IRP 处理例程对应的irql 环境对照表

Dispatch Routine IRQL and Thread ContextThe following table summarizes the IRQL and thread context requirements for file system filter driver dispatch routines.

Dispatch Routine	Caller's IRQL:	Caller's Thread Context:
Cleanup	PASSIVE_LEVEL	Nonarbitrary
Close	APC_LEVEL	Arbitrary
Create	PASSIVE_LEVEL	Nonarbitrary
DeviceControl (except paging I/O)	PASSIVE_LEVEL	Nonarbitrary
DeviceControl (paging I/O path)	APC_LEVEL	Arbitrary
DirectoryControl	APC_LEVEL	Arbitrary
FlushBuffers	PASSIVE_LEVEL	Nonarbitrary
FsControl (except paging I/O)	PASSIVE_LEVEL	Nonarbitrary
FsControl (paging I/O path)	APC_LEVEL	Arbitrary
LockControl	PASSIVE_LEVEL	Nonarbitrary
PnP	PASSIVE_LEVEL	Arbitrary
QueryEa	PASSIVE_LEVEL	Nonarbitrary
QueryInformation	PASSIVE_LEVEL	Nonarbitrary
QueryQuota	PASSIVE_LEVEL	Nonarbitrary
QuerySecurity	PASSIVE_LEVEL	Nonarbitrary
QueryVolumeInfo	PASSIVE_LEVEL	Nonarbitrary
Read (except paging I/O)	PASSIVE_LEVEL	Nonarbitrary
Read (paging I/O path)	APC_LEVEL	Arbitrary
SetEa	PASSIVE_LEVEL	Nonarbitrary
SetInformation	PASSIVE_LEVEL	Nonarbitrary
SetQuota	PASSIVE_LEVEL	Nonarbitrary
SetSecurity	PASSIVE_LEVEL	Nonarbitrary
SetVolumeInfo	PASSIVE_LEVEL	Nonarbitrary
Shutdown	APC_LEVEL	Arbitrary
Write (except paging I/O)	PASSIVE_LEVEL	Nonarbitrary
Write (paging I/O path)	APC_LEVEL	Arbitrary

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