diff options
Diffstat (limited to 'include/linux/memory-tiers.h')
| -rw-r--r-- | include/linux/memory-tiers.h | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/include/linux/memory-tiers.h b/include/linux/memory-tiers.h index 7ae6308b2191..49d281866dca 100644 --- a/include/linux/memory-tiers.h +++ b/include/linux/memory-tiers.h @@ -2,6 +2,9 @@ #ifndef _LINUX_MEMORY_TIERS_H #define _LINUX_MEMORY_TIERS_H +#include <linux/types.h> +#include <linux/nodemask.h> +#include <linux/kref.h> /* * Each tier cover a abstrace distance chunk size of 128 */ @@ -16,12 +19,49 @@ #define MEMTIER_ADISTANCE_DRAM ((4 * MEMTIER_CHUNK_SIZE) + (MEMTIER_CHUNK_SIZE >> 1)) #define MEMTIER_HOTPLUG_PRIO 100 +struct memory_tier; +struct memory_dev_type { + /* list of memory types that are part of same tier as this type */ + struct list_head tier_sibiling; + /* abstract distance for this specific memory type */ + int adistance; + /* Nodes of same abstract distance */ + nodemask_t nodes; + struct kref kref; + struct memory_tier *memtier; +}; + #ifdef CONFIG_NUMA -#include <linux/types.h> extern bool numa_demotion_enabled; +struct memory_dev_type *alloc_memory_type(int adistance); +void destroy_memory_type(struct memory_dev_type *memtype); +void init_node_memory_type(int node, struct memory_dev_type *default_type); +void clear_node_memory_type(int node, struct memory_dev_type *memtype); #else #define numa_demotion_enabled false +/* + * CONFIG_NUMA implementation returns non NULL error. + */ +static inline struct memory_dev_type *alloc_memory_type(int adistance) +{ + return NULL; +} + +static inline void destroy_memory_type(struct memory_dev_type *memtype) +{ + +} + +static inline void init_node_memory_type(int node, struct memory_dev_type *default_type) +{ + +} + +static inline void clear_node_memory_type(int node, struct memory_dev_type *memtype) +{ + +} #endif /* CONFIG_NUMA */ #endif /* _LINUX_MEMORY_TIERS_H */ |