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MmQuerySystemSize function (wdm.h)

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The MmQuerySystemSize routine returns an estimate of the amount of memory in the system.

Syntax

MM_SYSTEMSIZE MmQuerySystemSize();

Return value

MmQuerySystemSize returns one of MmSmallSystem, MmMediumSystem, or MmLargeSystem.

Remarks

This routine can be called during driver initialization to determine how much memory it is practical to allocate for an internal buffer.

Requirements

Requirement Value
Minimum supported client Available starting with Windows 2000.
Target Platform Universal
Header wdm.h (include Wdm.h, Ntddk.h, Ntifs.h)
Library NtosKrnl.lib
DLL NtosKrnl.exe
IRQL Any level

See also

MmIsThisAnNtAsSystem