MmGetNumberOfFreeSystemPtes

INT64 __fastcall MmGetNumberOfFreeSystemPtes(){
  unsigned int NumberOfCachedPtes; 
  __int64 v1; 
  unsigned __int64 v2; 
  NumberOfCachedPtes = MiGetNumberOfCachedPtes((INT64)&qword_140C4EC80);
  v2 = qword_140C4ECD8 + NumberOfCachedPtes + v1;
  if( v2 >= 0x100000000i64 )
    LODWORD(v2) = -1;
  return(unsigned int)v2;
}

Referenced by:

ExpQuerySystemPerformanceInformation
MiIssueNoPtesBugcheck