diff options
Diffstat (limited to 'include/linux/mmzone.h')
| -rw-r--r-- | include/linux/mmzone.h | 105 |
1 files changed, 97 insertions, 8 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h index 428328a05fa..35a7b5e1946 100644 --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -81,21 +81,31 @@ struct zone_padding { enum zone_stat_item { /* First 128 byte cacheline (assuming 64 bit words) */ NR_FREE_PAGES, - NR_INACTIVE, - NR_ACTIVE, + NR_LRU_BASE, + NR_INACTIVE_ANON = NR_LRU_BASE, /* must match order of LRU_[IN]ACTIVE */ + NR_ACTIVE_ANON, /* " " " " " */ + NR_INACTIVE_FILE, /* " " " " " */ + NR_ACTIVE_FILE, /* " " " " " */ +#ifdef CONFIG_UNEVICTABLE_LRU + NR_UNEVICTABLE, /* " " " " " */ + NR_MLOCK, /* mlock()ed pages found and moved off LRU */ +#else + NR_UNEVICTABLE = NR_ACTIVE_FILE, /* avoid compiler errors in dead code */ + NR_MLOCK = NR_ACTIVE_FILE, +#endif NR_ANON_PAGES, /* Mapped anonymous pages */ NR_FILE_MAPPED, /* pagecache pages mapped into pagetables. only modified from process context */ NR_FILE_PAGES, NR_FILE_DIRTY, NR_WRITEBACK, - /* Second 128 byte cacheline */ NR_SLAB_RECLAIMABLE, NR_SLAB_UNRECLAIMABLE, NR_PAGETABLE, /* used for pagetables */ NR_UNSTABLE_NFS, /* NFS unstable pages */ NR_BOUNCE, NR_VMSCAN_WRITE, + /* Second 128 byte cacheline */ NR_WRITEBACK_TEMP, /* Writeback using temporary buffers */ #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ @@ -107,6 +117,55 @@ enum zone_stat_item { #endif NR_VM_ZONE_STAT_ITEMS }; +/* + * We do arithmetic on the LRU lists in various places in the code, + * so it is important to keep the active lists LRU_ACTIVE higher in + * the array than the corresponding inactive lists, and to keep + * the *_FILE lists LRU_FILE higher than the corresponding _ANON lists. + * + * This has to be kept in sync with the statistics in zone_stat_item + * above and the descriptions in vmstat_text in mm/vmstat.c + */ +#define LRU_BASE 0 +#define LRU_ACTIVE 1 +#define LRU_FILE 2 + +enum lru_list { + LRU_INACTIVE_ANON = LRU_BASE, + LRU_ACTIVE_ANON = LRU_BASE + LRU_ACTIVE, + LRU_INACTIVE_FILE = LRU_BASE + LRU_FILE, + LRU_ACTIVE_FILE = LRU_BASE + LRU_FILE + LRU_ACTIVE, +#ifdef CONFIG_UNEVICTABLE_LRU + LRU_UNEVICTABLE, +#else + LRU_UNEVICTABLE = LRU_ACTIVE_FILE, /* avoid compiler errors in dead code */ +#endif + NR_LRU_LISTS +}; + +#define for_each_lru(l) for (l = 0; l < NR_LRU_LISTS; l++) + +#define for_each_evictable_lru(l) for (l = 0; l <= LRU_ACTIVE_FILE; l++) + +static inline int is_file_lru(enum lru_list l) +{ + return (l == LRU_INACTIVE_FILE || l == LRU_ACTIVE_FILE); +} + +static inline int is_active_lru(enum lru_list l) +{ + return (l == LRU_ACTIVE_ANON || l == LRU_ACTIVE_FILE); +} + +static inline int is_unevictable_lru(enum lru_list l) +{ +#ifdef CONFIG_UNEVICTABLE_LRU + return (l == LRU_UNEVICTABLE); +#else + return 0; +#endif +} + struct per_cpu_pages { int count; /* number of pages in the list */ int high; /* high watermark, emptying needed */ @@ -251,10 +310,22 @@ struct zone { /* Fields commonly accessed by the page reclaim scanner */ spinlock_t lru_lock; - struct list_head active_list; - struct list_head inactive_list; - unsigned long nr_scan_active; - unsigned long nr_scan_inactive; + struct { + struct list_head list; + unsigned long nr_scan; + } lru[NR_LRU_LISTS]; + + /* + * The pageout code in vmscan.c keeps track of how many of the + * mem/swap backed and file backed pages are refeferenced. + * The higher the rotated/scanned ratio, the more valuable + * that cache is. + * + * The anon LRU stats live in [0], file LRU stats in [1] + */ + unsigned long recent_rotated[2]; + unsigned long recent_scanned[2]; + unsigned long pages_scanned; /* since last reclaim */ unsigned long flags; /* zone flags, see below */ @@ -276,6 +347,12 @@ struct zone { */ int prev_priority; + /* + * The target ratio of ACTIVE_ANON to INACTIVE_ANON pages on + * this zone's LRU. Maintained by the pageout code. + */ + unsigned int inactive_ratio; + ZONE_PADDING(_pad2_) /* Rarely used or read-mostly fields */ @@ -524,8 +601,11 @@ typedef struct pglist_data { struct zone node_zones[MAX_NR_ZONES]; struct zonelist node_zonelists[MAX_ZONELISTS]; int nr_zones; -#ifdef CONFIG_FLAT_NODE_MEM_MAP +#ifdef CONFIG_FLAT_NODE_MEM_MAP /* means !SPARSEMEM */ struct page *node_mem_map; +#ifdef CONFIG_CGROUP_MEM_RES_CTLR + struct page_cgroup *node_page_cgroup; +#endif #endif struct bootmem_data *bdata; #ifdef CONFIG_MEMORY_HOTPLUG @@ -854,6 +934,7 @@ static inline unsigned long early_pfn_to_nid(unsigned long pfn) #endif struct page; +struct page_cgroup; struct mem_section { /* * This is, logically, a pointer to an array of struct @@ -871,6 +952,14 @@ struct mem_section { /* See declaration of similar field in struct zone */ unsigned long *pageblock_flags; +#ifdef CONFIG_CGROUP_MEM_RES_CTLR + /* + * If !SPARSEMEM, pgdat doesn't have page_cgroup pointer. We use + * section. (see memcontrol.h/page_cgroup.h about this.) + */ + struct page_cgroup *page_cgroup; + unsigned long pad; +#endif }; #ifdef CONFIG_SPARSEMEM_EXTREME |