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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 | /* * mm_init.c - Memory initialisation verification and debugging * * Copyright 2008 IBM Corporation, 2008 * Author Mel Gorman <mel@csn.ul.ie> * */ #include <linux/kernel.h> #include <linux/init.h> #include <linux/kobject.h> #include <linux/module.h> #include "internal.h" #ifdef CONFIG_DEBUG_MEMORY_INIT int mminit_loglevel; #ifndef SECTIONS_SHIFT #define SECTIONS_SHIFT 0 #endif /* The zonelists are simply reported, validation is manual. */ void mminit_verify_zonelist(void) { int nid; if (mminit_loglevel < MMINIT_VERIFY) return; for_each_online_node(nid) { pg_data_t *pgdat = NODE_DATA(nid); struct zone *zone; struct zoneref *z; struct zonelist *zonelist; int i, listid, zoneid; BUG_ON(MAX_ZONELISTS > 2); for (i = 0; i < MAX_ZONELISTS * MAX_NR_ZONES; i++) { /* Identify the zone and nodelist */ zoneid = i % MAX_NR_ZONES; listid = i / MAX_NR_ZONES; zonelist = &pgdat->node_zonelists[listid]; zone = &pgdat->node_zones[zoneid]; if (!populated_zone(zone)) continue; /* Print information about the zonelist */ printk(KERN_DEBUG "mminit::zonelist %s %d:%s = ", listid > 0 ? "thisnode" : "general", nid, zone->name); /* Iterate the zonelist */ for_each_zone_zonelist(zone, z, zonelist, zoneid) { #ifdef CONFIG_NUMA printk(KERN_CONT "%d:%s ", zone->node, zone->name); #else printk(KERN_CONT "0:%s ", zone->name); #endif /* CONFIG_NUMA */ } printk(KERN_CONT "\n"); } } } void __init mminit_verify_pageflags_layout(void) { int shift, width; unsigned long or_mask, add_mask; shift = 8 * sizeof(unsigned long); width = shift - SECTIONS_WIDTH - NODES_WIDTH - ZONES_WIDTH; mminit_dprintk(MMINIT_TRACE, "pageflags_layout_widths", "Section %d Node %d Zone %d Flags %d\n", SECTIONS_WIDTH, NODES_WIDTH, ZONES_WIDTH, NR_PAGEFLAGS); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_shifts", "Section %d Node %d Zone %d\n", SECTIONS_SHIFT, NODES_SHIFT, ZONES_SHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_offsets", "Section %lu Node %lu Zone %lu\n", (unsigned long)SECTIONS_PGSHIFT, (unsigned long)NODES_PGSHIFT, (unsigned long)ZONES_PGSHIFT); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_zoneid", "Zone ID: %lu -> %lu\n", (unsigned long)ZONEID_PGOFF, (unsigned long)(ZONEID_PGOFF + ZONEID_SHIFT)); mminit_dprintk(MMINIT_TRACE, "pageflags_layout_usage", "location: %d -> %d unused %d -> %d flags %d -> %d\n", shift, width, width, NR_PAGEFLAGS, NR_PAGEFLAGS, 0); #ifdef NODE_NOT_IN_PAGE_FLAGS mminit_dprintk(MMINIT_TRACE, "pageflags_layout_nodeflags", "Node not in page flags"); #endif if (SECTIONS_WIDTH) { shift -= SECTIONS_WIDTH; BUG_ON(shift != SECTIONS_PGSHIFT); } if (NODES_WIDTH) { shift -= NODES_WIDTH; BUG_ON(shift != NODES_PGSHIFT); } if (ZONES_WIDTH) { shift -= ZONES_WIDTH; BUG_ON(shift != ZONES_PGSHIFT); } /* Check for bitmask overlaps */ or_mask = (ZONES_MASK << ZONES_PGSHIFT) | (NODES_MASK << NODES_PGSHIFT) | (SECTIONS_MASK << SECTIONS_PGSHIFT); add_mask = (ZONES_MASK << ZONES_PGSHIFT) + (NODES_MASK << NODES_PGSHIFT) + (SECTIONS_MASK << SECTIONS_PGSHIFT); BUG_ON(or_mask != add_mask); } void __meminit mminit_verify_page_links(struct page *page, enum zone_type zone, unsigned long nid, unsigned long pfn) { BUG_ON(page_to_nid(page) != nid); BUG_ON(page_zonenum(page) != zone); BUG_ON(page_to_pfn(page) != pfn); } static __init int set_mminit_loglevel(char *str) { get_option(&str, &mminit_loglevel); return 0; } early_param("mminit_loglevel", set_mminit_loglevel); #endif /* CONFIG_DEBUG_MEMORY_INIT */ struct kobject *mm_kobj; EXPORT_SYMBOL_GPL(mm_kobj); static int __init mm_sysfs_init(void) { mm_kobj = kobject_create_and_add("mm", kernel_kobj); if (!mm_kobj) return -ENOMEM; return 0; } __initcall(mm_sysfs_init); |