A fix is available
APAR status
Closed as new function.
Error description
FICON CHPID recovery makes automatic updates to affected paths at VM level, but those events aren't always reflected to guests. Some FICON CHPID recovery processes make auto-updates (eg. VARY ON/OFF) to the affected paths at the z/VM level, but VM doesn't reflect the associated events to potentially affected guests. This can cause additional manual intervention (eg. VARY ON/OFF) at the guest level to fully recover the paths in these situations. The purpose of this APAR is to address some of these processes.
Local fix
Use manual VARY ON/OFF PATH and DEVICE commands.
Problem summary
**************************************************************** * USERS AFFECTED: All users of z/VM * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** During some channel path (CHPID) recovery actions, z/VM takes automatic recovery actions to bring the CHPIDs back into use. However, these events are not surfaced to the guest which can result in manual intervention at the guest level being needed for those paths to be used by the guests again.
Problem conclusion
Temporary fix
FOR RELEASE VM/ESA CP/ESA R640 : PREREQ: VM66166 CO-REQ: NONE IF-REQ: NONE FOR RELEASE VM/ESACP/ESAR710 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE
Comments
CHPID recovery routines for certain events were updated to present an indication to the guest so they would also be able to take needed recovery actions for the specified CHPID. In particular, when a machine check is received by z/VM indicating an I/O Resource Accessibility event has occurred, a similar machine check and associated data is surfaced to guests which are not exploiting CHPID virtualization (CHPIDV OFF).
APAR Information
APAR number
VM66309
Reported component name
VM CP
Reported component ID
568411202
Reported release
640
Status
CLOSED UR1
PE
NoPE
HIPER
NoHIPER
Special Attention
YesSpecatt / New Function / Xsystem
Submitted date
2019-07-26
Closed date
2020-06-11
Last modified date
2021-06-29
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35671 UM35672
Modules/Macros
HCPCCS HCPCIO HCPIPQBK HCPVMN
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
Fix is available
Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.
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Document Information
Modified date:
30 June 2021