diff options
Diffstat (limited to 'mm/sparse.c')
| -rw-r--r-- | mm/sparse.c | 57 |
1 files changed, 30 insertions, 27 deletions
diff --git a/mm/sparse.c b/mm/sparse.c index aed0951b87fa..dc38539f8560 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -14,7 +14,7 @@ #include <linux/swap.h> #include <linux/swapops.h> #include <linux/bootmem_info.h> - +#include <linux/vmstat.h> #include "internal.h" #include <asm/dma.h> @@ -129,7 +129,7 @@ static inline int sparse_early_nid(struct mem_section *section) static void __meminit mminit_validate_memmodel_limits(unsigned long *start_pfn, unsigned long *end_pfn) { - unsigned long max_sparsemem_pfn = 1UL << (MAX_PHYSMEM_BITS-PAGE_SHIFT); + unsigned long max_sparsemem_pfn = (PHYSMEM_END + 1) >> PAGE_SHIFT; /* * Sanity checks - do not allow an architecture to pass @@ -192,13 +192,10 @@ static void subsection_mask_set(unsigned long *map, unsigned long pfn, void __init subsection_map_init(unsigned long pfn, unsigned long nr_pages) { - int end_sec = pfn_to_section_nr(pfn + nr_pages - 1); - unsigned long nr, start_sec = pfn_to_section_nr(pfn); - - if (!nr_pages) - return; + int end_sec_nr = pfn_to_section_nr(pfn + nr_pages - 1); + unsigned long nr, start_sec_nr = pfn_to_section_nr(pfn); - for (nr = start_sec; nr <= end_sec; nr++) { + for (nr = start_sec_nr; nr <= end_sec_nr; nr++) { struct mem_section *ms; unsigned long pfns; @@ -226,33 +223,20 @@ static void __init memory_present(int nid, unsigned long start, unsigned long en { unsigned long pfn; -#ifdef CONFIG_SPARSEMEM_EXTREME - if (unlikely(!mem_section)) { - unsigned long size, align; - - size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; - align = 1 << (INTERNODE_CACHE_SHIFT); - mem_section = memblock_alloc(size, align); - if (!mem_section) - panic("%s: Failed to allocate %lu bytes align=0x%lx\n", - __func__, size, align); - } -#endif - start &= PAGE_SECTION_MASK; mminit_validate_memmodel_limits(&start, &end); for (pfn = start; pfn < end; pfn += PAGES_PER_SECTION) { - unsigned long section = pfn_to_section_nr(pfn); + unsigned long section_nr = pfn_to_section_nr(pfn); struct mem_section *ms; - sparse_index_init(section, nid); - set_section_nid(section, nid); + sparse_index_init(section_nr, nid); + set_section_nid(section_nr, nid); - ms = __nr_to_section(section); + ms = __nr_to_section(section_nr); if (!ms->section_mem_map) { ms->section_mem_map = sparse_encode_early_nid(nid) | SECTION_IS_ONLINE; - __section_mark_present(ms, section); + __section_mark_present(ms, section_nr); } } } @@ -267,6 +251,19 @@ static void __init memblocks_present(void) unsigned long start, end; int i, nid; +#ifdef CONFIG_SPARSEMEM_EXTREME + if (unlikely(!mem_section)) { + unsigned long size, align; + + size = sizeof(struct mem_section *) * NR_SECTION_ROOTS; + align = 1 << (INTERNODE_CACHE_SHIFT); + mem_section = memblock_alloc(size, align); + if (!mem_section) + panic("%s: Failed to allocate %lu bytes align=0x%lx\n", + __func__, size, align); + } +#endif + for_each_mem_pfn_range(i, MAX_NUMNODES, &start, &end, &nid) memory_present(nid, start, end); } @@ -351,7 +348,7 @@ sparse_early_usemaps_alloc_pgdat_section(struct pglist_data *pgdat, again: usage = memblock_alloc_try_nid(size, SMP_CACHE_BYTES, goal, limit, nid); if (!usage && limit) { - limit = 0; + limit = MEMBLOCK_ALLOC_ACCESSIBLE; goto again; } return usage; @@ -465,6 +462,9 @@ static void __init sparse_buffer_init(unsigned long size, int nid) */ sparsemap_buf = memmap_alloc(size, section_map_size(), addr, nid, true); sparsemap_buf_end = sparsemap_buf + size; +#ifndef CONFIG_SPARSEMEM_VMEMMAP + memmap_boot_pages_add(DIV_ROUND_UP(size, PAGE_SIZE)); +#endif } static void __init sparse_buffer_fini(void) @@ -560,6 +560,8 @@ void __init sparse_init(void) unsigned long pnum_end, pnum_begin, map_count = 1; int nid_begin; + /* see include/linux/mmzone.h 'struct mem_section' definition */ + BUILD_BUG_ON(!is_power_of_2(sizeof(struct mem_section))); memblocks_present(); pnum_begin = first_present_section_nr(); @@ -641,6 +643,7 @@ static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages, unsigned long start = (unsigned long) pfn_to_page(pfn); unsigned long end = start + nr_pages * sizeof(struct page); + memmap_pages_add(-1L * (DIV_ROUND_UP(end - start, PAGE_SIZE))); vmemmap_free(start, end, altmap); } static void free_map_bootmem(struct page *memmap) |