typedef struct _MMWSL
{
     ULONG FirstFree;
     ULONG FirstDynamic;
     ULONG LastEntry;
     ULONG NextSlot;
     PMMWSLE Wsle;
     PVOID LowestPagableAddress;
     ULONG LastInitializedWsle;
     ULONG NextEstimationSlot;
     ULONG NextAgingSlot;
     ULONG EstimatedAvailable;
     ULONG GrowthSinceLastEstimate;
     ULONG NumberOfCommittedPageTables;
     ULONG VadBitMapHint;
     ULONG NonDirectCount;
     PMMWSLE_NONDIRECT_HASH NonDirectHash;
     PMMWSLE_HASH HashTableStart;
     PMMWSLE_HASH HighestPermittedHashAddress;
     PVOID HighestUserAddress;
     WORD UsedPageTableEntries[1536];
     ULONG CommittedPageTables[48];
} MMWSL, *PMMWSL;

Windows Vista Kernel Structures