Function vm_reserv_init

freebsd/vm/vm_reserv.c:1063–1122

* Initializes the reservation management system. Specifically, initializes * the reservation array. * * Requires that vm_page_array and first_page are initialized! */

 * Requires that vm_page_array and first_page are initialized!
 */
void
vm_reserv_init(void)
{
	vm_paddr_t paddr;
	struct vm_phys_seg *seg;
	struct vm_reserv *rv;
	struct vm_reserv_domain *rvd;
#ifdef VM_PHYSSEG_SPARSE
	vm_pindex_t used;
#endif
	int i, j, segind;

	/*
	 * Initialize the reservation array.  Specifically, initialize the
	 * "pages" field for every element that has an underlying superpage.
	 */
#ifdef VM_PHYSSEG_SPARSE
	used = 0;
#endif
	for (segind = 0; segind < vm_phys_nsegs; segind++) {
		seg = &vm_phys_segs[segind];
#ifdef VM_PHYSSEG_SPARSE
		seg->first_reserv = &vm_reserv_array[used];
		used += howmany(seg->end, VM_LEVEL_0_SIZE) -
		    seg->start / VM_LEVEL_0_SIZE;
#else
		seg->first_reserv =
		    &vm_reserv_array[seg->start >> VM_LEVEL_0_SHIFT];
#endif
		paddr = roundup2(seg->start, VM_LEVEL_0_SIZE);
		rv = seg->first_reserv + (paddr >> VM_LEVEL_0_SHIFT) -
		    (seg->start >> VM_LEVEL_0_SHIFT);
		while (paddr + VM_LEVEL_0_SIZE > paddr && paddr +
		    VM_LEVEL_0_SIZE <= seg->end) {
			rv->pages = PHYS_TO_VM_PAGE(paddr);
			rv->domain = seg->domain;
			mtx_init(&rv->lock, "vm reserv", NULL, MTX_DEF);
			paddr += VM_LEVEL_0_SIZE;
			rv++;
		}
	}
	for (i = 0; i < MAXMEMDOM; i++) {
		rvd = &vm_rvd[i];
		mtx_init(&rvd->lock, "vm reserv domain", NULL, MTX_DEF);
		TAILQ_INIT(&rvd->partpop);
		mtx_init(&rvd->marker.lock, "vm reserv marker", NULL, MTX_DEF);

		/*
		 * Fully populated reservations should never be present in the
		 * partially populated reservation queues.
		 */
		rvd->marker.popcnt = VM_LEVEL_0_NPAGES;
		for (j = 0; j < NBPOPMAP; j++)
			popmap_set(rvd->marker.popmap, j);
	}

	for (i = 0; i < VM_RESERV_OBJ_LOCK_COUNT; i++)
		mtx_init(&vm_reserv_object_mtx[i], "resv obj lock", NULL,