diff options
Diffstat (limited to 'mm/sparse-vmemmap.c')
| -rw-r--r-- | mm/sparse-vmemmap.c | 98 |
1 files changed, 84 insertions, 14 deletions
diff --git a/mm/sparse-vmemmap.c b/mm/sparse-vmemmap.c index d9714bdcb4a..4cba9c2783a 100644 --- a/mm/sparse-vmemmap.c +++ b/mm/sparse-vmemmap.c @@ -9,7 +9,7 @@ * * However, virtual mappings need a page table and TLBs. Many Linux * architectures already map their physical space using 1-1 mappings - * via TLBs. For those arches the virtual memmory map is essentially + * via TLBs. For those arches the virtual memory map is essentially * for free if we use the same page size as the 1-1 mappings. In that * case the overhead consists of a few additional pages that are * allocated to create a view of memory for vmemmap. @@ -21,7 +21,7 @@ #include <linux/mmzone.h> #include <linux/bootmem.h> #include <linux/highmem.h> -#include <linux/module.h> +#include <linux/slab.h> #include <linux/spinlock.h> #include <linux/vmalloc.h> #include <linux/sched.h> @@ -40,9 +40,12 @@ static void * __init_refok __earlyonly_bootmem_alloc(int node, unsigned long align, unsigned long goal) { - return __alloc_bootmem_node(NODE_DATA(node), size, align, goal); + return memblock_virt_alloc_try_nid(size, align, goal, + BOOTMEM_ALLOC_ACCESSIBLE, node); } +static void *vmemmap_buf; +static void *vmemmap_buf_end; void * __meminit vmemmap_alloc_block(unsigned long size, int node) { @@ -51,10 +54,12 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node) struct page *page; if (node_state(node, N_HIGH_MEMORY)) - page = alloc_pages_node(node, - GFP_KERNEL | __GFP_ZERO, get_order(size)); + page = alloc_pages_node( + node, GFP_KERNEL | __GFP_ZERO | __GFP_REPEAT, + get_order(size)); else - page = alloc_pages(GFP_KERNEL | __GFP_ZERO, + page = alloc_pages( + GFP_KERNEL | __GFP_ZERO | __GFP_REPEAT, get_order(size)); if (page) return page_address(page); @@ -64,6 +69,24 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node) __pa(MAX_DMA_ADDRESS)); } +/* need to make sure size is all the same during early stage */ +void * __meminit vmemmap_alloc_block_buf(unsigned long size, int node) +{ + void *ptr; + + if (!vmemmap_buf) + return vmemmap_alloc_block(size, node); + + /* take the from buf */ + ptr = (void *)ALIGN((unsigned long)vmemmap_buf, size); + if (ptr + size > vmemmap_buf_end) + return vmemmap_alloc_block(size, node); + + vmemmap_buf = ptr + size; + + return ptr; +} + void __meminit vmemmap_verify(pte_t *pte, int node, unsigned long start, unsigned long end) { @@ -80,7 +103,7 @@ pte_t * __meminit vmemmap_pte_populate(pmd_t *pmd, unsigned long addr, int node) pte_t *pte = pte_offset_kernel(pmd, addr); if (pte_none(*pte)) { pte_t entry; - void *p = vmemmap_alloc_block(PAGE_SIZE, node); + void *p = vmemmap_alloc_block_buf(PAGE_SIZE, node); if (!p) return NULL; entry = pfn_pte(__pa(p) >> PAGE_SHIFT, PAGE_KERNEL); @@ -125,11 +148,10 @@ pgd_t * __meminit vmemmap_pgd_populate(unsigned long addr, int node) return pgd; } -int __meminit vmemmap_populate_basepages(struct page *start_page, - unsigned long size, int node) +int __meminit vmemmap_populate_basepages(unsigned long start, + unsigned long end, int node) { - unsigned long addr = (unsigned long)start_page; - unsigned long end = (unsigned long)(start_page + size); + unsigned long addr = start; pgd_t *pgd; pud_t *pud; pmd_t *pmd; @@ -156,10 +178,58 @@ int __meminit vmemmap_populate_basepages(struct page *start_page, struct page * __meminit sparse_mem_map_populate(unsigned long pnum, int nid) { - struct page *map = pfn_to_page(pnum * PAGES_PER_SECTION); - int error = vmemmap_populate(map, PAGES_PER_SECTION, nid); - if (error) + unsigned long start; + unsigned long end; + struct page *map; + + map = pfn_to_page(pnum * PAGES_PER_SECTION); + start = (unsigned long)map; + end = (unsigned long)(map + PAGES_PER_SECTION); + + if (vmemmap_populate(start, end, nid)) return NULL; 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; + unsigned long size = sizeof(struct page) * PAGES_PER_SECTION; + void *vmemmap_buf_start; + + size = ALIGN(size, PMD_SIZE); + vmemmap_buf_start = __earlyonly_bootmem_alloc(nodeid, size * map_count, + PMD_SIZE, __pa(MAX_DMA_ADDRESS)); + + if (vmemmap_buf_start) { + vmemmap_buf = vmemmap_buf_start; + vmemmap_buf_end = vmemmap_buf_start + size * map_count; + } + + for (pnum = pnum_begin; pnum < pnum_end; pnum++) { + struct mem_section *ms; + + if (!present_section_nr(pnum)) + continue; + + map_map[pnum] = sparse_mem_map_populate(pnum, nodeid); + if (map_map[pnum]) + continue; + ms = __nr_to_section(pnum); + printk(KERN_ERR "%s: sparsemem memory map backing failed " + "some memory will not be available.\n", __func__); + ms->section_mem_map = 0; + } + + if (vmemmap_buf_start) { + /* need to free left buf */ + memblock_free_early(__pa(vmemmap_buf), + vmemmap_buf_end - vmemmap_buf); + vmemmap_buf = NULL; + vmemmap_buf_end = NULL; + } +} |