SYSTEM_POOL_ENTRY - NtDoc

#ifndef _NTEXAPI_H

typedef struct _SYSTEM_POOL_ENTRY
{
    BOOLEAN Allocated;
    BOOLEAN Spare0;
    USHORT AllocatorBackTraceIndex;
    ULONG Size;
    union
    {
        UCHAR Tag[4];
        ULONG TagUlong;
        PVOID ProcessChargedQuota;
    };
} SYSTEM_POOL_ENTRY, *PSYSTEM_POOL_ENTRY;

#endif
View code on GitHub