diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 105 |
1 files changed, 68 insertions, 37 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index d77d717c620c..462f6873905a 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -234,6 +234,8 @@ enum node_stat_item { NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */ NR_SHMEM_THPS, NR_SHMEM_PMDMAPPED, + NR_FILE_THPS, + NR_FILE_PMDMAPPED, NR_ANON_THPS, NR_UNSTABLE_NFS, /* NFS unstable pages */ NR_VMSCAN_WRITE, @@ -270,12 +272,12 @@ enum lru_list { #define for_each_evictable_lru(lru) for (lru = 0; lru <= LRU_ACTIVE_FILE; lru++) -static inline int is_file_lru(enum lru_list lru) +static inline bool is_file_lru(enum lru_list lru) { return (lru == LRU_INACTIVE_FILE || lru == LRU_ACTIVE_FILE); } -static inline int is_active_lru(enum lru_list lru) +static inline bool is_active_lru(enum lru_list lru) { return (lru == LRU_ACTIVE_ANON || lru == LRU_ACTIVE_FILE); } @@ -293,6 +295,12 @@ struct zone_reclaim_stat { unsigned long recent_scanned[2]; }; +enum lruvec_flags { + LRUVEC_CONGESTED, /* lruvec has many dirty pages + * backed by a congested BDI + */ +}; + struct lruvec { struct list_head lists[NR_LRU_LISTS]; struct zone_reclaim_stat reclaim_stat; @@ -300,12 +308,14 @@ struct lruvec { atomic_long_t inactive_age; /* Refaults at the time of last reclaim cycle */ unsigned long refaults; + /* Various lruvec state flags (enum lruvec_flags) */ + unsigned long flags; #ifdef CONFIG_MEMCG struct pglist_data *pgdat; #endif }; -/* Isolate unmapped file */ +/* Isolate unmapped pages */ #define ISOLATE_UNMAPPED ((__force isolate_mode_t)0x2) /* Isolate for asynchronous migration */ #define ISOLATE_ASYNC_MIGRATE ((__force isolate_mode_t)0x4) @@ -356,33 +366,40 @@ struct per_cpu_nodestat { #endif /* !__GENERATING_BOUNDS.H */ enum zone_type { -#ifdef CONFIG_ZONE_DMA /* - * ZONE_DMA is used when there are devices that are not able - * to do DMA to all of addressable memory (ZONE_NORMAL). Then we - * carve out the portion of memory that is needed for these devices. - * The range is arch specific. + * ZONE_DMA and ZONE_DMA32 are used when there are peripherals not able + * to DMA to all of the addressable memory (ZONE_NORMAL). + * On architectures where this area covers the whole 32 bit address + * space ZONE_DMA32 is used. ZONE_DMA is left for the ones with smaller + * DMA addressing constraints. This distinction is important as a 32bit + * DMA mask is assumed when ZONE_DMA32 is defined. Some 64-bit + * platforms may need both zones as they support peripherals with + * different DMA addressing limitations. + * + * Some examples: + * + * - i386 and x86_64 have a fixed 16M ZONE_DMA and ZONE_DMA32 for the + * rest of the lower 4G. + * + * - arm only uses ZONE_DMA, the size, up to 4G, may vary depending on + * the specific device. + * + * - arm64 has a fixed 1G ZONE_DMA and ZONE_DMA32 for the rest of the + * lower 4G. + * + * - powerpc only uses ZONE_DMA, the size, up to 2G, may vary + * depending on the specific device. * - * Some examples + * - s390 uses ZONE_DMA fixed to the lower 2G. * - * Architecture Limit - * --------------------------- - * parisc, ia64, sparc <4G - * s390, powerpc <2G - * arm Various - * alpha Unlimited or 0-16MB. + * - ia64 and riscv only use ZONE_DMA32. * - * i386, x86_64 and multiple other arches - * <16M. + * - parisc uses neither. */ +#ifdef CONFIG_ZONE_DMA ZONE_DMA, #endif #ifdef CONFIG_ZONE_DMA32 - /* - * x86_64 needs two ZONE_DMAs because it supports devices that are - * only able to do DMA to the lower 16M but also 32 bit devices that - * can only do DMA areas below 4G. - */ ZONE_DMA32, #endif /* @@ -562,9 +579,6 @@ struct zone { } ____cacheline_internodealigned_in_smp; enum pgdat_flags { - PGDAT_CONGESTED, /* pgdat has many dirty pages backed by - * a congested BDI - */ PGDAT_DIRTY, /* reclaim scanning has recently found * many dirty file pages at the tail * of the LRU. @@ -676,6 +690,14 @@ struct zonelist { extern struct page *mem_map; #endif +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +struct deferred_split { + spinlock_t split_queue_lock; + struct list_head split_queue; + unsigned long split_queue_len; +}; +#endif + /* * On NUMA machines, each NUMA node would have a pg_data_t to describe * it's memory layout. On UMA machines there is a single pglist_data which @@ -736,7 +758,7 @@ typedef struct pglist_data { #ifdef CONFIG_NUMA /* - * zone reclaim becomes active if more unmapped pages exist. + * node reclaim becomes active if more unmapped pages exist. */ unsigned long min_unmapped_pages; unsigned long min_slab_pages; @@ -755,13 +777,17 @@ typedef struct pglist_data { #endif /* CONFIG_DEFERRED_STRUCT_PAGE_INIT */ #ifdef CONFIG_TRANSPARENT_HUGEPAGE - spinlock_t split_queue_lock; - struct list_head split_queue; - unsigned long split_queue_len; + struct deferred_split deferred_split_queue; #endif /* Fields commonly accessed by the page reclaim scanner */ - struct lruvec lruvec; + + /* + * NOTE: THIS IS UNUSED IF MEMCG IS ENABLED. + * + * Use mem_cgroup_lruvec() to look up lruvecs. + */ + struct lruvec __lruvec; unsigned long flags; @@ -784,11 +810,6 @@ typedef struct pglist_data { #define node_start_pfn(nid) (NODE_DATA(nid)->node_start_pfn) #define node_end_pfn(nid) pgdat_end_pfn(NODE_DATA(nid)) -static inline struct lruvec *node_lruvec(struct pglist_data *pgdat) -{ - return &pgdat->lruvec; -} - static inline unsigned long pgdat_end_pfn(pg_data_t *pgdat) { return pgdat->node_start_pfn + pgdat->node_spanned_pages; @@ -826,7 +847,7 @@ static inline struct pglist_data *lruvec_pgdat(struct lruvec *lruvec) #ifdef CONFIG_MEMCG return lruvec->pgdat; #else - return container_of(lruvec, struct pglist_data, lruvec); + return container_of(lruvec, struct pglist_data, __lruvec); #endif } @@ -1063,7 +1084,7 @@ static inline struct zoneref *first_zones_zonelist(struct zonelist *zonelist, /** * for_each_zone_zonelist_nodemask - helper macro to iterate over valid zones in a zonelist at or below a given zone index and within a nodemask * @zone - The current zone in the iterator - * @z - The current pointer within zonelist->zones being iterated + * @z - The current pointer within zonelist->_zonerefs being iterated * @zlist - The zonelist being iterated * @highidx - The zone index of the highest zone to return * @nodemask - Nodemask allowed by the allocator @@ -1358,6 +1379,16 @@ static inline int pfn_present(unsigned long pfn) return present_section(__nr_to_section(pfn_to_section_nr(pfn))); } +static inline unsigned long next_present_section_nr(unsigned long section_nr) +{ + while (++section_nr <= __highest_present_section_nr) { + if (present_section_nr(section_nr)) + return section_nr; + } + + return -1; +} + /* * These are _only_ used during initialisation, therefore they * can use __initdata ... They could have names to indicate |
