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Lock some manipulations of the vm object's flags.

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This commit is contained in:
Alan Cox 2003-04-13 20:22:02 +00:00
parent b077a36297
commit e2479b4fc3
2 changed files with 6 additions and 4 deletions
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8
sys/vm/vm_map.c
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@ -2286,9 +2286,9 @@ vm_map_copy_entry(
}
vm_object_reference(src_object);
vm_object_lock(src_object);
VM_OBJECT_LOCK(src_object);
vm_object_clear_flag(src_object, OBJ_ONEMAPPING);
vm_object_unlock(src_object);
VM_OBJECT_UNLOCK(src_object);
dst_entry->object.vm_object = src_object;
src_entry->eflags |= (MAP_ENTRY_COW|MAP_ENTRY_NEEDS_COPY);
dst_entry->eflags |= (MAP_ENTRY_COW|MAP_ENTRY_NEEDS_COPY);
@ -2378,9 +2378,9 @@ vmspace_fork(struct vmspace *vm1)
vm_object_deallocate(object);
object = old_entry->object.vm_object;
}
vm_object_lock(object);
VM_OBJECT_LOCK(object);
vm_object_clear_flag(object, OBJ_ONEMAPPING);
vm_object_unlock(object);
VM_OBJECT_UNLOCK(object);
/*
* Clone the entry, referencing the shared object.

2
sys/vm/vm_object.c
View File

@ -1171,7 +1171,9 @@ vm_object_split(vm_map_entry_t entry)
vm_object_reference(source); /* Referenced by new_object */
TAILQ_INSERT_TAIL(&source->shadow_head,
new_object, shadow_list);
VM_OBJECT_LOCK(source);
vm_object_clear_flag(source, OBJ_ONEMAPPING);
VM_OBJECT_UNLOCK(source);
new_object->backing_object_offset =
orig_object->backing_object_offset + offset;
new_object->backing_object = source;