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slab: fix early boot when having lots of cpus

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Matheus
2026-02-17 17:00:28 -03:00
parent eb72ca33cf
commit 32e174d00c
1 changed files with 13 additions and 12 deletions
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kernel-src/mm/slab.c
+13 -12
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@@ -18,11 +18,11 @@
#define SLAB_DEBUG 0
static slab_indirect_t *self_cache_indirect_table[32];
static scache_t *self_cache;
static scache_t *magazine_cache;
static scache_t *slab_cache;
static scache_t *indirect_cache;
static scache_t *indirect_table_cache;
static inline bool grow_cache(scache_t *cache) {
slab_t *slab;
@@ -387,16 +387,15 @@ void slab_free(scache_t *cache, void *addr) {
#define MAGAZINE_SIZE 8
static bool slab_initialize(scache_t *cache, size_t size, size_t alignment, bool (*ctor)(scache_t *, void *), void (*dtor)(scache_t *, void *), slab_indirect_t **indirect_table) {
static bool slab_initialize(scache_t *cache, size_t size, size_t alignment, bool (*ctor)(scache_t *, void *), void (*dtor)(scache_t *, void *)) {
if (alignment == 0)
alignment = 8;
if (size >= SLAB_INDIRECT_CUTOFF && indirect_table == NULL) {
cache->indirect_table = alloc(sizeof(slab_indirect_t *) * 32);
if (size >= SLAB_INDIRECT_CUTOFF) {
cache->indirect_table = slab_allocate(indirect_table_cache);
if (cache->indirect_table == NULL)
return false;
} else if (size >= SLAB_INDIRECT_CUTOFF && indirect_table) {
cache->indirect_table = indirect_table;
memset(cache->indirect_table, 0, sizeof(slab_indirect_t *) * 32);
}
cache->size = size;
@@ -432,7 +431,7 @@ scache_t *slab_newcache(size_t size, size_t alignment, bool (*ctor)(scache_t *,
if (cache == NULL)
return NULL;
if (!slab_initialize(cache, size, alignment, ctor, dtor, NULL)) {
if (!slab_initialize(cache, size, alignment, ctor, dtor)) {
slab_free(self_cache, cache);
return NULL;
}
@@ -455,11 +454,11 @@ static bool magazine_ctor(scache_t *, void *obj) {
return true;
}
static scache_t *create_new_from_vmm(size_t size, size_t alignment, bool (*ctor)(scache_t *, void *), void (*dtor)(scache_t *, void *), slab_indirect_t **table) {
static scache_t *create_new_from_vmm(size_t size, size_t alignment, bool (*ctor)(scache_t *, void *), void (*dtor)(scache_t *, void *)) {
size_t cache_size = sizeof(scache_t) + sizeof(cache_per_cpu_t) * arch_smp_get_cpu_count();
scache_t *cache = vmm_map(NULL, cache_size, VMM_FLAGS_ALLOCATE, ARCH_MMU_FLAGS_READ | ARCH_MMU_FLAGS_WRITE | ARCH_MMU_FLAGS_NOEXEC, NULL);
__assert(cache);
__assert(slab_initialize(cache, size, alignment, ctor, dtor, table));
__assert(slab_initialize(cache, size, alignment, ctor, dtor));
return cache;
}
@@ -467,11 +466,13 @@ static scache_t *create_new_from_vmm(size_t size, size_t alignment, bool (*ctor)
void slab_init(void) {
size_t cache_size = sizeof(scache_t) + sizeof(cache_per_cpu_t) * arch_smp_get_cpu_count();
// the cache of caches needs for the slab and indirect caches to be up
slab_cache = create_new_from_vmm(sizeof(slab_t), 0, NULL, NULL, self_cache_indirect_table);
indirect_cache = create_new_from_vmm(sizeof(slab_indirect_t), 0, NULL, NULL, NULL);
self_cache = create_new_from_vmm(cache_size, 0, NULL, NULL, NULL);
slab_cache = create_new_from_vmm(sizeof(slab_t), 0, NULL, NULL);
indirect_cache = create_new_from_vmm(sizeof(slab_indirect_t), 0, NULL, NULL);
indirect_table_cache = create_new_from_vmm(sizeof(slab_indirect_t *) * 32, 0, NULL, NULL);
self_cache = create_new_from_vmm(cache_size, 0, NULL, NULL);
magazine_cache = slab_newcache(sizeof(magazine_t) + sizeof(void *) * MAGAZINE_SIZE, 0, magazine_ctor, NULL);
__assert(magazine_cache);
}
INIT_ROUTINE_DEFINE(slab, INIT_ROUTINE_FLAGS_NONE, slab_init, vmm);