MiReturnCommit

VOID __stdcall MiReturnCommit(_MI_PARTITION *Partition, UINT64 QuotaCharge){
  UINT64 v2; 
  struct _KPRCB *CurrentPrcb; 
  __int64 CachedCommit; 
  __int64 v6; 
  unsigned __int64 v7; 
  unsigned __int64 HighCommitThreshold; 
  unsigned __int64 LowCommitThreshold; 
  UINT64 v10; 
  _KLOCK_QUEUE_HANDLE LockHandle; 

  if( QuotaCharge )
  {
    v2 = QuotaCharge;
    memset(&LockHandle, 0, sizeof(LockHandle));
    if( !Partition->Commit.OverCommit
      || (KeAcquireInStackQueuedSpinLock(&Partition->Commit.EventLock, &LockHandle),
          LODWORD(v10) = MiRestockOverCommit((INT64)Partition, v2),
          v2 = v10,
          KeReleaseInStackQueuedSpinLockFromDpcLevel(&LockHandle),
          __writecr8(LockHandle.OldIrql),
          v2) )
    {
      if( Partition == &Irp
        && (CurrentPrcb = KeGetCurrentPrcb(),
            _m_prefetchw((const void *)&CurrentPrcb->CachedCommit),
            CachedCommit = CurrentPrcb->CachedCommit,
            v2 + CachedCommit <= 0x100) )
      {
        while( 1 )
        {
          v6 = _InterlockedCompareExchange(
                 (volatile signed __int32 *)&CurrentPrcb->CachedCommit,
                 CachedCommit + v2,
                 CachedCommit);
          if( v6 == CachedCommit )
            break;
          CachedCommit = v6;
          if( v6 + v2 > 0x100 )
            goto LABEL_7;
        }
      }
      else
      {
LABEL_7:
        v7 = _InterlockedExchangeAdd64((volatile signed __int64 *)&Partition->Vp.TotalCommittedPages, -(__int64)v2);
        HighCommitThreshold = Partition->Commit.HighCommitThreshold;
        if( v7 >= HighCommitThreshold && v7 - v2 < HighCommitThreshold
          || (LowCommitThreshold = Partition->Commit.LowCommitThreshold, v7 >= LowCommitThreshold)
          && v7 - v2 < LowCommitThreshold )
        {
          MiSyncCommitSignals(Partition, 0i64);
        }
      }
    }
  }
}

Referenced by: