VM66369: LINUX FILE SYSTEM GOES R/O AFTER AFTER PLANNED HYPERSWAP

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• A successful planned Hyperswap occurred. Seconds after, all
  Linux guest filesystems went R/O and shutdown.  This forced
  all guests to be re-cycled.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All z/VM Hyperswap Command Users             *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  ****************************************************************
  * RECOMMENDATION: APPLY PTF                                    *
  ****************************************************************
  The path mask (RDEVLPM) of a source device has no overlapping
  path mask bits of the target device it's being swapped with
  during a Hyperswap.  This can cause a guest, such as Linux to
  continue issuing I/O down a LPM that is no longer valid.  This
  will result in CC3s and recovery for the guest will continue
  to fail until retries are exhausted.  For Linux, this results
  in its file system going R/O.  This will require a re-IPL of the
  Linux guest.
  

Problem conclusion

• Code has been added to address the situation where no over-
  lapping path mask bits exist between source and target of a
  Hyperswap.  In this case, the PNOM will be set and correctly
  reflected to the guest so proper recovery can take place at
  the guest level.
  

Temporary fix

• *********
  * HIPER *
  *********
  FOR RELEASE VM/ESA CP/ESA R640 :
  PREREQ: NONE
  CO-REQ: NONE
  IF-REQ: NONE
  FOR RELEASE VM/ESACP/ESAR710 :
  PREREQ: NONE
  CO-REQ: NONE
  IF-REQ: NONE
  

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

  UM35652 UM35653

Modules/Macros

• HCPERR   HCPVIR   HCPVOT
  

Fix information

• Fixed component name

  VM CP

• Fixed component ID

  568411202

Applicable component levels

• R640 PSY UM35652

     UP20/05/20 P 2001 ¢

• R710 PSY UM35653

     UP20/05/20 P 2101 ¢

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.