diff options
Diffstat (limited to 'mm/page_alloc.c')
| -rw-r--r-- | mm/page_alloc.c | 78 |
1 files changed, 75 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 12a81870815f..7af45b2e8870 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -235,6 +235,64 @@ EXPORT_SYMBOL(nr_online_nodes); int page_group_by_mobility_disabled __read_mostly; +#ifdef CONFIG_DEFERRED_STRUCT_PAGE_INIT +static inline void reset_deferred_meminit(pg_data_t *pgdat) +{ + pgdat->first_deferred_pfn = ULONG_MAX; +} + +/* Returns true if the struct page for the pfn is uninitialised */ +static inline bool __defermem_init early_page_uninitialised(unsigned long pfn) +{ + int nid = early_pfn_to_nid(pfn); + + if (pfn >= NODE_DATA(nid)->first_deferred_pfn) + return true; + + return false; +} + +/* + * Returns false when the remaining initialisation should be deferred until + * later in the boot cycle when it can be parallelised. + */ +static inline bool update_defer_init(pg_data_t *pgdat, + unsigned long pfn, unsigned long zone_end, + unsigned long *nr_initialised) +{ + /* Always populate low zones for address-contrained allocations */ + if (zone_end < pgdat_end_pfn(pgdat)) + return true; + + /* Initialise at least 2G of the highest zone */ + (*nr_initialised)++; + if (*nr_initialised > (2UL << (30 - PAGE_SHIFT)) && + (pfn & (PAGES_PER_SECTION - 1)) == 0) { + pgdat->first_deferred_pfn = pfn; + return false; + } + + return true; +} +#else +static inline void reset_deferred_meminit(pg_data_t *pgdat) +{ +} + +static inline bool early_page_uninitialised(unsigned long pfn) +{ + return false; +} + +static inline bool update_defer_init(pg_data_t *pgdat, + unsigned long pfn, unsigned long zone_end, + unsigned long *nr_initialised) +{ + return true; +} +#endif + + void set_pageblock_migratetype(struct page *page, int migratetype) { if (unlikely(page_group_by_mobility_disabled && @@ -878,8 +936,8 @@ static void __free_pages_ok(struct page *page, unsigned int order) local_irq_restore(flags); } -void __init __free_pages_bootmem(struct page *page, unsigned long pfn, - unsigned int order) +static void __defer_init __free_pages_boot_core(struct page *page, + unsigned long pfn, unsigned int order) { unsigned int nr_pages = 1 << order; struct page *p = page; @@ -951,6 +1009,14 @@ static inline bool __meminit meminit_pfn_in_nid(unsigned long pfn, int node, #endif +void __defer_init __free_pages_bootmem(struct page *page, unsigned long pfn, + unsigned int order) +{ + if (early_page_uninitialised(pfn)) + return; + return __free_pages_boot_core(page, pfn, order); +} + #ifdef CONFIG_CMA /* Free whole pageblock and set its migration type to MIGRATE_CMA. */ void __init init_cma_reserved_pageblock(struct page *page) @@ -4325,14 +4391,16 @@ static void setup_zone_migrate_reserve(struct zone *zone) void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, unsigned long start_pfn, enum memmap_context context) { + pg_data_t *pgdat = NODE_DATA(nid); unsigned long end_pfn = start_pfn + size; unsigned long pfn; struct zone *z; + unsigned long nr_initialised = 0; if (highest_memmap_pfn < end_pfn - 1) highest_memmap_pfn = end_pfn - 1; - z = &NODE_DATA(nid)->node_zones[zone]; + z = &pgdat->node_zones[zone]; for (pfn = start_pfn; pfn < end_pfn; pfn++) { /* * There can be holes in boot-time mem_map[]s @@ -4344,6 +4412,9 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone, continue; if (!early_pfn_in_nid(pfn, nid)) continue; + if (!update_defer_init(pgdat, pfn, end_pfn, + &nr_initialised)) + break; } __init_single_pfn(pfn, zone, nid); } @@ -5144,6 +5215,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size, /* pg_data_t should be reset to zero when it's allocated */ WARN_ON(pgdat->nr_zones || pgdat->classzone_idx); + reset_deferred_meminit(pgdat); pgdat->node_id = nid; pgdat->node_start_pfn = node_start_pfn; #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP |