• Alan Cox's avatar
    MFp4 alc_popmap · ec179322
    Alan Cox authored
      Change the way that reservations keep track of which pages are in use.
      Instead of using the page's PG_CACHED and PG_FREE flags, maintain a bit
      vector within the reservation.  This approach has a couple benefits.
      First, it makes breaking reservations much cheaper because there are
      fewer cache misses to identify the unused pages.  Second, it is a pre-
      requisite for supporting two or more reservation sizes.