MmSetMemoryPriorityProcess

VOID __stdcall MmSetMemoryPriorityProcess(_EPROCESS *Process, INT16 MemoryPriority){
  char v2; 
  struct _KLOCK_QUEUE_HANDLE LockHandle; 
  v2 = MemoryPriority;
  memset(&LockHandle, 0, sizeof(LockHandle));
  KeAcquireInStackQueuedSpinLock(&WorkerRoutine, &LockHandle);
  *((_BYTE *)Process + 1850) = v2;
  KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockHandle);
  __writecr8(LockHandle.OldIrql);
}

Referenced by:

NtSetInformationProcess
PspComputeQuantumAndPriority