diff options
Diffstat (limited to 'freebsd/sys/vm/uma.h')
| -rw-r--r-- | freebsd/sys/vm/uma.h | 188 |
1 files changed, 120 insertions, 68 deletions
diff --git a/freebsd/sys/vm/uma.h b/freebsd/sys/vm/uma.h index dbe3c488..1ab51c89 100644 --- a/freebsd/sys/vm/uma.h +++ b/freebsd/sys/vm/uma.h @@ -33,8 +33,8 @@ * */ -#ifndef VM_UMA_H -#define VM_UMA_H +#ifndef _VM_UMA_H_ +#define _VM_UMA_H_ #include <rtems/bsd/sys/param.h> /* For NULL */ #include <sys/malloc.h> /* For M_* */ @@ -50,7 +50,7 @@ typedef struct uma_zone * uma_zone_t; void zone_drain(uma_zone_t); -/* +/* * Item constructor * * Arguments: @@ -58,7 +58,7 @@ void zone_drain(uma_zone_t); * arg The arg field passed to uma_zalloc_arg * size The size of the allocated item * flags See zalloc flags - * + * * Returns: * 0 on success * errno on failure @@ -76,7 +76,7 @@ typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags); * item A pointer to the memory which has been allocated. * size The size of the item being destructed. * arg Argument passed through uma_zfree_arg - * + * * Returns: * Nothing * @@ -87,20 +87,20 @@ typedef int (*uma_ctor)(void *mem, int size, void *arg, int flags); */ typedef void (*uma_dtor)(void *mem, int size, void *arg); -/* +/* * Item initializer * * Arguments: * item A pointer to the memory which has been allocated. * size The size of the item being initialized. * flags See zalloc flags - * + * * Returns: * 0 on success * errno on failure * * Discussion: - * The initializer is called when the memory is cached in the uma zone. + * The initializer is called when the memory is cached in the uma zone. * The initializer and the destructor should leave the object in the same * state. */ @@ -110,7 +110,7 @@ typedef int (*uma_init)(void *mem, int size, int flags); * Item discard function * * Arguments: - * item A pointer to memory which has been 'freed' but has not left the + * item A pointer to memory which has been 'freed' but has not left the * zone's cache. * size The size of the item being discarded. * @@ -124,9 +124,19 @@ typedef int (*uma_init)(void *mem, int size, int flags); typedef void (*uma_fini)(void *mem, int size); /* + * Import new memory into a cache zone. + */ +typedef int (*uma_import)(void *arg, void **store, int count, int flags); + +/* + * Free memory from a cache zone. + */ +typedef void (*uma_release)(void *arg, void **store, int count); + +/* * What's the difference between initializing and constructing? * - * The item is initialized when it is cached, and this is the state that the + * The item is initialized when it is cached, and this is the state that the * object should be in when returned to the allocator. The purpose of this is * to remove some code which would otherwise be called on each allocation by * utilizing a known, stable state. This differs from the constructor which @@ -167,7 +177,7 @@ typedef void (*uma_fini)(void *mem, int size); */ uma_zone_t uma_zcreate(const char *name, size_t size, uma_ctor ctor, uma_dtor dtor, uma_init uminit, uma_fini fini, - int align, u_int32_t flags); + int align, uint32_t flags); /* * Create a secondary uma zone @@ -211,11 +221,24 @@ uma_zone_t uma_zsecond_create(char *name, uma_ctor ctor, uma_dtor dtor, * the only supported. * * Returns: - * Error on failure, 0 on success. + * Error on failure, 0 on success. */ int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); /* + * Create cache-only zones. + * + * This allows uma's per-cpu cache facilities to handle arbitrary + * pointers. Consumers must specify the import and release functions to + * fill and destroy caches. UMA does not allocate any memory for these + * zones. The 'arg' parameter is passed to import/release and is caller + * specific. + */ +uma_zone_t uma_zcache_create(char *name, int size, uma_ctor ctor, uma_dtor dtor, + uma_init zinit, uma_fini zfini, uma_import zimport, + uma_release zrelease, void *arg, int flags); + +/* * Definitions for uma_zcreate flags * * These flags share space with UMA_ZFLAGs in uma_int.h. Be careful not to @@ -239,7 +262,7 @@ int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); * information in the vm_page. */ #define UMA_ZONE_SECONDARY 0x0200 /* Zone is a Secondary Zone */ -#define UMA_ZONE_REFCNT 0x0400 /* Allocate refcnts in slabs */ +/* 0x0400 Unused */ #define UMA_ZONE_MAXBUCKET 0x0800 /* Use largest buckets */ #define UMA_ZONE_CACHESPREAD 0x1000 /* * Spread memory start locations across @@ -252,6 +275,10 @@ int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); * Zone's pages will not be included in * mini-dumps. */ +#define UMA_ZONE_PCPU 0x8000 /* + * Allocates mp_maxid + 1 slabs sized to + * sizeof(struct pcpu). + */ /* * These flags are shared between the keg and zone. In zones wishing to add @@ -259,8 +286,8 @@ int uma_zsecond_add(uma_zone_t zone, uma_zone_t master); * physical parameters of the request and may not be provided by the consumer. */ #define UMA_ZONE_INHERIT \ - (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_HASH | \ - UMA_ZONE_REFCNT | UMA_ZONE_VTOSLAB) + (UMA_ZONE_OFFPAGE | UMA_ZONE_MALLOC | UMA_ZONE_NOFREE | \ + UMA_ZONE_HASH | UMA_ZONE_VTOSLAB | UMA_ZONE_PCPU) /* Definitions for align */ #define UMA_ALIGN_PTR (sizeof(void *) - 1) /* Alignment fit for ptr */ @@ -355,7 +382,8 @@ uma_zfree(uma_zone_t zone, void *item) * A pointer to the allocated memory or NULL on failure. */ -typedef void *(*uma_alloc)(uma_zone_t zone, int size, u_int8_t *pflag, int wait); +typedef void *(*uma_alloc)(uma_zone_t zone, vm_size_t size, uint8_t *pflag, + int wait); /* * Backend page free routines @@ -368,7 +396,7 @@ typedef void *(*uma_alloc)(uma_zone_t zone, int size, u_int8_t *pflag, int wait) * Returns: * None */ -typedef void (*uma_free)(void *item, int size, u_int8_t pflag); +typedef void (*uma_free)(void *item, vm_size_t size, uint8_t pflag); @@ -403,7 +431,7 @@ void uma_startup(void *bootmem, int boot_pages); * Discussion: * uma_startup2 is called by kmeminit() to enable us of uma for malloc. */ - + void uma_startup2(void); /* @@ -432,24 +460,29 @@ void uma_reclaim(void); void uma_set_align(int align); /* - * Switches the backing object of a zone + * Set a reserved number of items to hold for M_USE_RESERVE allocations. All + * other requests must allocate new backing pages. + */ +void uma_zone_reserve(uma_zone_t zone, int nitems); + +/* + * Reserves the maximum KVA space required by the zone and configures the zone + * to use a VM_ALLOC_NOOBJ-based backend allocator. * * Arguments: * zone The zone to update. - * obj The VM object to use for future allocations. - * size The size of the object to allocate. + * nitems The upper limit on the number of items that can be allocated. * * Returns: - * 0 if kva space can not be allocated + * 0 if KVA space can not be allocated * 1 if successful * * Discussion: - * A NULL object can be used and uma will allocate one for you. Setting - * the size will limit the amount of memory allocated to this zone. - * + * When the machine supports a direct map and the zone's items are smaller + * than a page, the zone will use the direct map instead of allocating KVA + * space. */ -struct vm_object; -int uma_zone_set_obj(uma_zone_t zone, struct vm_object *obj, int size); +int uma_zone_reserve_kva(uma_zone_t zone, int nitems); /* * Sets a high limit on the number of items allowed in a zone @@ -476,6 +509,31 @@ int uma_zone_set_max(uma_zone_t zone, int nitems); int uma_zone_get_max(uma_zone_t zone); /* + * Sets a warning to be printed when limit is reached + * + * Arguments: + * zone The zone we will warn about + * warning Warning content + * + * Returns: + * Nothing + */ +void uma_zone_set_warning(uma_zone_t zone, const char *warning); + +/* + * Sets a function to run when limit is reached + * + * Arguments: + * zone The zone to which this applies + * fx The function ro run + * + * Returns: + * Nothing + */ +typedef void (*uma_maxaction_t)(uma_zone_t, int); +void uma_zone_set_maxaction(uma_zone_t zone, uma_maxaction_t); + +/* * Obtains the approximate current number of items allocated from a zone * * Arguments: @@ -509,7 +567,7 @@ void uma_zone_set_zinit(uma_zone_t zone, uma_init zinit); void uma_zone_set_zfini(uma_zone_t zone, uma_fini zfini); /* - * Replaces the standard page_alloc or obj_alloc functions for this zone + * Replaces the standard backend allocator for this zone. * * Arguments: * zone The zone whose backend allocator is being changed. @@ -569,43 +627,34 @@ void uma_zone_set_freef(uma_zone_t zone, uma_free freef); void uma_prealloc(uma_zone_t zone, int itemcnt); /* - * Used to lookup the reference counter allocated for an item - * from a UMA_ZONE_REFCNT zone. For UMA_ZONE_REFCNT zones, - * reference counters are allocated for items and stored in - * the underlying slab header. - * - * Arguments: - * zone The UMA_ZONE_REFCNT zone to which the item belongs. - * item The address of the item for which we want a refcnt. - * - * Returns: - * A pointer to a u_int32_t reference counter. - */ -u_int32_t *uma_find_refcnt(uma_zone_t zone, void *item); - -/* * Used to determine if a fixed-size zone is exhausted. * * Arguments: * zone The zone to check * * Returns: - * Non-zero if zone is exhausted. + * Non-zero if zone is exhausted. */ int uma_zone_exhausted(uma_zone_t zone); int uma_zone_exhausted_nolock(uma_zone_t zone); /* + * Common UMA_ZONE_PCPU zones. + */ +extern uma_zone_t pcpu_zone_64; +extern uma_zone_t pcpu_zone_ptr; + +/* * Exported statistics structures to be used by user space monitoring tools. * Statistics stream consists of a uma_stream_header, followed by a series of * alternative uma_type_header and uma_type_stat structures. */ #define UMA_STREAM_VERSION 0x00000001 struct uma_stream_header { - u_int32_t ush_version; /* Stream format version. */ - u_int32_t ush_maxcpus; /* Value of MAXCPU for stream. */ - u_int32_t ush_count; /* Number of records. */ - u_int32_t _ush_pad; /* Pad/reserved field. */ + uint32_t ush_version; /* Stream format version. */ + uint32_t ush_maxcpus; /* Value of MAXCPU for stream. */ + uint32_t ush_count; /* Number of records. */ + uint32_t _ush_pad; /* Pad/reserved field. */ }; #define UTH_MAX_NAME 32 @@ -615,32 +664,35 @@ struct uma_type_header { * Static per-zone data, some extracted from the supporting keg. */ char uth_name[UTH_MAX_NAME]; - u_int32_t uth_align; /* Keg: alignment. */ - u_int32_t uth_size; /* Keg: requested size of item. */ - u_int32_t uth_rsize; /* Keg: real size of item. */ - u_int32_t uth_maxpages; /* Keg: maximum number of pages. */ - u_int32_t uth_limit; /* Keg: max items to allocate. */ + uint32_t uth_align; /* Keg: alignment. */ + uint32_t uth_size; /* Keg: requested size of item. */ + uint32_t uth_rsize; /* Keg: real size of item. */ + uint32_t uth_maxpages; /* Keg: maximum number of pages. */ + uint32_t uth_limit; /* Keg: max items to allocate. */ /* * Current dynamic zone/keg-derived statistics. */ - u_int32_t uth_pages; /* Keg: pages allocated. */ - u_int32_t uth_keg_free; /* Keg: items free. */ - u_int32_t uth_zone_free; /* Zone: items free. */ - u_int32_t uth_bucketsize; /* Zone: desired bucket size. */ - u_int32_t uth_zone_flags; /* Zone: flags. */ - u_int64_t uth_allocs; /* Zone: number of allocations. */ - u_int64_t uth_frees; /* Zone: number of frees. */ - u_int64_t uth_fails; /* Zone: number of alloc failures. */ - u_int64_t uth_sleeps; /* Zone: number of alloc sleeps. */ - u_int64_t _uth_reserved1[2]; /* Reserved. */ + uint32_t uth_pages; /* Keg: pages allocated. */ + uint32_t uth_keg_free; /* Keg: items free. */ + uint32_t uth_zone_free; /* Zone: items free. */ + uint32_t uth_bucketsize; /* Zone: desired bucket size. */ + uint32_t uth_zone_flags; /* Zone: flags. */ + uint64_t uth_allocs; /* Zone: number of allocations. */ + uint64_t uth_frees; /* Zone: number of frees. */ + uint64_t uth_fails; /* Zone: number of alloc failures. */ + uint64_t uth_sleeps; /* Zone: number of alloc sleeps. */ + uint64_t _uth_reserved1[2]; /* Reserved. */ }; struct uma_percpu_stat { - u_int64_t ups_allocs; /* Cache: number of allocations. */ - u_int64_t ups_frees; /* Cache: number of frees. */ - u_int64_t ups_cache_free; /* Cache: free items in cache. */ - u_int64_t _ups_reserved[5]; /* Reserved. */ + uint64_t ups_allocs; /* Cache: number of allocations. */ + uint64_t ups_frees; /* Cache: number of frees. */ + uint64_t ups_cache_free; /* Cache: free items in cache. */ + uint64_t _ups_reserved[5]; /* Reserved. */ }; -#endif +void uma_reclaim_wakeup(void); +void uma_reclaim_worker(void *); + +#endif /* _VM_UMA_H_ */ |