Marcus Clyne <maccaday@xxxxxxxxx> writes: > If a shared object is loaded using dlopen etc and the symbols in its > object aren't used (specifically they are defined elsewhere already > inside that process), is the data in the symbols automatically loaded > into memory or is it skipped (assuming there are no other programs > using those symbols on the system) and the memory available for other > purposes? If you open a shared library with dlopen, then that library is loaded into memory. This will use up virtual address space. If you don't use the library for anything, then the pages will never be loaded into RAM. Ian