diff options
Diffstat (limited to 'include/linux/slab.h')
| -rw-r--r-- | include/linux/slab.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/slab.h b/include/linux/slab.h index 6dc300bac2a1..cf443f064a66 100644 --- a/include/linux/slab.h +++ b/include/linux/slab.h @@ -335,6 +335,37 @@ struct kmem_cache_args { * %NULL means no constructor. */ void (*ctor)(void *); + /** + * @sheaf_capacity: Enable sheaves of given capacity for the cache. + * + * With a non-zero value, allocations from the cache go through caching + * arrays called sheaves. Each cpu has a main sheaf that's always + * present, and a spare sheaf that may be not present. When both become + * empty, there's an attempt to replace an empty sheaf with a full sheaf + * from the per-node barn. + * + * When no full sheaf is available, and gfp flags allow blocking, a + * sheaf is allocated and filled from slab(s) using bulk allocation. + * Otherwise the allocation falls back to the normal operation + * allocating a single object from a slab. + * + * Analogically when freeing and both percpu sheaves are full, the barn + * may replace it with an empty sheaf, unless it's over capacity. In + * that case a sheaf is bulk freed to slab pages. + * + * The sheaves do not enforce NUMA placement of objects, so allocations + * via kmem_cache_alloc_node() with a node specified other than + * NUMA_NO_NODE will bypass them. + * + * Bulk allocation and free operations also try to use the cpu sheaves + * and barn, but fallback to using slab pages directly. + * + * When slub_debug is enabled for the cache, the sheaf_capacity argument + * is ignored. + * + * %0 means no sheaves will be created. + */ + unsigned int sheaf_capacity; }; struct kmem_cache *__kmem_cache_create_args(const char *name, @@ -474,6 +505,7 @@ void * __must_check krealloc_node_align_noprof(const void *objp, size_t new_size #define krealloc(...) krealloc_node(__VA_ARGS__, NUMA_NO_NODE) void kfree(const void *objp); +void kfree_nolock(const void *objp); void kfree_sensitive(const void *objp); size_t __ksize(const void *objp); @@ -802,6 +834,22 @@ void *kmem_cache_alloc_node_noprof(struct kmem_cache *s, gfp_t flags, int node) __assume_slab_alignment __malloc; #define kmem_cache_alloc_node(...) alloc_hooks(kmem_cache_alloc_node_noprof(__VA_ARGS__)) +struct slab_sheaf * +kmem_cache_prefill_sheaf(struct kmem_cache *s, gfp_t gfp, unsigned int size); + +int kmem_cache_refill_sheaf(struct kmem_cache *s, gfp_t gfp, + struct slab_sheaf **sheafp, unsigned int size); + +void kmem_cache_return_sheaf(struct kmem_cache *s, gfp_t gfp, + struct slab_sheaf *sheaf); + +void *kmem_cache_alloc_from_sheaf_noprof(struct kmem_cache *cachep, gfp_t gfp, + struct slab_sheaf *sheaf) __assume_slab_alignment __malloc; +#define kmem_cache_alloc_from_sheaf(...) \ + alloc_hooks(kmem_cache_alloc_from_sheaf_noprof(__VA_ARGS__)) + +unsigned int kmem_cache_sheaf_size(struct slab_sheaf *sheaf); + /* * These macros allow declaring a kmem_buckets * parameter alongside size, which * can be compiled out with CONFIG_SLAB_BUCKETS=n so that a large number of call @@ -914,6 +962,9 @@ static __always_inline __alloc_size(1) void *kmalloc_noprof(size_t size, gfp_t f } #define kmalloc(...) alloc_hooks(kmalloc_noprof(__VA_ARGS__)) +void *kmalloc_nolock_noprof(size_t size, gfp_t gfp_flags, int node); +#define kmalloc_nolock(...) alloc_hooks(kmalloc_nolock_noprof(__VA_ARGS__)) + #define kmem_buckets_alloc(_b, _size, _flags) \ alloc_hooks(__kmalloc_node_noprof(PASS_BUCKET_PARAMS(_size, _b), _flags, NUMA_NO_NODE)) |