diff options
Diffstat (limited to 'kern/slab.c')
| -rw-r--r-- | kern/slab.c | 140 |
1 files changed, 47 insertions, 93 deletions
diff --git a/kern/slab.c b/kern/slab.c index 8bc1b06b..a887cbb5 100644 --- a/kern/slab.c +++ b/kern/slab.c @@ -87,6 +87,7 @@ #include <mach/vm_param.h> #include <mach/machine/vm_types.h> #include <vm/vm_kern.h> +#include <vm/vm_page.h> #include <vm/vm_types.h> #include <sys/types.h> @@ -217,9 +218,7 @@ * * The flags don't change once set and can be tested without locking. */ -#define KMEM_CF_NO_CPU_POOL 0x01 /* CPU pool layer disabled */ #define KMEM_CF_SLAB_EXTERNAL 0x02 /* Slab data is off slab */ -#define KMEM_CF_NO_RECLAIM 0x04 /* Slabs are not reclaimable */ #define KMEM_CF_VERIFY 0x08 /* Debugging facilities enabled */ #define KMEM_CF_DIRECT 0x10 /* No buf-to-slab tree lookup */ @@ -384,24 +383,6 @@ static inline void * kmem_bufctl_to_buf(union kmem_bufctl *bufctl, return (void *)bufctl - cache->bufctl_dist; } -static vm_offset_t kmem_pagealloc(vm_size_t size) -{ - vm_offset_t addr; - kern_return_t kr; - - kr = kmem_alloc_wired(kmem_map, &addr, size); - - if (kr != KERN_SUCCESS) - return 0; - - return addr; -} - -static void kmem_pagefree(vm_offset_t ptr, vm_size_t size) -{ - kmem_free(kmem_map, ptr, size); -} - static void kmem_slab_create_verify(struct kmem_slab *slab, struct kmem_cache *cache) { @@ -430,30 +411,27 @@ static void kmem_slab_create_verify(struct kmem_slab *slab, static struct kmem_slab * kmem_slab_create(struct kmem_cache *cache, size_t color) { + struct vm_page *page; struct kmem_slab *slab; union kmem_bufctl *bufctl; size_t buf_size; unsigned long buffers; void *slab_buf; - if (cache->slab_alloc_fn == NULL) - slab_buf = (void *)kmem_pagealloc(cache->slab_size); - else - slab_buf = (void *)cache->slab_alloc_fn(cache->slab_size); + page = vm_page_alloc_pa(cache->slab_order, + VM_PAGE_SEL_DIRECTMAP, + VM_PT_KMEM); - if (slab_buf == NULL) + if (page == NULL) return NULL; + slab_buf = (void *)phystokv(vm_page_to_pa(page)); + if (cache->flags & KMEM_CF_SLAB_EXTERNAL) { - assert(!(cache->flags & KMEM_CF_NO_RECLAIM)); slab = (struct kmem_slab *)kmem_cache_alloc(&kmem_slab_cache); if (slab == NULL) { - if (cache->slab_free_fn == NULL) - kmem_pagefree((vm_offset_t)slab_buf, cache->slab_size); - else - cache->slab_free_fn((vm_offset_t)slab_buf, cache->slab_size); - + vm_page_free_pa(page, cache->slab_order); return NULL; } } else { @@ -514,21 +492,19 @@ static void kmem_slab_destroy_verify(struct kmem_slab *slab, */ static void kmem_slab_destroy(struct kmem_slab *slab, struct kmem_cache *cache) { + struct vm_page *page; vm_offset_t slab_buf; assert(slab->nr_refs == 0); assert(slab->first_free != NULL); - assert(!(cache->flags & KMEM_CF_NO_RECLAIM)); if (cache->flags & KMEM_CF_VERIFY) kmem_slab_destroy_verify(slab, cache); slab_buf = (vm_offset_t)P2ALIGN((unsigned long)slab->addr, PAGE_SIZE); - - if (cache->slab_free_fn == NULL) - kmem_pagefree(slab_buf, cache->slab_size); - else - cache->slab_free_fn(slab_buf, cache->slab_size); + page = vm_page_lookup_pa(kvtophys(slab_buf)); + assert(page != NULL); + vm_page_free_pa(page, cache->slab_order); if (cache->flags & KMEM_CF_SLAB_EXTERNAL) kmem_cache_free(&kmem_slab_cache, (vm_offset_t)slab); @@ -702,9 +678,10 @@ static void kmem_cache_error(struct kmem_cache *cache, void *buf, int error, */ static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags) { - size_t i, buffers, buf_size, slab_size, free_slab_size, optimal_size = 0; - size_t waste, waste_min; - int embed, optimal_embed = 0; + size_t i, buffers, buf_size, slab_size, free_slab_size; + size_t waste, waste_min, optimal_size = optimal_size; + int embed, optimal_embed = optimal_embed; + unsigned int slab_order, optimal_order = optimal_order; buf_size = cache->buf_size; @@ -716,7 +693,9 @@ static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags) do { i++; - slab_size = P2ROUND(i * buf_size, PAGE_SIZE); + + slab_order = vm_page_order(i * buf_size); + slab_size = PAGE_SIZE << slab_order; free_slab_size = slab_size; if (flags & KMEM_CACHE_NOOFFSLAB) @@ -739,19 +718,19 @@ static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags) if (waste <= waste_min) { waste_min = waste; + optimal_order = slab_order; optimal_size = slab_size; optimal_embed = embed; } } while ((buffers < KMEM_MIN_BUFS_PER_SLAB) && (slab_size < KMEM_SLAB_SIZE_THRESHOLD)); - assert(optimal_size > 0); assert(!(flags & KMEM_CACHE_NOOFFSLAB) || optimal_embed); + cache->slab_order = optimal_order; cache->slab_size = optimal_size; - slab_size = cache->slab_size - (optimal_embed - ? sizeof(struct kmem_slab) - : 0); + slab_size = cache->slab_size + - (optimal_embed ? sizeof(struct kmem_slab) : 0); cache->bufs_per_slab = slab_size / buf_size; cache->color_max = slab_size % buf_size; @@ -767,9 +746,8 @@ static void kmem_cache_compute_sizes(struct kmem_cache *cache, int flags) } void kmem_cache_init(struct kmem_cache *cache, const char *name, - size_t obj_size, size_t align, kmem_cache_ctor_t ctor, - kmem_slab_alloc_fn_t slab_alloc_fn, - kmem_slab_free_fn_t slab_free_fn, int flags) + size_t obj_size, size_t align, + kmem_cache_ctor_t ctor, int flags) { #if SLAB_USE_CPU_POOLS struct kmem_cpu_pool_type *cpu_pool_type; @@ -783,15 +761,6 @@ void kmem_cache_init(struct kmem_cache *cache, const char *name, cache->flags = 0; #endif /* SLAB_VERIFY */ - if (flags & KMEM_CACHE_NOCPUPOOL) - cache->flags |= KMEM_CF_NO_CPU_POOL; - - if (flags & KMEM_CACHE_NORECLAIM) { - assert(slab_free_fn == NULL); - flags |= KMEM_CACHE_NOOFFSLAB; - cache->flags |= KMEM_CF_NO_RECLAIM; - } - if (flags & KMEM_CACHE_VERIFY) cache->flags |= KMEM_CF_VERIFY; @@ -819,8 +788,6 @@ void kmem_cache_init(struct kmem_cache *cache, const char *name, cache->nr_slabs = 0; cache->nr_free_slabs = 0; cache->ctor = ctor; - cache->slab_alloc_fn = slab_alloc_fn; - cache->slab_free_fn = slab_free_fn; strncpy(cache->name, name, sizeof(cache->name)); cache->name[sizeof(cache->name) - 1] = '\0'; cache->buftag_dist = 0; @@ -908,9 +875,6 @@ static void kmem_cache_reap(struct kmem_cache *cache) struct list dead_slabs; unsigned long nr_free_slabs; - if (cache->flags & KMEM_CF_NO_RECLAIM) - return; - simple_lock(&cache->lock); list_set_head(&dead_slabs, &cache->free_slabs); list_init(&cache->free_slabs); @@ -1297,7 +1261,7 @@ void slab_init(void) sprintf(name, "kmem_cpu_array_%d", cpu_pool_type->array_size); size = sizeof(void *) * cpu_pool_type->array_size; kmem_cache_init(cpu_pool_type->array_cache, name, size, - cpu_pool_type->array_align, NULL, NULL, NULL, 0); + cpu_pool_type->array_align, NULL, 0); } #endif /* SLAB_USE_CPU_POOLS */ @@ -1305,25 +1269,7 @@ void slab_init(void) * Prevent off slab data for the slab cache to avoid infinite recursion. */ kmem_cache_init(&kmem_slab_cache, "kmem_slab", sizeof(struct kmem_slab), - 0, NULL, NULL, NULL, KMEM_CACHE_NOOFFSLAB); -} - -static vm_offset_t kalloc_pagealloc(vm_size_t size) -{ - vm_offset_t addr; - kern_return_t kr; - - kr = kmem_alloc_wired(kmem_map, &addr, size); - - if (kr != KERN_SUCCESS) - return 0; - - return addr; -} - -static void kalloc_pagefree(vm_offset_t ptr, vm_size_t size) -{ - kmem_free(kmem_map, ptr, size); + 0, NULL, KMEM_CACHE_NOOFFSLAB); } void kalloc_init(void) @@ -1335,8 +1281,7 @@ void kalloc_init(void) for (i = 0; i < ARRAY_SIZE(kalloc_caches); i++) { sprintf(name, "kalloc_%lu", size); - kmem_cache_init(&kalloc_caches[i], name, size, 0, NULL, - kalloc_pagealloc, kalloc_pagefree, 0); + kmem_cache_init(&kalloc_caches[i], name, size, 0, NULL, 0); size <<= 1; } } @@ -1387,8 +1332,18 @@ vm_offset_t kalloc(vm_size_t size) if ((buf != 0) && (cache->flags & KMEM_CF_VERIFY)) kalloc_verify(cache, buf, size); - } else - buf = (void *)kalloc_pagealloc(size); + } else { + struct vm_page *page; + + page = vm_page_alloc_pa(vm_page_order(size), + VM_PAGE_SEL_DIRECTMAP, + VM_PT_KERNEL); + + if (page == NULL) + return 0; + + buf = (void *)phystokv(vm_page_to_pa(page)); + } return (vm_offset_t)buf; } @@ -1429,7 +1384,10 @@ void kfree(vm_offset_t data, vm_size_t size) kmem_cache_free(cache, data); } else { - kalloc_pagefree(data, size); + struct vm_page *page; + + page = vm_page_lookup_pa(kvtophys(data)); + vm_page_free_pa(page, vm_page_order(size)); } } @@ -1529,12 +1487,8 @@ kern_return_t host_slab_info(host_t host, cache_info_array_t *infop, list_for_each_entry(&kmem_cache_list, cache, node) { simple_lock(&cache->lock); - info[i].flags = ((cache->flags & KMEM_CF_NO_CPU_POOL) - ? CACHE_FLAGS_NO_CPU_POOL : 0) - | ((cache->flags & KMEM_CF_SLAB_EXTERNAL) - ? CACHE_FLAGS_SLAB_EXTERNAL : 0) - | ((cache->flags & KMEM_CF_NO_RECLAIM) - ? CACHE_FLAGS_NO_RECLAIM : 0) + info[i].flags = ((cache->flags & KMEM_CF_SLAB_EXTERNAL) + ? CACHE_FLAGS_SLAB_EXTERNAL : 0) | ((cache->flags & KMEM_CF_VERIFY) ? CACHE_FLAGS_VERIFY : 0) | ((cache->flags & KMEM_CF_DIRECT) |