A method and computing system for handling a page fault while executing a cross-platform system call with a shared page cache. A first kernel running in a first computer system receives a request for a faulted page associated with raw data from a second kernel running in a second computer system. In response to the request for the faulted page: (i) a first validity flag is updated to denote that the faulted page is unavailable to the first computer system in a first copy of the shared page cache and (ii) the faulted page is transmitted to the second kernel for insertion of the faulted page in a second copy of the shared page cache and for updating a second validity flag to denote that the faulted page is available to the second computer system in the second copy of the shared page cache.