!chklowmem
The !chklowmem extension determines whether physical memory pages below 4 GB are filled with the required fill pattern on a computer that was booted with the /pae and /nolowmem options.
!chklowmem
DLL
Kdexts.dll
Remarks
This extension is useful when you are verifying that kernel-mode drivers operate properly with physical memory above the 4 GB boundary. Typically, drivers fail by truncating a physical address to 32 bits and then in writing below the 4 GB boundary. The !chklowmem extension will detect any writes below the 4 GB boundary.
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