How to know whether a copy-on-write page is an actual copy?

Good, following the advice of MarkR, I gave it a shot to go through the pagemap and kpageflags interface. Below a quick test to check whether a page is in memory 'SWAPBACKED' as it is called. One problem remains of course, which is the problem that kpageflags is only accessible to the root. int main(int argc, char* argv[]) { unsigned long long pagesize=getpagesize(); assert(pagesize>0); int pageco

[syuu1228]

How to know whether a copy-on-write page is an actual copy?