Protecting Data

The service that is listed in this section can change the storage protect keys in a page range.

The vm_protectp service can change the storage protect keys in a page range in one client storage virtual memory object. This only acts on the resident pages. The pages are referred to through the virtual memory object. They do not need to be addressable in the current address space. A client file system data provider uses this protection to detect stores of in-memory data, so that mapped files can be extended by storing into them beyond their current end of file.