diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 75 |
1 files changed, 57 insertions, 18 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 2daa54f55db7..4bec5be82cab 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -63,10 +63,8 @@ enum { #ifdef CONFIG_CMA # define is_migrate_cma(migratetype) unlikely((migratetype) == MIGRATE_CMA) -# define cma_wmark_pages(zone) zone->min_cma_pages #else # define is_migrate_cma(migratetype) false -# define cma_wmark_pages(zone) 0 #endif #define for_each_migratetype_order(order, type) \ @@ -142,6 +140,7 @@ enum zone_stat_item { NUMA_OTHER, /* allocation from other node */ #endif NR_ANON_TRANSPARENT_HUGEPAGES, + NR_FREE_CMA_PAGES, NR_VM_ZONE_STAT_ITEMS }; /* @@ -217,6 +216,8 @@ struct lruvec { #define ISOLATE_UNMAPPED ((__force isolate_mode_t)0x2) /* Isolate for asynchronous migration */ #define ISOLATE_ASYNC_MIGRATE ((__force isolate_mode_t)0x4) +/* Isolate unevictable pages */ +#define ISOLATE_UNEVICTABLE ((__force isolate_mode_t)0x8) /* LRU Isolation modes. */ typedef unsigned __bitwise__ isolate_mode_t; @@ -369,20 +370,17 @@ struct zone { spinlock_t lock; int all_unreclaimable; /* All pages pinned */ #if defined CONFIG_COMPACTION || defined CONFIG_CMA - /* pfn where the last incremental compaction isolated free pages */ + /* Set to true when the PG_migrate_skip bits should be cleared */ + bool compact_blockskip_flush; + + /* pfns where compaction scanners should start */ unsigned long compact_cached_free_pfn; + unsigned long compact_cached_migrate_pfn; #endif #ifdef CONFIG_MEMORY_HOTPLUG /* see spanned/present_pages for more description */ seqlock_t span_seqlock; #endif -#ifdef CONFIG_CMA - /* - * CMA needs to increase watermark levels during the allocation - * process to make sure that the system is not starved. - */ - unsigned long min_cma_pages; -#endif struct free_area free_area[MAX_ORDER]; #ifndef CONFIG_SPARSEMEM @@ -462,17 +460,44 @@ struct zone { unsigned long zone_start_pfn; /* - * zone_start_pfn, spanned_pages and present_pages are all - * protected by span_seqlock. It is a seqlock because it has - * to be read outside of zone->lock, and it is done in the main - * allocator path. But, it is written quite infrequently. + * spanned_pages is the total pages spanned by the zone, including + * holes, which is calculated as: + * spanned_pages = zone_end_pfn - zone_start_pfn; + * + * present_pages is physical pages existing within the zone, which + * is calculated as: + * present_pages = spanned_pages - absent_pages(pags in holes); + * + * managed_pages is present pages managed by the buddy system, which + * is calculated as (reserved_pages includes pages allocated by the + * bootmem allocator): + * managed_pages = present_pages - reserved_pages; + * + * So present_pages may be used by memory hotplug or memory power + * management logic to figure out unmanaged pages by checking + * (present_pages - managed_pages). And managed_pages should be used + * by page allocator and vm scanner to calculate all kinds of watermarks + * and thresholds. * - * The lock is declared along with zone->lock because it is + * Locking rules: + * + * zone_start_pfn and spanned_pages are protected by span_seqlock. + * It is a seqlock because it has to be read outside of zone->lock, + * and it is done in the main allocator path. But, it is written + * quite infrequently. + * + * The span_seq lock is declared along with zone->lock because it is * frequently read in proximity to zone->lock. It's good to * give them a chance of being in the same cacheline. + * + * Write access to present_pages and managed_pages at runtime should + * be protected by lock_memory_hotplug()/unlock_memory_hotplug(). + * Any reader who can't tolerant drift of present_pages and + * managed_pages should hold memory hotplug lock to get a stable value. */ - unsigned long spanned_pages; /* total size, including holes */ - unsigned long present_pages; /* amount of memory (excluding holes) */ + unsigned long spanned_pages; + unsigned long present_pages; + unsigned long managed_pages; /* * rarely used fields: @@ -704,11 +729,25 @@ typedef struct pglist_data { unsigned long node_spanned_pages; /* total size of physical page range, including holes */ int node_id; + nodemask_t reclaim_nodes; /* Nodes allowed to reclaim from */ wait_queue_head_t kswapd_wait; wait_queue_head_t pfmemalloc_wait; struct task_struct *kswapd; /* Protected by lock_memory_hotplug() */ int kswapd_max_order; enum zone_type classzone_idx; +#ifdef CONFIG_NUMA_BALANCING + /* + * Lock serializing the per destination node AutoNUMA memory + * migration rate limiting data. + */ + spinlock_t numabalancing_migrate_lock; + + /* Rate limiting time interval */ + unsigned long numabalancing_migrate_next_window; + + /* Number of pages migrated during the rate limiting time interval */ + unsigned long numabalancing_migrate_nr_pages; +#endif } pg_data_t; #define node_present_pages(nid) (NODE_DATA(nid)->node_present_pages) @@ -744,7 +783,7 @@ extern int init_currently_empty_zone(struct zone *zone, unsigned long start_pfn, unsigned long size, enum memmap_context context); -extern void lruvec_init(struct lruvec *lruvec, struct zone *zone); +extern void lruvec_init(struct lruvec *lruvec); static inline struct zone *lruvec_zone(struct lruvec *lruvec) { |