diff options
Diffstat (limited to 'sys/vm/vm_object.c')
| -rw-r--r-- | sys/vm/vm_object.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/sys/vm/vm_object.c b/sys/vm/vm_object.c index 3b3124c..10d58e7 100644 --- a/sys/vm/vm_object.c +++ b/sys/vm/vm_object.c @@ -222,6 +222,7 @@ _vm_object_allocate(objtype_t type, vm_pindex_t size, vm_object_t object) object->size = size; object->generation = 1; object->ref_count = 1; + object->memattr = VM_MEMATTR_DEFAULT; object->flags = 0; object->uip = NULL; object->charge = 0; @@ -290,6 +291,36 @@ vm_object_clear_flag(vm_object_t object, u_short bits) object->flags &= ~bits; } +/* + * Sets the default memory attribute for the specified object. Pages + * that are allocated to this object are by default assigned this memory + * attribute. + * + * Presently, this function must be called before any pages are allocated + * to the object. In the future, this requirement may be relaxed for + * "default" and "swap" objects. + */ +int +vm_object_set_memattr(vm_object_t object, vm_memattr_t memattr) +{ + + VM_OBJECT_LOCK_ASSERT(object, MA_OWNED); + switch (object->type) { + case OBJT_DEFAULT: + case OBJT_DEVICE: + case OBJT_PHYS: + case OBJT_SWAP: + case OBJT_VNODE: + if (!TAILQ_EMPTY(&object->memq)) + return (KERN_FAILURE); + break; + case OBJT_DEAD: + return (KERN_INVALID_ARGUMENT); + } + object->memattr = memattr; + return (KERN_SUCCESS); +} + void vm_object_pip_add(vm_object_t object, short i) { |
