+ pa += ptoa(npages);
	+ m_new = vm_page_alloc_contig(
	+ NULL, 0, req, 1,
	+ pa, high, PAGE_SIZE, 0,
	+ VM_MEMATTR_DEFAULT);
	+ }
	+ if (m_new == NULL) {
	+ error = ENOMEM;
	+ goto unlock;
	+ }
	+ KASSERT(m_new->wire_count == 0,
	+ ("page %p is wired", m));
	+
	+ /*
	+ * Replace "m" with the new page. For
	+ * vm_page_replace(), "m" must be busy
	+ * and dequeued. Finally, change "m"
	+ * as if vm_page_free() was called.
	+ */
	+ if (object->ref_count != 0)
	+ pmap_remove_all(m);
	+ m_new->aflags = m->aflags;
	+ KASSERT(m_new->oflags == VPO_UNMANAGED,
	+ ("page %p is managed", m));
	+ m_new->oflags = m->oflags & VPO_NOSYNC;
	+ pmap_copy_page(m, m_new);
	+ m_new->valid = m->valid;
	+ m_new->dirty = m->dirty;
	+ m->flags &= ~PG_ZERO;
	+ vm_page_xbusy(m);
	+ vm_page_remque(m);
	+ m_tmp = vm_page_replace(m_new, object,
	+ m->pindex);
	+ KASSERT(m_tmp == m,
	+ ("replaced page %p, not page %p",
	+ m_tmp, m));
	+ m->valid = 0;
	+ vm_page_undirty(m);
	+
	+ /*
	+ * The new page must be deactivated
	+ * before the object is unlocked.
	+ */
	+ new_mtx = vm_page_lockptr(m_new);
	+ if (m_mtx != new_mtx) {
	+ mtx_unlock(m_mtx);
	+ m_mtx = new_mtx;
	+ mtx_lock(m_mtx);
	+ }
	+ vm_page_deactivate(m_new);
	+ } else {
	+ m->flags &= ~PG_ZERO;
	+ vm_page_remque(m);
	+ vm_page_remove(m);
	+ KASSERT(m->dirty == 0,
	+ ("page %p is dirty", m));
	+ }
	+ SLIST_INSERT_HEAD(&free, m, plinks.s.ss);
	+// case2++;/XXX/
	+ } else
	+ error = EBUSY;
	+unlock:
	+ VM_OBJECT_WUNLOCK(object);
	+ } else {
	+cached:
	+ mtx_lock(&vm_page_queue_free_mtx);
	+ order = m->order;
	+ if (order < VM_NFREEORDER) {
	+ /*
	+ * The page is enqueued in the physical memory
	+ * allocator's cache/free page queues.
	+ * Moreover, it is the first page in a power-
	+ * of-two-sized set of contiguous cache/free
	+ * pages. Jump ahead to the last page within
	+ * the set, and continue from there.
	+ */
	+ m += (1 << order) - 1;
	+// case0 += 1 << order;/XXX/
	+ }
	+#if VM_NRESERVLEVEL > 0
	+ else if (vm_reserv_is_page_free(m)) {
	+ order = 0;
	+// case3++;/XXX/
	+ }
	+#endif
	+ mtx_unlock(&vm_page_queue_free_mtx);
	+ if (order == VM_NFREEORDER)
	+ error = EINVAL;
	+ }
	+ }
	+ if (m_mtx != NULL)
	+ mtx_unlock(m_mtx);
	+ if ((m = SLIST_FIRST(&free)) != NULL) {
	+ mtx_lock(&vm_page_queue_free_mtx);
	+ do {
	+ SLIST_REMOVE_HEAD(&free, plinks.s.ss);
	+ vm_phys_freecnt_adj(m, 1);
	+#if VM_NRESERVLEVEL > 0
	+ if (!vm_reserv_free_page(m))
	+#else
	+ if (true)
	+#endif
	+ vm_phys_free_pages(m, 0);
	+ } while ((m = SLIST_FIRST(&free)) != NULL);
	+ vm_page_zero_idle_wakeup();
	+ vm_page_free_wakeup();
	+ mtx_unlock(&vm_page_queue_free_mtx);
	+ }
	+// order = m_run->order;
	+// printf("error: %d, case0: %ld, case2: %ld, case3: %ld, order: %d\n",
	+// error, case0, case2, case3, order); /XXX/
	+ return (error);
	+}
	+
	+#define NRUNS 16
	+
	+CTASSERT(powerof2(NRUNS));
	+
	+#define RUN_INDEX(count) ((count) & (NRUNS - 1))
	+
	+#define MIN_RECLAIM 8
	+
	+/*
	+ * vm_page_reclaim_contig:
	+ *
	+ * Reclaim physical memory contiguity by relocating virtual pages. XXX
	+ *
	+ * The caller must always specify an allocation class through "req".
	+ *
	+ * allocation classes:
	+ * VM_ALLOC_NORMAL normal process request
	+ * VM_ALLOC_SYSTEM system really needs a page
	+ * VM_ALLOC_INTERRUPT interrupt time request
	+ *
	+ * The optional allocation flags are ignored.
	+ *
	+ * "npages" must be greater than zero. Both "alignment" and "boundary"
	+ * must be a power of two.
	+ */
	+bool
	+vm_page_reclaim_contig(int req, u_long npages, vm_paddr_t low, vm_paddr_t high,
	+ u_long alignment, vm_paddr_t boundary)
	+{
	+ vm_paddr_t curr_low;
	+ vm_page_t m_run, m_runs[NRUNS];
	+ u_long count, reclaimed;
	+ int error, i, options, req_class;
	+
	+ KASSERT(npages > 0, ("npages is 0"));
	+ KASSERT(powerof2(alignment), ("alignment is not a power of 2"));
	+ KASSERT(powerof2(boundary), ("boundary is not a power of 2"));
	+ req_class = req & VM_ALLOC_CLASS_MASK;
	+
	+ /*
	+ * The page daemon is allowed to dig deeper into the free page list.
	+ */
	+ if (curproc == pageproc && req_class != VM_ALLOC_INTERRUPT)
	+ req_class = VM_ALLOC_SYSTEM;
	+
	+ /*
	+ * Return if the number of cached and free pages cannot satisfy the
	+ * requested allocation.
	+ */
	+ count = vm_cnt.v_free_count + vm_cnt.v_cache_count;
	+ if (count < npages + vm_cnt.v_free_reserved \|\| (count < npages +
	+ vm_cnt.v_interrupt_free_min && req_class == VM_ALLOC_SYSTEM) \|\|
	+ (count < npages && req_class == VM_ALLOC_INTERRUPT))
	+ return (false);
	+
	+ /*
	+ * Scan up to three times, relaxing the restrictions ("options") on
	+ * the reclamation of reservations and superpages each time.
	+ */
	+ for (options = VPSC_NORESERV;;) {
	+ /*
	+ * Find the highest runs that satisfy the given constraints
	+ * and restrictions, and record them in "m_runs".
	+ */
	+ curr_low = low;
	+ count = 0;
	+ for (;;) {
	+ m_run = vm_phys_scan_contig(npages, curr_low, high,
	+ alignment, boundary, options);
	+ if (m_run == NULL)
	+ break;
	+ curr_low = VM_PAGE_TO_PHYS(m_run) + ptoa(npages);
	+ m_runs[RUN_INDEX(count)] = m_run;
	+ count++;
	+ }
	+
	+ /*
	+ * Reclaim the highest runs in LIFO (descending) order until
	+ * the number of reclaimed pages, "reclaimed", is at least
	+ * MIN_RECLAIM. Reset "reclaimed" each time because each
	+ * reclamation is idempotent, and runs will (likely) recur
	+ * from one scan to the next as restrictions are relaxed.
	+ */
	+ reclaimed = 0;
	+ for (i = 0; count > 0 && i < NRUNS; i++) {
	+ count--;
	+ m_run = m_runs[RUN_INDEX(count)];
	+ error = vm_page_reclaim_run(req_class, npages, m_run,
	+ high);
	+ if (error == 0) {
	+ reclaimed += npages;
	+ if (reclaimed >= MIN_RECLAIM)
	+ return (true);
	+ }
	+ }
	+
	+ /*
	+ * Either relax the restrictions on the next scan or return if
	+ * the last scan had no restrictions.
	+ */
	+ if (options == VPSC_NORESERV)
	+ options = VPSC_NOSUPER;
	+ else if (options == VPSC_NOSUPER)
	+ options = VPSC_ANY;
	+ else if (options == VPSC_ANY)
	+ return (reclaimed != 0);
	+ }
	+}
	+
	+/*
	* vm_wait: (also see VM_WAIT macro)
	*
	* Sleep until free pages are available for allocation.
	Index: vm/vm_pageout.h
	===================================================================
	--- vm/vm_pageout.h
	+++ vm/vm_pageout.h
	@@ -101,7 +101,6 @@

	#ifdef _KERNEL
	int vm_pageout_flush(vm_page_t , int, int, int, int , boolean_t *);
	-void vm_pageout_grow_cache(int, vm_paddr_t, vm_paddr_t);
	void vm_pageout_oom(int shortage);
	#endif
	#endif /* _VM_VM_PAGEOUT_H_ */
	Index: vm/vm_pageout.c
	===================================================================
	--- vm/vm_pageout.c
	+++ vm/vm_pageout.c
	@@ -237,8 +237,6 @@
	CTLFLAG_RW, &vm_page_max_wired, 0, "System-wide limit to wired page count");

	static boolean_t vm_pageout_fallback_object_lock(vm_page_t, vm_page_t *);
	-static boolean_t vm_pageout_launder(struct vm_pagequeue *pq, int, vm_paddr_t,
	- vm_paddr_t);
	#if !defined(NO_SWAPPING)
	static void vm_pageout_map_deactivate_pages(vm_map_t, long);
	static void vm_pageout_object_deactivate_pages(pmap_t, vm_object_t, long);
	@@ -595,170 +593,6 @@
	return (numpagedout);
	}

	-static boolean_t
	-vm_pageout_launder(struct vm_pagequeue *pq, int tries, vm_paddr_t low,
	- vm_paddr_t high)
	-{
	- struct mount *mp;
	- struct vnode *vp;
	- vm_object_t object;
	- vm_paddr_t pa;
	- vm_page_t m, m_tmp, next;
	- int lockmode;
	-
	- vm_pagequeue_lock(pq);
	- TAILQ_FOREACH_SAFE(m, &pq->pq_pl, plinks.q, next) {
	- if ((m->flags & PG_MARKER) != 0)
	- continue;
	- pa = VM_PAGE_TO_PHYS(m);
	- if (pa < low \|\| pa + PAGE_SIZE > high)
	- continue;
	- if (!vm_pageout_page_lock(m, &next) \|\| m->hold_count != 0) {
	- vm_page_unlock(m);
	- continue;
	- }
	- object = m->object;
	- if ((!VM_OBJECT_TRYWLOCK(object) &&
	- (!vm_pageout_fallback_object_lock(m, &next) \|\|
	- m->hold_count != 0)) \|\| vm_page_busied(m)) {
	- vm_page_unlock(m);
	- VM_OBJECT_WUNLOCK(object);
	- continue;
	- }
	- vm_page_test_dirty(m);
	- if (m->dirty == 0 && object->ref_count != 0)
	- pmap_remove_all(m);
	- if (m->dirty != 0) {
	- vm_page_unlock(m);
	- if (tries == 0 \|\| (object->flags & OBJ_DEAD) != 0) {
	- VM_OBJECT_WUNLOCK(object);
	- continue;
	- }
	- if (object->type == OBJT_VNODE) {
	- vm_pagequeue_unlock(pq);
	- vp = object->handle;
	- vm_object_reference_locked(object);
	- VM_OBJECT_WUNLOCK(object);
	- (void)vn_start_write(vp, &mp, V_WAIT);
	- lockmode = MNT_SHARED_WRITES(vp->v_mount) ?
	- LK_SHARED : LK_EXCLUSIVE;
	- vn_lock(vp, lockmode \| LK_RETRY);
	- VM_OBJECT_WLOCK(object);
	- vm_object_page_clean(object, 0, 0, OBJPC_SYNC);
	- VM_OBJECT_WUNLOCK(object);
	- VOP_UNLOCK(vp, 0);
	- vm_object_deallocate(object);
	- vn_finished_write(mp);
	- return (TRUE);
	- } else if (object->type == OBJT_SWAP \|\|
	- object->type == OBJT_DEFAULT) {
	- vm_pagequeue_unlock(pq);
	- m_tmp = m;
	- vm_pageout_flush(&m_tmp, 1, VM_PAGER_PUT_SYNC,
	- 0, NULL, NULL);
	- VM_OBJECT_WUNLOCK(object);
	- return (TRUE);
	- }
	- } else {
	- /*
	- * Dequeue here to prevent lock recursion in
	- * vm_page_cache().
	- */
	- vm_page_dequeue_locked(m);
	- vm_page_cache(m);
	- vm_page_unlock(m);
	- }
	- VM_OBJECT_WUNLOCK(object);
	- }
	- vm_pagequeue_unlock(pq);
	- return (FALSE);
	-}
	-
	-/*
	- * Increase the number of cached pages. The specified value, "tries",
	- * determines which categories of pages are cached:
	- *
	- * 0: All clean, inactive pages within the specified physical address range
	- * are cached. Will not sleep.
	- * 1: The vm_lowmem handlers are called. All inactive pages within
	- * the specified physical address range are cached. May sleep.
	- * 2: The vm_lowmem handlers are called. All inactive and active pages
	- * within the specified physical address range are cached. May sleep.
	- */
	-void
	-vm_pageout_grow_cache(int tries, vm_paddr_t low, vm_paddr_t high)
	-{
	- int actl, actmax, inactl, inactmax, dom, initial_dom;
	- static int start_dom = 0;
	-
	- if (tries > 0) {
	- /*
	- * Decrease registered cache sizes. The vm_lowmem handlers
	- * may acquire locks and/or sleep, so they can only be invoked
	- * when "tries" is greater than zero.
	- */
	- SDT_PROBE0(vm, , , vm__lowmem_cache);
	- EVENTHANDLER_INVOKE(vm_lowmem, 0);
	-
	- /*
	- * We do this explicitly after the caches have been drained
	- * above.
	- */
	- uma_reclaim();
	- }
	-
	- /*
	- * Make the next scan start on the next domain.
	- */
	- initial_dom = atomic_fetchadd_int(&start_dom, 1) % vm_ndomains;
	-
	- inactl = 0;
	- inactmax = vm_cnt.v_inactive_count;
	- actl = 0;
	- actmax = tries < 2 ? 0 : vm_cnt.v_active_count;
	- dom = initial_dom;
	-
	- /*
	- * Scan domains in round-robin order, first inactive queues,
	- * then active. Since domain usually owns large physically
	- * contiguous chunk of memory, it makes sense to completely
	- * exhaust one domain before switching to next, while growing
	- * the pool of contiguous physical pages.
	- *
	- * Do not even start launder a domain which cannot contain
	- * the specified address range, as indicated by segments
	- * constituting the domain.
	- */
	-again_inact:
	- if (inactl < inactmax) {
	- if (vm_phys_domain_intersects(vm_dom[dom].vmd_segs,
	- low, high) &&
	- vm_pageout_launder(&vm_dom[dom].vmd_pagequeues[PQ_INACTIVE],
	- tries, low, high)) {
	- inactl++;
	- goto again_inact;
	- }
	- if (++dom == vm_ndomains)
	- dom = 0;
	- if (dom != initial_dom)
	- goto again_inact;
	- }
	-again_act:
	- if (actl < actmax) {
	- if (vm_phys_domain_intersects(vm_dom[dom].vmd_segs,
	- low, high) &&
	- vm_pageout_launder(&vm_dom[dom].vmd_pagequeues[PQ_ACTIVE],
	- tries, low, high)) {
	- actl++;
	- goto again_act;
	- }
	- if (++dom == vm_ndomains)
	- dom = 0;
	- if (dom != initial_dom)
	- goto again_act;
	- }
	-}
	-
	#if !defined(NO_SWAPPING)
	/*
	* vm_pageout_object_deactivate_pages
	Index: vm/vm_phys.h
	===================================================================
	--- vm/vm_phys.h
	+++ vm/vm_phys.h
	@@ -84,6 +84,8 @@
	void vm_phys_free_pages(vm_page_t m, int order);
	void vm_phys_init(void);
	vm_page_t vm_phys_paddr_to_vm_page(vm_paddr_t pa);
	+vm_page_t vm_phys_scan_contig(u_long npages, vm_paddr_t low, vm_paddr_t high,
	+ u_long alignment, vm_paddr_t boundary, int options);
	void vm_phys_set_pool(int pool, vm_page_t m, int order);
	boolean_t vm_phys_unfree_page(vm_page_t m);
	boolean_t vm_phys_zero_pages_idle(void);
	Index: vm/vm_phys.c
	===================================================================
	--- vm/vm_phys.c
	+++ vm/vm_phys.c
	@@ -1163,6 +1163,56 @@
	}

	/*
	+ * Scan physical memory between the specified addresses "low" and "high" for a
	+ * contiguous set of physical pages that satisfy the specified conditions, and
	+ * return the lowest page in the set. The specified "alignment" determines
	+ * the alignment of the lowest physical page in the set. If the specified
	+ * "boundary" is non-zero, then the set of physical pages cannot span a
	+ * physical address that is a multiple of "boundary".
	+ *
	+ * "npages" must be greater than zero. Both "alignment" and "boundary" must
	+ * be a power of two.
	+ */
	+vm_page_t
	+vm_phys_scan_contig(u_long npages, vm_paddr_t low, vm_paddr_t high,
	+ u_long alignment, vm_paddr_t boundary, int options)
	+{
	+ vm_paddr_t pa_end;
	+ vm_page_t m_end, m_run, m_start;
	+ struct vm_phys_seg *seg;
	+ int segind;
	+
	+ KASSERT(npages > 0, ("npages is 0"));
	+ KASSERT(powerof2(alignment), ("alignment is not a power of 2"));
	+ KASSERT(powerof2(boundary), ("boundary is not a power of 2"));
	+ if (low >= high)
	+ return (NULL);
	+ for (segind = 0; segind < vm_phys_nsegs; segind++) {
	+ seg = &vm_phys_segs[segind];
	+ if (seg->start >= high)
	+ break;
	+ if (low >= seg->end)
	+ continue;
	+ if (low <= seg->start)
	+ m_start = seg->first_page;
	+ else
	+ m_start = &seg->first_page[atop(low - seg->start)];
	+ if (high < seg->end)
	+ pa_end = high;
	+ else
	+ pa_end = seg->end;
	+ if (pa_end - VM_PAGE_TO_PHYS(m_start) < ptoa(npages))
	+ continue;
	+ m_end = &seg->first_page[atop(pa_end - seg->start)];
	+ m_run = vm_page_scan_contig(npages, m_start, m_end,
	+ alignment, boundary, options);
	+ if (m_run != NULL)
	+ return (m_run);
	+ }
	+ return (NULL);
	+}
	+
	+/*
	* Set the pool for a contiguous, power of two-sized set of physical pages.
	*/
	void
	Index: vm/vm_reserv.h
	===================================================================
	--- vm/vm_reserv.h
	+++ vm/vm_reserv.h
	@@ -53,6 +53,8 @@
	void vm_reserv_break_all(vm_object_t object);
	boolean_t vm_reserv_free_page(vm_page_t m);
	void vm_reserv_init(void);
	+bool vm_reserv_is_page_free(vm_page_t m);
	+int vm_reserv_level(vm_page_t m);
	int vm_reserv_level_iffullpop(vm_page_t m);
	boolean_t vm_reserv_reactivate_page(vm_page_t m);
	boolean_t vm_reserv_reclaim_contig(u_long npages, vm_paddr_t low,
	@@ -60,6 +62,7 @@
	boolean_t vm_reserv_reclaim_inactive(void);
	void vm_reserv_rename(vm_page_t m, vm_object_t new_object,
	vm_object_t old_object, vm_pindex_t old_object_offset);
	+int vm_reserv_size(int level);
	vm_paddr_t vm_reserv_startup(vm_offset_t *vaddr, vm_paddr_t end,
	vm_paddr_t high_water);

	Index: vm/vm_reserv.c
	===================================================================
	--- vm/vm_reserv.c
	+++ vm/vm_reserv.c
	@@ -866,6 +866,35 @@
	}

	/*
	+ * Returns true if the given page belongs to a reservation and that page is
	+ * free. Otherwise, returns false.
	+ */
	+bool
	+vm_reserv_is_page_free(vm_page_t m)
	+{
	+ vm_reserv_t rv;
	+
	+ mtx_assert(&vm_page_queue_free_mtx, MA_OWNED);
	+ rv = vm_reserv_from_page(m);
	+ if (rv->object == NULL)
	+ return (false);
	+ return (popmap_is_clear(rv->popmap, m - rv->pages));
	+}
	+
	+/*
	+ * If the given page belongs to a reservation, returns the level of that
	+ * reservation. Otherwise, returns -1.
	+ */
	+int
	+vm_reserv_level(vm_page_t m)
	+{
	+ vm_reserv_t rv;
	+
	+ rv = vm_reserv_from_page(m);
	+ return (rv->object != NULL ? 0 : -1);
	+}
	+
	+/*
	* Returns a reservation level if the given page belongs to a fully-populated
	* reservation and -1 otherwise.
	*/
	@@ -1076,6 +1105,23 @@
	}

	/*
	+ * Returns the size (in bytes) of a reservation of the specified level.
	+ */
	+int
	+vm_reserv_size(int level)
	+{
	+
	+ switch (level) {
	+ case 0:
	+ return (VM_LEVEL_0_SIZE);
	+ case -1:
	+ return (PAGE_SIZE);
	+ default:
	+ return (0);
	+ }
	+}
	+
	+/*
	* Allocates the virtual and physical memory required by the reservation
	* management system's data structures, in particular, the reservation array.
	*/

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