Min version	10 Pre RTM
Max version	10 TH2
x86 offset offset:bitpos	Field Name
0x0000:0x00	uint16_t Invalid
0x0000	void * AllBits
0x0000:0x01	uint16_t AllocationInProgress
0x0000:0x02	uint16_t Spare0
0x0002	uint16_t UsageData