Virtual memory to physical memory.

gistfile1.sh

$ ps -o rss,command | grep ./omg | grep -v grep
   488 ./omg
$ ps -o rss,command | grep ./omg | grep -v grep
 10268 ./omg

omg.c

#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <unistd.h>

int main() {
  int* lol = malloc(sizeof(int) * 10000000); 

  sleep(10);
  printf("Touching memory pages..\n");

  for (size_t i = 1; i < 10000000; i += getpagesize()) 
    lol[i] = 82;

  printf("Done touching memory pages..\n");
  sleep(10);

  return 0;
}