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vmem_alloc: round-up size only when necessary. suggested by Andrew Doran.

This commit is contained in:
yamt 2007-12-22 01:11:37 +00:00
parent 2294b0bcb6
commit bf162a4cf7
1 changed files with 5 additions and 7 deletions
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12
sys/kern/subr_vmem.c
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@ -1,4 +1,4 @@
/* $NetBSD: subr_vmem.c,v 1.37 2007/12/13 02:45:10 yamt Exp $ */
/* $NetBSD: subr_vmem.c,v 1.38 2007/12/22 01:11:37 yamt Exp $ */
/*-
* Copyright (c)2006 YAMAMOTO Takashi,
@ -38,7 +38,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: subr_vmem.c,v 1.37 2007/12/13 02:45:10 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: subr_vmem.c,v 1.38 2007/12/22 01:11:37 yamt Exp $");
#define VMEM_DEBUG
#if defined(_KERNEL)
@ -848,15 +848,13 @@ vmem_roundup_size(vmem_t *vm, vmem_size_t size)
*/
vmem_addr_t
vmem_alloc(vmem_t *vm, vmem_size_t size0, vm_flag_t flags)
vmem_alloc(vmem_t *vm, vmem_size_t size, vm_flag_t flags)
{
const vmem_size_t size __unused = vmem_roundup_size(vm, size0);
const vm_flag_t strat __unused = flags & VM_FITMASK;
KASSERT((flags & (VM_SLEEP|VM_NOSLEEP)) != 0);
KASSERT((~flags & (VM_SLEEP|VM_NOSLEEP)) != 0);
KASSERT(size0 > 0);
KASSERT(size > 0);
KASSERT(strat == VM_BESTFIT || strat == VM_INSTANTFIT);
if ((flags & VM_SLEEP) != 0) {
@ -865,7 +863,7 @@ vmem_alloc(vmem_t *vm, vmem_size_t size0, vm_flag_t flags)
#if defined(QCACHE)
if (size <= vm->vm_qcache_max) {
int qidx = size >> vm->vm_quantum_shift;
int qidx = (size + vm->vm_quantum_mask) >> vm->vm_quantum_shift;
qcache_t *qc = vm->vm_qcache[qidx - 1];
return (vmem_addr_t)pool_cache_get(qc->qc_cache,
@ -873,7 +871,7 @@ vmem_alloc(vmem_t *vm, vmem_size_t size0, vm_flag_t flags)
}
#endif /* defined(QCACHE) */
return vmem_xalloc(vm, size0, 0, 0, 0, 0, 0, flags);
return vmem_xalloc(vm, size, 0, 0, 0, 0, 0, flags);
}
vmem_addr_t