return next_present_section_nr(-1);
}
-/*
- * Record how many memory sections are marked as present
- * during system bootup.
- */
-static int __initdata nr_present_sections;
-
/* Record a memory area against a node. */
void __init memory_present(int nid, unsigned long start, unsigned long end)
{
ms->section_mem_map = sparse_encode_early_nid(nid) |
SECTION_IS_ONLINE;
section_mark_present(ms);
- nr_present_sections++;
}
}
}
}
#endif /* CONFIG_MEMORY_HOTREMOVE */
-static void __init sparse_early_usemaps_alloc_node(void *data,
- unsigned long pnum_begin,
- unsigned long pnum_end,
- unsigned long usemap_count, int nodeid)
-{
- void *usemap;
- unsigned long pnum;
- unsigned long **usemap_map = (unsigned long **)data;
- int size = usemap_size();
- int nr_consumed_maps = 0;
-
- usemap = sparse_early_usemaps_alloc_pgdat_section(NODE_DATA(nodeid),
- size * usemap_count);
- if (!usemap) {
- pr_warn("%s: allocation failed\n", __func__);
- return;
- }
-
- for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
- if (!present_section_nr(pnum))
- continue;
- usemap_map[nr_consumed_maps] = usemap;
- usemap += size;
- check_usemap_section_nr(nodeid, usemap_map[nr_consumed_maps]);
- nr_consumed_maps++;
- }
-}
-
#ifdef CONFIG_SPARSEMEM_VMEMMAP
static unsigned long __init section_map_size(void)
-
{
return ALIGN(sizeof(struct page) * PAGES_PER_SECTION, PMD_SIZE);
}
BOOTMEM_ALLOC_ACCESSIBLE, nid);
return map;
}
-void __init sparse_mem_maps_populate_node(struct page **map_map,
- unsigned long pnum_begin,
- unsigned long pnum_end,
- unsigned long map_count, int nodeid)
-{
- unsigned long pnum;
- int nr_consumed_maps = 0;
-
- for (pnum = pnum_begin; pnum < pnum_end; pnum++) {
- if (!present_section_nr(pnum))
- continue;
- map_map[nr_consumed_maps] =
- sparse_mem_map_populate(pnum, nodeid, NULL);
- if (map_map[nr_consumed_maps++])
- continue;
- pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
- __func__);
- }
-}
#endif /* !CONFIG_SPARSEMEM_VMEMMAP */
static void *sparsemap_buf __meminitdata;
return ptr;
}
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
-static void __init sparse_early_mem_maps_alloc_node(void *data,
- unsigned long pnum_begin,
- unsigned long pnum_end,
- unsigned long map_count, int nodeid)
-{
- struct page **map_map = (struct page **)data;
-
- sparse_buffer_init(section_map_size() * map_count, nodeid);
- sparse_mem_maps_populate_node(map_map, pnum_begin, pnum_end,
- map_count, nodeid);
- sparse_buffer_fini();
-}
-#else
-static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
-{
- struct page *map;
- struct mem_section *ms = __nr_to_section(pnum);
- int nid = sparse_early_nid(ms);
-
- map = sparse_mem_map_populate(pnum, nid, NULL);
- if (map)
- return map;
-
- pr_err("%s: sparsemem memory map backing failed some memory will not be available\n",
- __func__);
- return NULL;
-}
-#endif
-
void __weak __meminit vmemmap_populate_print_last(void)
{
}
-/**
- * alloc_usemap_and_memmap - memory alloction for pageblock flags and vmemmap
- * @map: usemap_map for pageblock flags or mmap_map for vmemmap
- * @unit_size: size of map unit
- */
-static void __init alloc_usemap_and_memmap(void (*alloc_func)
- (void *, unsigned long, unsigned long,
- unsigned long, int), void *data,
- int data_unit_size)
-{
- unsigned long pnum;
- unsigned long map_count;
- int nodeid_begin = 0;
- unsigned long pnum_begin = 0;
-
- for_each_present_section_nr(0, pnum) {
- struct mem_section *ms;
-
- ms = __nr_to_section(pnum);
- nodeid_begin = sparse_early_nid(ms);
- pnum_begin = pnum;
- break;
- }
- map_count = 1;
- for_each_present_section_nr(pnum_begin + 1, pnum) {
- struct mem_section *ms;
- int nodeid;
-
- ms = __nr_to_section(pnum);
- nodeid = sparse_early_nid(ms);
- if (nodeid == nodeid_begin) {
- map_count++;
- continue;
- }
- /* ok, we need to take cake of from pnum_begin to pnum - 1*/
- alloc_func(data, pnum_begin, pnum,
- map_count, nodeid_begin);
- /* new start, update count etc*/
- nodeid_begin = nodeid;
- pnum_begin = pnum;
- data += map_count * data_unit_size;
- map_count = 1;
- }
- /* ok, last chunk */
- alloc_func(data, pnum_begin, __highest_present_section_nr+1,
- map_count, nodeid_begin);
-}
-
-/*
- * Allocate the accumulated non-linear sections, allocate a mem_map
- * for each and record the physical to section mapping.
- */
-void __init sparse_init(void)
-{
- unsigned long pnum;
- struct page *map;
- unsigned long *usemap;
- unsigned long **usemap_map;
- int size;
- int nr_consumed_maps = 0;
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
- int size2;
- struct page **map_map;
-#endif
-
- /* see include/linux/mmzone.h 'struct mem_section' definition */
- BUILD_BUG_ON(!is_power_of_2(sizeof(struct mem_section)));
-
- /* Setup pageblock_order for HUGETLB_PAGE_SIZE_VARIABLE */
- set_pageblock_order();
-
- /*
- * map is using big page (aka 2M in x86 64 bit)
- * usemap is less one page (aka 24 bytes)
- * so alloc 2M (with 2M align) and 24 bytes in turn will
- * make next 2M slip to one more 2M later.
- * then in big system, the memory will have a lot of holes...
- * here try to allocate 2M pages continuously.
- *
- * powerpc need to call sparse_init_one_section right after each
- * sparse_early_mem_map_alloc, so allocate usemap_map at first.
- */
- size = sizeof(unsigned long *) * nr_present_sections;
- usemap_map = memblock_virt_alloc(size, 0);
- if (!usemap_map)
- panic("can not allocate usemap_map\n");
- alloc_usemap_and_memmap(sparse_early_usemaps_alloc_node,
- (void *)usemap_map,
- sizeof(usemap_map[0]));
-
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
- size2 = sizeof(struct page *) * nr_present_sections;
- map_map = memblock_virt_alloc(size2, 0);
- if (!map_map)
- panic("can not allocate map_map\n");
- alloc_usemap_and_memmap(sparse_early_mem_maps_alloc_node,
- (void *)map_map,
- sizeof(map_map[0]));
-#endif
-
- /*
- * The number of present sections stored in nr_present_sections
- * are kept the same since mem sections are marked as present in
- * memory_present(). In this for loop, we need check which sections
- * failed to allocate memmap or usemap, then clear its
- * ->section_mem_map accordingly. During this process, we need
- * increase 'nr_consumed_maps' whether its allocation of memmap
- * or usemap failed or not, so that after we handle the i-th
- * memory section, can get memmap and usemap of (i+1)-th section
- * correctly.
- */
- for_each_present_section_nr(0, pnum) {
- struct mem_section *ms;
-
- if (nr_consumed_maps >= nr_present_sections) {
- pr_err("nr_consumed_maps goes beyond nr_present_sections\n");
- break;
- }
- ms = __nr_to_section(pnum);
- usemap = usemap_map[nr_consumed_maps];
- if (!usemap) {
- ms->section_mem_map = 0;
- nr_consumed_maps++;
- continue;
- }
-
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
- map = map_map[nr_consumed_maps];
-#else
- map = sparse_early_mem_map_alloc(pnum);
-#endif
- if (!map) {
- ms->section_mem_map = 0;
- nr_consumed_maps++;
- continue;
- }
-
- sparse_init_one_section(__nr_to_section(pnum), pnum, map,
- usemap);
- nr_consumed_maps++;
- }
-
- vmemmap_populate_print_last();
-
-#ifdef CONFIG_SPARSEMEM_ALLOC_MEM_MAP_TOGETHER
- memblock_free_early(__pa(map_map), size2);
-#endif
- memblock_free_early(__pa(usemap_map), size);
-}
-
/*
* Initialize sparse on a specific node. The node spans [pnum_begin, pnum_end)
* And number of present sections in this node is map_count.
* Allocate the accumulated non-linear sections, allocate a mem_map
* for each and record the physical to section mapping.
*/
-void __init new_sparse_init(void)
+void __init sparse_init(void)
{
unsigned long pnum_begin = first_present_section_nr();
int nid_begin = sparse_early_nid(__nr_to_section(pnum_begin));
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