title: How to confirm multiple processes shares mapping area,created using mmap with MAP_SHARED flag
body: <p>I have created two independent processes process1 and process2,which does mapping(using mmap with MAP_SHARED flag) to same file(or)object,in such a case the mapped area should be shared b/w processes. When i printed the return value of mmap system call of two processes the address printed was different,i believe the printed address is virtual address so its different but physical address might be same. Please correct me if iam wrong.</p>
  
  <p>After reading through threads in stack overflow i came to know that we cannot convert physical to virtual address from user space. So is there any other way i could confirm the mapped area is shared b/w process?.</p>