z/VM: CP Commands and Utilities Reference - z/VM - IBM

QUERY CONFIGMODE
►►
Query
Authorization
Purpose
Usage Notes
Responses
CONFIGmode
Privilege Class: B, E
Use QUERY CONFIGMODE to display whether the processor is currently executing
commands to dynamically change its I/O configuration.
Note: QUERY CONFIGMODE is a dynamic I/O command. Dynamic I/O
configuration is only supported on System/390 and zSeries processors. If
your system is not running on one of these processors, your command will
not complete successfully.
1. To turn configuration mode on or off, use the SET CONFIGMODE command
(page 1209).
2. Whenever you issue one of the following dynamic I/O commands:
DEFINE CHPID DEFINE PATH
DELETE CHPID DELETE PATH
MODIFY CHPID MODIFY PATH
DEFINE CU DEFINE CNTLUNIT
DELETE CU DELETE CNTLUNIT
MODIFY CU MODIFY CNTLUNIT
DEFINE DEVICE DEFINE IODEVICE
DELETE DEVICE DELETE IODEVICE
MODIFY DEVICE MODIFY IODEVICE
CP puts you in configuration mode, processes the dynamic I/O command, and
then takes you out of configuration mode.
3. Whenever you dynamically change your I/O configuration, CP must perform a
certain amount of overhead. If you want to issue several dynamic I/O
commands in succession and you are concerned about performance, issue the
SET CONFIGMODE ON command, issue your dynamic I/O commands, and
then issue the SET CONFIGMODE OFF command. This method causes CP to
perform the overhead only while processing the SET CONFIGMODE
commands, rather than before and after each individual command.
4. While you are in configuration mode, CP will not process any SET
DYNAMIC_I/O OFF commands. If you want to prevent people from making
dynamic I/O changes, you must exit configuration mode and enter the SET
DYNAMIC_I/O OFF command as an individual command. For more information
about the SET DYNAMIC_I/O command, see page 1247.
Response when Configuration Mode is Off:
QUERY CONFIGMODE
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Chapter 2. CP Commands 717