GH_RSRVPGCNT

   GH_RSRVPGCNT specifies the number of pages in the resident image
   code granularity hint region that the Install utility can use
   after the system has finished booting.

   If bit 2 of the LOAD_SYS_IMAGES parameter is set, the image
   LDR$WRAPUP releases all unused pages in the granularity hint
   region at the the end of system startup. The unused pages of the
   resident image granularity hint region are either reserved for
   future use, or given back to the free memory list.

   GH_RSRVPGCNT specifies the number of pages that LDR$WRAPUP
   attempts to leave in the resident image code granularity hint
   region. If the GH_RSRVPGCNT number of pages is larger than the
   unused pages in the granularity hint region, the region is not
   expanded to accommodate the number of pages requested.

   GH_RSRVPGCNT is a FEEDBACK attribute parameter.