This counter counts faults resolved because the referenced page was already mapped and valid in the shared, systemwide global page tables, so no I/O was needed at all. A high count here reflects effective use of globally shared code or data, such as shared images or libraries, which reduces redundant memory use and I/O across processes. For example, when many user processes running the same shared executable image reference its code pages for the first time, those faults resolve instantly via this global-valid path.