void __init set_highmem_pages_init(void) { struct zone *zone; int nid; /* * Explicitly reset zone->managed_pages because set_highmem_pages_init() * is invoked before free_all_bootmem() */ reset_all_zones_managed_pages(); for_each_zone(zone) { unsigned long zone_start_pfn, zone_end_pfn; if (!is_highmem(zone)) continue; zone_start_pfn = zone->zone_start_pfn; zone_end_pfn = zone_start_pfn + zone->spanned_pages; nid = zone_to_nid(zone); printk(KERN_INFO "Initializing %s for node %d (%08lx:%08lx)\n", zone->name, nid, zone_start_pfn, zone_end_pfn); add_highpages_with_active_regions(nid, zone_start_pfn, zone_end_pfn); } }
/** * free_all_bootmem - release free pages to the buddy allocator * * Return: the number of pages actually released. */ unsigned long __init free_all_bootmem(void) { unsigned long pages; reset_all_zones_managed_pages(); pages = free_low_memory_core_early(); totalram_pages += pages; return pages; }
/* * mem_init - initializes memory * * Frees up bootmem * Calculates and displays memory available/used */ void __init mem_init(void) { #ifdef CONFIG_HIGHMEM unsigned long tmp; reset_all_zones_managed_pages(); for (tmp = min_high_pfn; tmp < max_pfn; tmp++) free_highmem_page(pfn_to_page(tmp)); #endif free_all_bootmem(); mem_init_print_info(NULL); }
/** * free_all_bootmem - release free pages to the buddy allocator * * Returns the number of pages actually released. */ unsigned long __init free_all_bootmem(void) { unsigned long pages; reset_all_zones_managed_pages(); /* * We need to use NUMA_NO_NODE instead of NODE_DATA(0)->node_id * because in some case like Node0 doesn't have RAM installed * low ram will be on Node1 */ pages = free_low_memory_core_early(); totalram_pages += pages; return pages; }
static void __init free_highpages(void) { unsigned long max_low = max_low_pfn; struct memblock_region *mem, *res; reset_all_zones_managed_pages(); /* set highmem page free */ for_each_memblock(memory, mem) { unsigned long start = memblock_region_memory_base_pfn(mem); unsigned long end = memblock_region_memory_end_pfn(mem); /* Ignore complete lowmem entries */ if (end <= max_low) continue; if (memblock_is_nomap(mem)) continue; /* Truncate partial highmem entries */ if (start < max_low) start = max_low; /* Find and exclude any reserved regions */ for_each_memblock(reserved, res) { unsigned long res_start, res_end; res_start = memblock_region_reserved_base_pfn(res); res_end = memblock_region_reserved_end_pfn(res); if (res_end < start) continue; if (res_start < start) res_start = start; if (res_start > end) res_start = end; if (res_end > end) res_end = end; if (res_start != start) free_area_high(start, res_start); start = res_end; if (start == end) break; }
void __init mem_init(void) { #ifdef CONFIG_HIGHMEM unsigned long tmp; reset_all_zones_managed_pages(); for (tmp = max_low_pfn; tmp < max_pfn; tmp++) free_highmem_page(pfn_to_page(tmp)); #endif max_mapnr = max_pfn - ARCH_PFN_OFFSET; high_memory = (void *)__va(max_low_pfn << PAGE_SHIFT); free_all_bootmem(); mem_init_print_info(NULL); pr_info("virtual kernel memory layout:\n" #ifdef CONFIG_KASAN " kasan : 0x%08lx - 0x%08lx (%5lu MB)\n" #endif #ifdef CONFIG_MMU " vmalloc : 0x%08lx - 0x%08lx (%5lu MB)\n" #endif #ifdef CONFIG_HIGHMEM " pkmap : 0x%08lx - 0x%08lx (%5lu kB)\n" " fixmap : 0x%08lx - 0x%08lx (%5lu kB)\n" #endif " lowmem : 0x%08lx - 0x%08lx (%5lu MB)\n" " .text : 0x%08lx - 0x%08lx (%5lu kB)\n" " .rodata : 0x%08lx - 0x%08lx (%5lu kB)\n" " .data : 0x%08lx - 0x%08lx (%5lu kB)\n" " .init : 0x%08lx - 0x%08lx (%5lu kB)\n" " .bss : 0x%08lx - 0x%08lx (%5lu kB)\n", #ifdef CONFIG_KASAN KASAN_SHADOW_START, KASAN_SHADOW_START + KASAN_SHADOW_SIZE, KASAN_SHADOW_SIZE >> 20, #endif #ifdef CONFIG_MMU VMALLOC_START, VMALLOC_END, (VMALLOC_END - VMALLOC_START) >> 20, #ifdef CONFIG_HIGHMEM PKMAP_BASE, PKMAP_BASE + LAST_PKMAP * PAGE_SIZE, (LAST_PKMAP*PAGE_SIZE) >> 10, FIXADDR_START, FIXADDR_TOP, (FIXADDR_TOP - FIXADDR_START) >> 10, #endif PAGE_OFFSET, PAGE_OFFSET + (max_low_pfn - min_low_pfn) * PAGE_SIZE, #else min_low_pfn * PAGE_SIZE, max_low_pfn * PAGE_SIZE, #endif ((max_low_pfn - min_low_pfn) * PAGE_SIZE) >> 20, (unsigned long)_text, (unsigned long)_etext, (unsigned long)(_etext - _text) >> 10, (unsigned long)__start_rodata, (unsigned long)_sdata, (unsigned long)(_sdata - __start_rodata) >> 10, (unsigned long)_sdata, (unsigned long)_edata, (unsigned long)(_edata - _sdata) >> 10, (unsigned long)__init_begin, (unsigned long)__init_end, (unsigned long)(__init_end - __init_begin) >> 10, (unsigned long)__bss_start, (unsigned long)__bss_stop, (unsigned long)(__bss_stop - __bss_start) >> 10); }