diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memory_hotplug.c | 48 | ||||
| -rw-r--r-- | mm/sparse.c | 74 |
2 files changed, 72 insertions, 50 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 855e0fc928b..2e916c308ae 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -24,28 +24,6 @@ #include <asm/tlbflush.h> -static struct page *__kmalloc_section_memmap(unsigned long nr_pages) -{ - struct page *page, *ret; - unsigned long memmap_size = sizeof(struct page) * nr_pages; - - page = alloc_pages(GFP_KERNEL, get_order(memmap_size)); - if (page) - goto got_map_page; - - ret = vmalloc(memmap_size); - if (ret) - goto got_map_ptr; - - return NULL; -got_map_page: - ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); -got_map_ptr: - memset(ret, 0, memmap_size); - - return ret; -} - extern void zonetable_add(struct zone *zone, int nid, int zid, unsigned long pfn, unsigned long size); static void __add_zone(struct zone *zone, unsigned long phys_start_pfn) @@ -60,35 +38,15 @@ static void __add_zone(struct zone *zone, unsigned long phys_start_pfn) zonetable_add(zone, nid, zone_type, phys_start_pfn, nr_pages); } -extern int sparse_add_one_section(struct zone *, unsigned long, - struct page *mem_map); +extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn, + int nr_pages); static int __add_section(struct zone *zone, unsigned long phys_start_pfn) { struct pglist_data *pgdat = zone->zone_pgdat; int nr_pages = PAGES_PER_SECTION; - struct page *memmap; int ret; - /* - * This can potentially allocate memory, and does its own - * internal locking. - */ - sparse_index_init(pfn_to_section_nr(phys_start_pfn), pgdat->node_id); - - pgdat_resize_lock(pgdat, &flags); - memmap = __kmalloc_section_memmap(nr_pages); - ret = sparse_add_one_section(zone, phys_start_pfn, memmap); - pgdat_resize_unlock(pgdat, &flags); - - if (ret <= 0) { - /* the mem_map didn't get used */ - if (memmap >= (struct page *)VMALLOC_START && - memmap < (struct page *)VMALLOC_END) - vfree(memmap); - else - free_pages((unsigned long)memmap, - get_order(sizeof(struct page) * nr_pages)); - } + ret = sparse_add_one_section(zone, phys_start_pfn, nr_pages); if (ret < 0) return ret; diff --git a/mm/sparse.c b/mm/sparse.c index 0d3bd4bf3aa..72079b538e2 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -5,8 +5,10 @@ #include <linux/mm.h> #include <linux/mmzone.h> #include <linux/bootmem.h> +#include <linux/highmem.h> #include <linux/module.h> #include <linux/spinlock.h> +#include <linux/vmalloc.h> #include <asm/dma.h> /* @@ -187,6 +189,45 @@ static struct page *sparse_early_mem_map_alloc(unsigned long pnum) return NULL; } +static struct page *__kmalloc_section_memmap(unsigned long nr_pages) +{ + struct page *page, *ret; + unsigned long memmap_size = sizeof(struct page) * nr_pages; + + page = alloc_pages(GFP_KERNEL, get_order(memmap_size)); + if (page) + goto got_map_page; + + ret = vmalloc(memmap_size); + if (ret) + goto got_map_ptr; + + return NULL; +got_map_page: + ret = (struct page *)pfn_to_kaddr(page_to_pfn(page)); +got_map_ptr: + memset(ret, 0, memmap_size); + + return ret; +} + +static int vaddr_in_vmalloc_area(void *addr) +{ + if (addr >= (void *)VMALLOC_START && + addr < (void *)VMALLOC_END) + return 1; + return 0; +} + +static void __kfree_section_memmap(struct page *memmap, unsigned long nr_pages) +{ + if (vaddr_in_vmalloc_area(memmap)) + vfree(memmap); + else + free_pages((unsigned long)memmap, + get_order(sizeof(struct page) * nr_pages)); +} + /* * Allocate the accumulated non-linear sections, allocate a mem_map * for each and record the physical to section mapping. @@ -212,14 +253,37 @@ void sparse_init(void) * set. If this is <=0, then that means that the passed-in * map was not consumed and must be freed. */ -int sparse_add_one_section(unsigned long start_pfn, int nr_pages, struct page *map) +int sparse_add_one_section(struct zone *zone, unsigned long start_pfn, + int nr_pages) { - struct mem_section *ms = __pfn_to_section(start_pfn); + unsigned long section_nr = pfn_to_section_nr(start_pfn); + struct pglist_data *pgdat = zone->zone_pgdat; + struct mem_section *ms; + struct page *memmap; + unsigned long flags; + int ret; - if (ms->section_mem_map & SECTION_MARKED_PRESENT) - return -EEXIST; + /* + * no locking for this, because it does its own + * plus, it does a kmalloc + */ + sparse_index_init(section_nr, pgdat->node_id); + memmap = __kmalloc_section_memmap(nr_pages); + + pgdat_resize_lock(pgdat, &flags); + ms = __pfn_to_section(start_pfn); + if (ms->section_mem_map & SECTION_MARKED_PRESENT) { + ret = -EEXIST; + goto out; + } ms->section_mem_map |= SECTION_MARKED_PRESENT; - return sparse_init_one_section(ms, pfn_to_section_nr(start_pfn), map); + ret = sparse_init_one_section(ms, section_nr, memmap); + + if (ret <= 0) + __kfree_section_memmap(memmap, nr_pages); +out: + pgdat_resize_unlock(pgdat, &flags); + return ret; } |