struct _SUBSECTION// Size=0x28
{
    struct _CONTROL_AREA * ControlArea;// Offset=0x0 Size=0x4
    struct _MMPTE * SubsectionBase;// Offset=0x4 Size=0x4
    struct _SUBSECTION * NextSubsection;// Offset=0x8 Size=0x4
    struct _RTL_AVL_TREE GlobalPerSessionHead;// Offset=0xc Size=0x4
    struct _MI_CONTROL_AREA_WAIT_BLOCK * CreationWaitList;// Offset=0xc Size=0x4
    struct _MI_PER_SESSION_PROTOS * SessionDriverProtos;// Offset=0xc Size=0x4
    union _unnamed_638 u;// Offset=0x10 Size=0x4
    unsigned long StartingSector;// Offset=0x14 Size=0x4
    unsigned long NumberOfFullSectors;// Offset=0x18 Size=0x4
    unsigned long PtesInSubsection;// Offset=0x1c Size=0x4
    union _unnamed_639 u1;// Offset=0x20 Size=0x4
    unsigned long UnusedPtes:30;// Offset=0x24 Size=0x4 BitOffset=0x0 BitSize=0x1e
    unsigned long ExtentQueryNeeded:1;// Offset=0x24 Size=0x4 BitOffset=0x1e BitSize=0x1
    unsigned long DirtyPages:1;// Offset=0x24 Size=0x4 BitOffset=0x1f BitSize=0x1
    struct _unnamed_640 u2;// Offset=0x24 Size=0x4
};