Function - Instruct kernel to zero-fill pages as requested data does not exist.
[in memory-cache-control send right]
The memory cache control port
to be used by the memory manager for cache management requests.
This port is provided by the kernel in a memory_object_init or a
The offset within the memory object, in bytes.
The number of bytes of data (starting at offset). The number
must convert to an integral number of memory object pages.
The memory_object_data_unavailable function indicates
that the memory
manager cannot provide the kernel with the data requested for
the given region.
Instead, the kernel should provide the data for this region.
A memory manager can use this call in any of the following situations:
When the object was created by the kernel
(via memory_object_create) and
the kernel has not yet provided data for the region (via either
memory_object_data_initialize or memory_object_data_return).
In this case, the
object is a temporary memory object; the memory manager is the default
memory manager; and the kernel should provide zero-filled pages for the
When the object is a normal user-created memory object. In this case, the
kernel should provide zero-filled pages for the region.
Only generic errors apply.