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Enable pool tagging

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The Enable pool tagging flag collects data and calculates statistics about pool memory allocations sorted by pool tag value.

Abbreviation

ptg

Hexadecimal value

0x400

Symbolic Name

FLG_POOL_ENABLE_TAGGING

Destination

System-wide registry entry

Comments

This flag is permanently set in Windows Server 2003 and later versions of Windows. On these systems, the Enable pool tagging check box in the Global Flags dialog box is dimmed and commands to enable or disable pool tagging fail.

Use ExAllocatePoolWithTag or ExAllocatePoolWithQuotaTag to set the tag value. When no tag value is specified (ExAllocatePool, ExAllocatePoolWithQuota), Windows creates a tag with the default value of "None." Because data for all allocations with a "None" tag is combined, you cannot distinguish the data for a specific allocation. For information about these routines, see the Windows Driver Kit (WDK).

Important

The ExAllocatePool DDIs discussed in this topic have been deprecated in Windows 10, version 2004 and have been replaced by ExAllocatePool2 and ExAllocatePool3. For more information, see Updating deprecated ExAllocatePool calls to ExAllocatePool2 and ExAllocatePool3.

Note   To display the data that Windows collects about a tagged allocation, use PoolMon, a tool that is included in the Windows Driver Kit.