typedef struct _POOL_TRACKER_TABLE
{
     LONG Key;
     LONG NonPagedAllocs;
     LONG NonPagedFrees;
     ULONG NonPagedBytes;
     ULONG PagedAllocs;
     ULONG PagedFrees;
     ULONG PagedBytes;
} POOL_TRACKER_TABLE, *PPOOL_TRACKER_TABLE;

Windows Vista Kernel Structures