A fix is available
APAR status
Closed as program error.
Error description
While running z/VM 7.1.0 on a z13 (2964) with DS8K DASD IBM was attempting to replace an HBA card on the DASD when all z/VM LPARs received an EMIFed CHPID error. z/VM LPARs running 7.1.0 RSU 1902 recovered without issue. However, the only LPAR running RSU 2001 (recently upgraded) took two ABENDMCW002 abends.
Local fix
Problem summary
**************************************************************** * USERS AFFECTED: All z/VM users * **************************************************************** * PROBLEM DESCRIPTION: * **************************************************************** * RECOMMENDATION: APPLY PTF * **************************************************************** An attempt was made to replace an HBA card on a DS8000 DASD and an EMIFed CHPID error occurred. Recovery of this CHPID error caused an ABENDMCW002. A tight loop in this recovery where the VARY LOCK is obtained and released without any VARY DEVICE or VARY PATH actions occurring causes the ABENDMCW002 because the master processor is held busy with no loss of control for too long of a time.
Problem conclusion
ABENDMCW002 - CHPID recovery processing was modified to only obtain the VARY LOCK when it is known for sure that VARY device or VARY path processing will be called. VARY device and VARY path processing allows for loss of control so that the master processor will not be held busy for too long of a time. This will prevent the ABENDMCW002 from occurring.
Temporary fix
FOR RELEASE VM/ESA CP/ESA R640 : PREREQ: VM66309 CO-REQ: NONE IF-REQ: NONE FOR RELEASE VM/ESACP/ESAR710 : PREREQ: VM66309 CO-REQ: NONE IF-REQ: NONE FOR RELEASE VM/ESA CP/ESA R720 : PREREQ: NONE CO-REQ: NONE IF-REQ: NONE
Comments
APAR Information
APAR number
VM66403
Reported component name
VM CP
Reported component ID
568411202
Reported release
710
Status
CLOSED PER
PE
NoPE
HIPER
YesHIPER
Special Attention
NoSpecatt / Xsystem
Submitted date
2020-06-18
Closed date
2020-10-08
Last modified date
2021-08-18
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
UM35751 UM35752 UM35753
Modules/Macros
HCPCIO
Fix information
Fixed component name
VM CP
Fixed component ID
568411202
Applicable component levels
R640 PSY UM35751
UP20/10/15 I 1000 ¢
R710 PSY UM35752
UP20/10/15 P 2101 ¢
R720 PSY UM35796
UP20/12/08 P 2101 ¢
Fix is available
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Document Information
Modified date:
19 August 2021