49 		struct zone *zone;  in mminit_verify_zonelist()  local
57 			/* Identify the zone and nodelist */  in mminit_verify_zonelist()
61 			zone = &pgdat->node_zones[zoneid];  in mminit_verify_zonelist()
62 			if (!populated_zone(zone))  in mminit_verify_zonelist()
68 				zone->name);  in mminit_verify_zonelist()
71 			for_each_zone_zonelist(zone, z, zonelist, zoneid)  in mminit_verify_zonelist()
72 				pr_cont("%d:%s ", zone_to_nid(zone), zone->name);  in mminit_verify_zonelist()
87 		"Section %d Node %d Zone %d Lastcpupid %d Kasantag %d Gen %d Tier %d Flags %d\n",  in mminit_verify_pageflags_layout()
97 		"Section %d Node %d Zone %d Lastcpupid %d Kasantag %d\n",  in mminit_verify_pageflags_layout()
104 		"Section %lu Node %lu Zone %lu Lastcpupid %lu Kasantag %lu\n",  in mminit_verify_pageflags_layout()
111 		"Node/Zone ID: %lu -> %lu\n",  in mminit_verify_pageflags_layout()
294  * Sum pages in active regions for movable zone.
314  * This finds a zone that can be used for ZONE_MOVABLE pages. The
316  * increasing memory addresses so that the "highest" populated zone is used
335  * Find the PFN the Movable zone begins in each node. Kernel memory
565 				unsigned long zone, int nid)  in __init_single_page()  argument
568 	set_page_links(page, zone, nid, pfn);  in __init_single_page()
577 	if (!is_highmem_idx(zone))  in __init_single_page()
679 	 * prev_end_pfn static that contains the end of previous zone  in defer_init()
717 		struct zone *zone = &pgdat->node_zones[zid];  in init_reserved_page()  local
719 		if (zone_spans_pfn(zone, pfn))  in init_reserved_page()
773 /* If zone is ZONE_MOVABLE but memory is mirrored, it is an overlapped init */
775 overlap_memmap_init(unsigned long zone, unsigned long *pfn)  in overlap_memmap_init()  argument
779 	if (mirrored_kernelcore && zone == ZONE_MOVABLE) {  in overlap_memmap_init()
811  * - zone and node links point to zone and node that span the page if the
812  *   hole is in the middle of a zone
813  * - zone and node links point to adjacent zone/node if the hole falls on
814  *   the zone boundary; the pages in such holes will be prepended to the
815  *   zone/node above the hole except for the trailing pages in the last
816  *   section that will be appended to the zone/node below.
820 					  int zone, int node)  in init_unavailable_range()  argument
830 		__init_single_page(pfn_to_page(pfn), pfn, zone, node);  in init_unavailable_range()
836 		pr_info("On node %d, zone %s: %lld pages in unavailable ranges\n",  in init_unavailable_range()
837 			node, zone_names[zone], pgcnt);  in init_unavailable_range()
847  * zone stats (e.g., nr_isolate_pageblock) are touched.
849 void __meminit memmap_init_range(unsigned long size, int nid, unsigned long zone,  in memmap_init_range()  argument
868 	if (zone == ZONE_DEVICE) {  in memmap_init_range()
884 			if (overlap_memmap_init(zone, &pfn))  in memmap_init_range()
893 		__init_single_page(page, pfn, zone, nid);  in memmap_init_range()
910 static void __init memmap_init_zone_range(struct zone *zone,  in memmap_init_zone_range()  argument
915 	unsigned long zone_start_pfn = zone->zone_start_pfn;  in memmap_init_zone_range()
916 	unsigned long zone_end_pfn = zone_start_pfn + zone->spanned_pages;  in memmap_init_zone_range()
917 	int nid = zone_to_nid(zone), zone_id = zone_idx(zone);  in memmap_init_zone_range()
944 			struct zone *zone = node->node_zones + j;  in memmap_init()  local
946 			if (!populated_zone(zone))  in memmap_init()
949 			memmap_init_zone_range(zone, start_pfn, end_pfn,  in memmap_init()
959 	 * Append the pages in this hole to the highest zone in the last  in memmap_init()
981 	 * phase for it to be fully associated with a zone.  in __init_zone_device_page()
1064 void __ref memmap_init_zone_device(struct zone *zone,  in memmap_init_zone_device()  argument
1070 	struct pglist_data *pgdat = zone->zone_pgdat;  in memmap_init_zone_device()
1073 	unsigned long zone_idx = zone_idx(zone);  in memmap_init_zone_device()
1108  * The zone ranges provided by the architecture do not include ZONE_MOVABLE
1112  * is distributed. This helper function adjusts the zone ranges
1114  * highest usable zone for ZONE_MOVABLE. This preserves the assumption that
1176 /* Return the number of page frames in holes in a zone on a node */
1184 	/* zone is empty, we don't have any absent pages */  in zone_absent_pages_in_node()
1219  * Return the number of pages a zone spans in a node, including holes
1232 	/* Get the start and end of the zone */  in zone_spanned_pages_in_node()
1238 	/* Check that this node has pages within the zone's required range */  in zone_spanned_pages_in_node()
1242 	/* Move the zone boundaries inside the node if necessary */  in zone_spanned_pages_in_node()
1252 	struct zone *z;  in reset_memoryless_node_totalpages()
1276 		struct zone *zone = pgdat->node_zones + i;  in calculate_node_totalpages()  local
1293 			zone->zone_start_pfn = zone_start_pfn;  in calculate_node_totalpages()
1295 			zone->zone_start_pfn = 0;  in calculate_node_totalpages()
1296 		zone->spanned_pages = spanned;  in calculate_node_totalpages()
1297 		zone->present_pages = real_size;  in calculate_node_totalpages()
1299 		zone->present_early_pages = real_size;  in calculate_node_totalpages()
1318 	 * the zone and SPARSEMEM is in use. If there are holes within the  in calc_memmap_size()
1319 	 * zone, each populated memory region may cost us one or two extra  in calc_memmap_size()
1373 static void __meminit zone_init_internals(struct zone *zone, enum zone_type idx, int nid,  in zone_init_internals()  argument
1376 	atomic_long_set(&zone->managed_pages, remaining_pages);  in zone_init_internals()
1377 	zone_set_nid(zone, nid);  in zone_init_internals()
1378 	zone->name = zone_names[idx];  in zone_init_internals()
1379 	zone->zone_pgdat = NODE_DATA(nid);  in zone_init_internals()
1380 	spin_lock_init(&zone->lock);  in zone_init_internals()
1381 	zone_seqlock_init(zone);  in zone_init_internals()
1382 	zone_pcp_init(zone);  in zone_init_internals()
1385 static void __meminit zone_init_free_lists(struct zone *zone)  in zone_init_free_lists()  argument
1389 		INIT_LIST_HEAD(&zone->free_area[order].free_list[t]);  in zone_init_free_lists()
1390 		zone->free_area[order].nr_free = 0;  in zone_init_free_lists()
1394 	INIT_LIST_HEAD(&zone->unaccepted_pages);  in zone_init_free_lists()
1398 void __meminit init_currently_empty_zone(struct zone *zone,  in init_currently_empty_zone()  argument
1402 	struct pglist_data *pgdat = zone->zone_pgdat;  in init_currently_empty_zone()
1403 	int zone_idx = zone_idx(zone) + 1;  in init_currently_empty_zone()
1408 	zone->zone_start_pfn = zone_start_pfn;  in init_currently_empty_zone()
1411 			"Initialising map node %d zone %lu pfns %lu -> %lu\n",  in init_currently_empty_zone()
1413 			(unsigned long)zone_idx(zone),  in init_currently_empty_zone()
1416 	zone_init_free_lists(zone);  in init_currently_empty_zone()
1417 	zone->initialized = 1;  in init_currently_empty_zone()
1422  * Calculate the size of the zone->blockflags rounded to an unsigned long
1441 static void __ref setup_usemap(struct zone *zone)  in setup_usemap()  argument
1443 	unsigned long usemapsize = usemap_size(zone->zone_start_pfn,  in setup_usemap()
1444 					       zone->spanned_pages);  in setup_usemap()
1445 	zone->pageblock_flags = NULL;  in setup_usemap()
1447 		zone->pageblock_flags =  in setup_usemap()
1449 					    zone_to_nid(zone));  in setup_usemap()
1450 		if (!zone->pageblock_flags)  in setup_usemap()
1451 			panic("Failed to allocate %ld bytes for zone %s pageblock flags on node %d\n",  in setup_usemap()
1452 			      usemapsize, zone->name, zone_to_nid(zone));  in setup_usemap()
1456 static inline void setup_usemap(struct zone *zone) {}  in setup_usemap()  argument
1495  * Set up the zone data structures
1537 		struct zone *zone = pgdat->node_zones + z;  in free_area_init_core_hotplug()  local
1539 		zone->present_pages = 0;  in free_area_init_core_hotplug()
1540 		zone_init_internals(zone, z, nid, 0);  in free_area_init_core_hotplug()
1546  * Set up the zone data structures:
1563 		struct zone *zone = pgdat->node_zones + j;  in free_area_init_core()  local
1566 		size = zone->spanned_pages;  in free_area_init_core()
1567 		freesize = zone->present_pages;  in free_area_init_core()
1571 		 * is used by this zone for memmap. This affects the watermark  in free_area_init_core()
1579 					pr_debug("  %s zone: %lu pages used for memmap\n",  in free_area_init_core()
1582 				pr_warn("  %s zone: %lu memmap pages exceeds freesize %lu\n",  in free_area_init_core()
1589 			pr_debug("  %s zone: %lu pages reserved\n", zone_names[0], dma_reserve);  in free_area_init_core()
1604 		zone_init_internals(zone, j, nid, freesize);  in free_area_init_core()
1609 		setup_usemap(zone);  in free_area_init_core()
1610 		init_currently_empty_zone(zone, zone->zone_start_pfn, size);  in free_area_init_core()
1647 		 * The zone's endpoints aren't required to be MAX_PAGE_ORDER  in alloc_node_mem_map()
1743 		struct zone *zone = &pgdat->node_zones[zone_type];  in check_for_memory()  local
1744 		if (populated_zone(zone)) {  in check_for_memory()
1777  * free_area_init - Initialise all pg_data_t and zone data
1778  * @max_zone_pfn: an array of max PFNs for each zone
1782  * zone in each node and their holes is calculated. If the maximum PFN
1783  * between two adjacent zones match, it is assumed that the zone is empty.
1785  * that arch_max_dma32_pfn has no pages. It is also assumed that a zone
1792 	int i, nid, zone;  in free_area_init()  local
1795 	/* Record where the zone boundaries are */  in free_area_init()
1806 			zone = MAX_NR_ZONES - i - 1;  in free_area_init()
1808 			zone = i;  in free_area_init()
1810 		if (zone == ZONE_MOVABLE)  in free_area_init()
1813 		end_pfn = max(max_zone_pfn[zone], start_pfn);  in free_area_init()
1814 		arch_zone_lowest_possible_pfn[zone] = start_pfn;  in free_area_init()
1815 		arch_zone_highest_possible_pfn[zone] = end_pfn;  in free_area_init()
1824 	/* Print out the zone ranges */  in free_area_init()
1825 	pr_info("Zone ranges:\n");  in free_area_init()
1842 	pr_info("Movable zone start for each node\n");  in free_area_init()
2039 static unsigned long  __init deferred_init_pages(struct zone *zone,  in deferred_init_pages()  argument
2043 	int nid = zone_to_nid(zone);  in deferred_init_pages()
2045 	int zid = zone_idx(zone);  in deferred_init_pages()
2064  * This function is meant to pre-load the iterator for the zone init.
2070 deferred_init_mem_pfn_range_in_zone(u64 *i, struct zone *zone,  in deferred_init_mem_pfn_range_in_zone()  argument
2077 	 * Start out by walking through the ranges in this zone that have  in deferred_init_mem_pfn_range_in_zone()
2081 	for_each_free_mem_pfn_range_in_zone(j, zone, spfn, epfn) {  in deferred_init_mem_pfn_range_in_zone()
2104 deferred_init_maxorder(u64 *i, struct zone *zone, unsigned long *start_pfn,  in deferred_init_maxorder()  argument
2113 	for_each_free_mem_pfn_range_in_zone_from(j, zone, start_pfn, end_pfn) {  in deferred_init_maxorder()
2120 		nr_pages += deferred_init_pages(zone, *start_pfn, t);  in deferred_init_maxorder()
2131 	for_each_free_mem_pfn_range_in_zone_from(j, zone, &spfn, &epfn) {  in deferred_init_maxorder()
2152 	struct zone *zone = arg;  in deferred_init_memmap_chunk()  local
2155 	deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn, start_pfn);  in deferred_init_memmap_chunk()
2162 		deferred_init_maxorder(&i, zone, &spfn, &epfn);  in deferred_init_memmap_chunk()
2182 	struct zone *zone;  in deferred_init_memmap()  local
2204 	 * Once we unlock here, the zone cannot be grown anymore, thus if an  in deferred_init_memmap()
2205 	 * interrupt thread must allocate this early in boot, zone must be  in deferred_init_memmap()
2210 	/* Only the highest zone is deferred so find it */  in deferred_init_memmap()
2212 		zone = pgdat->node_zones + zid;  in deferred_init_memmap()
2213 		if (first_init_pfn < zone_end_pfn(zone))  in deferred_init_memmap()
2217 	/* If the zone is empty somebody else may have cleared out the zone */  in deferred_init_memmap()
2218 	if (!deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,  in deferred_init_memmap()
2228 			.fn_arg      = zone,  in deferred_init_memmap()
2237 		deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,  in deferred_init_memmap()
2241 	/* Sanity check that the next zone really is unpopulated */  in deferred_init_memmap()
2242 	WARN_ON(++zid < MAX_NR_ZONES && populated_zone(++zone));  in deferred_init_memmap()
2252  * If this zone has deferred pages, try to grow it by initializing enough
2258  * Return true when zone was grown, otherwise return false. We return true even
2266 bool __init deferred_grow_zone(struct zone *zone, unsigned int order)  in deferred_grow_zone()  argument
2269 	pg_data_t *pgdat = zone->zone_pgdat;  in deferred_grow_zone()
2275 	/* Only the last zone may have deferred pages */  in deferred_grow_zone()
2276 	if (zone_end_pfn(zone) != pgdat_end_pfn(pgdat))  in deferred_grow_zone()
2282 	 * If someone grew this zone while we were waiting for spinlock, return  in deferred_grow_zone()
2290 	/* If the zone is empty somebody else may have cleared out the zone */  in deferred_grow_zone()
2291 	if (!deferred_init_mem_pfn_range_in_zone(&i, zone, &spfn, &epfn,  in deferred_grow_zone()
2308 		nr_pages += deferred_init_maxorder(&i, zone, &spfn, &epfn);  in deferred_grow_zone()
2348 void set_zone_contiguous(struct zone *zone)  in set_zone_contiguous()  argument
2350 	unsigned long block_start_pfn = zone->zone_start_pfn;  in set_zone_contiguous()
2354 	for (; block_start_pfn < zone_end_pfn(zone);  in set_zone_contiguous()
2358 		block_end_pfn = min(block_end_pfn, zone_end_pfn(zone));  in set_zone_contiguous()
2361 					     block_end_pfn, zone))  in set_zone_contiguous()
2367 	zone->contiguous = true;  in set_zone_contiguous()
2372 	struct zone *zone;  in page_alloc_init_late()  local
2404 	for_each_populated_zone(zone)  in page_alloc_init_late()
2405 		set_zone_contiguous(zone);  in page_alloc_init_late()
2550  * set_dma_reserve - set the specified number of pages reserved in the first zone
2553  * The per-cpu batchsize and zone watermarks are determined by managed_pages.
2554  * In the DMA zone, a significant percentage may be consumed by kernel image
2557  * first zone (e.g., ZONE_DMA). The effect will be lower watermarks and