* vm_object_terminate actually destroys the specified object, freeing * up all previously used resources. * * The object must be locked. * This routine may block. */
| 924 | * This routine may block. |
| 925 | */ |
| 926 | void |
| 927 | vm_object_terminate(vm_object_t object) |
| 928 | { |
| 929 | |
| 930 | VM_OBJECT_ASSERT_WLOCKED(object); |
| 931 | KASSERT((object->flags & OBJ_DEAD) != 0, |
| 932 | ("terminating non-dead obj %p", object)); |
| 933 | KASSERT((object->flags & OBJ_COLLAPSING) == 0, |
| 934 | ("terminating collapsing obj %p", object)); |
| 935 | KASSERT(object->backing_object == NULL, |
| 936 | ("terminating shadow obj %p", object)); |
| 937 | |
| 938 | /* |
| 939 | * Wait for the pageout daemon and other current users to be |
| 940 | * done with the object. Note that new paging_in_progress |
| 941 | * users can come after this wait, but they must check |
| 942 | * OBJ_DEAD flag set (without unlocking the object), and avoid |
| 943 | * the object being terminated. |
| 944 | */ |
| 945 | vm_object_pip_wait(object, "objtrm"); |
| 946 | |
| 947 | KASSERT(object->ref_count == 0, |
| 948 | ("vm_object_terminate: object with references, ref_count=%d", |
| 949 | object->ref_count)); |
| 950 | |
| 951 | if ((object->flags & OBJ_PG_DTOR) == 0) |
| 952 | vm_object_terminate_pages(object); |
| 953 | |
| 954 | #if VM_NRESERVLEVEL > 0 |
| 955 | if (__predict_false(!LIST_EMPTY(&object->rvq))) |
| 956 | vm_reserv_break_all(object); |
| 957 | #endif |
| 958 | |
| 959 | KASSERT(object->cred == NULL || object->type == OBJT_DEFAULT || |
| 960 | object->type == OBJT_SWAP, |
| 961 | ("%s: non-swap obj %p has cred", __func__, object)); |
| 962 | |
| 963 | /* |
| 964 | * Let the pager know object is dead. |
| 965 | */ |
| 966 | vm_pager_deallocate(object); |
| 967 | VM_OBJECT_WUNLOCK(object); |
| 968 | |
| 969 | vm_object_destroy(object); |
| 970 | } |
| 971 | |
| 972 | /* |
| 973 | * Make the page read-only so that we can clear the object flags. However, if |
no test coverage detected