diff options
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/subr_vmem.c | 26 |
1 files changed, 17 insertions, 9 deletions
diff --git a/sys/kern/subr_vmem.c b/sys/kern/subr_vmem.c index f3f3eecee93d..3b70738389bb 100644 --- a/sys/kern/subr_vmem.c +++ b/sys/kern/subr_vmem.c @@ -70,7 +70,10 @@ __FBSDID("$FreeBSD$"); #include <vm/vm_param.h> #include <vm/vm_pageout.h> -#define VMEM_MAXORDER (sizeof(vmem_size_t) * NBBY) +#define VMEM_OPTORDER 5 +#define VMEM_OPTVALUE (1 << VMEM_OPTORDER) +#define VMEM_MAXORDER \ + (VMEM_OPTVALUE - 1 + sizeof(vmem_size_t) * NBBY - VMEM_OPTORDER) #define VMEM_HASHSIZE_MIN 16 #define VMEM_HASHSIZE_MAX 131072 @@ -200,8 +203,10 @@ static LIST_HEAD(, vmem) vmem_list = LIST_HEAD_INITIALIZER(vmem_list); #define VMEM_CROSS_P(addr1, addr2, boundary) \ ((((addr1) ^ (addr2)) & -(boundary)) != 0) -#define ORDER2SIZE(order) ((vmem_size_t)1 << (order)) -#define SIZE2ORDER(size) ((int)flsl(size) - 1) +#define ORDER2SIZE(order) ((order) < VMEM_OPTVALUE ? ((order) + 1) : \ + (vmem_size_t)1 << ((order) - (VMEM_OPTVALUE - VMEM_OPTORDER - 1))) +#define SIZE2ORDER(size) ((size) <= VMEM_OPTVALUE ? ((size) - 1) : \ + (flsl(size) + (VMEM_OPTVALUE - VMEM_OPTORDER - 2))) /* * Maximum number of boundary tags that may be required to satisfy an @@ -334,11 +339,14 @@ bt_free(vmem_t *vm, bt_t *bt) /* * freelist[0] ... [1, 1] - * freelist[1] ... [2, 3] - * freelist[2] ... [4, 7] - * freelist[3] ... [8, 15] + * freelist[1] ... [2, 2] * : - * freelist[n] ... [(1 << n), (1 << (n + 1)) - 1] + * freelist[29] ... [30, 30] + * freelist[30] ... [31, 31] + * freelist[31] ... [32, 63] + * freelist[33] ... [64, 127] + * : + * freelist[n] ... [(1 << (n - 26)), (1 << (n - 25)) - 1] * : */ @@ -979,6 +987,7 @@ vmem_init(vmem_t *vm, const char *name, vmem_addr_t base, vmem_size_t size, int i; MPASS(quantum > 0); + MPASS((quantum & (quantum - 1)) == 0); bzero(vm, sizeof(*vm)); @@ -988,8 +997,7 @@ vmem_init(vmem_t *vm, const char *name, vmem_addr_t base, vmem_size_t size, LIST_INIT(&vm->vm_freetags); strlcpy(vm->vm_name, name, sizeof(vm->vm_name)); vm->vm_quantum_mask = quantum - 1; - vm->vm_quantum_shift = SIZE2ORDER(quantum); - MPASS(ORDER2SIZE(vm->vm_quantum_shift) == quantum); + vm->vm_quantum_shift = flsl(quantum) - 1; vm->vm_nbusytag = 0; vm->vm_size = 0; vm->vm_inuse = 0; |