I've long since been keeping up with these, because most
of the hardwired page flag definitions that are #define'd
in memory.c are not used anymore.  For example, there's
this construct in dump_mem_map() which just displays the
hex value:

  if (v22) {
       ...translate hardwired flags...
  } else if (THIS_KERNEL_VERSION > LINUX(2,4,9)) {
       fprintf(fp, "%lx\n", flags);
  } else {
       ...translate old hardwired
2.4 flags...
  }

But there are a few other places that need to know about
specific flags, like PG_reserved and PG_slab for example,
whose bits get determined in vm_init().  Which one has
changed that upsets "kmem -i"?

Dave