OA45411: HIGH CPU MASTER IAXUR LOOPING PROCESSING INTERCEPTED FRAME IN THE 1G RANGE IMMEDIATELY BELOW ANY 64G INCREMENT CONFIG OFFLINE

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Config stor,offline command was issued for a range of storage
  that included storage in the 1G increment below 64G.  This
  increment contained frames that were fixed long term by a
  non-swappable address space.  IAXUR, the free frame SRB, was
  scheduled to intercept this frame.  After APAR OA44199, this
  processing scans only the storage areas containing intercepted
  frames.  Since the address space was non-swappable the free
  frame was not successful.  This area of storage was marked for
  reprocessing later; however, the code immediately reprocesses
  the same range continuously.
  PE Information:
  User's Affected: Users with OA44199 installed.
  UA73558(HBB7790) UA73559 (JBB778H)
  User Impact:
  Users of CONFIG STOR,OFFLINE command with greater than 63G
  real storage.
  APAR OA44199 fixed the problem it reported but introduced a new
  problem described above.
  

Local fix

• With systems that have more than 1 CPU:
  Cancel the config offline process
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: Users of JBB778H and HBB7790 with            *
  *                 greater than 63G of real storage.            *
  ****************************************************************
  * PROBLEM DESCRIPTION: High CPU in Master address space        *
  *                      running in module IAXUR processing      *
  *                      config storage offline command.         *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  Config stor,offline command was issued for a range of storage
  that included storage in the 1G increment below 64G.  This
  increment contained frames that were fixed long term by a
  non-swappable address space.  IAXUR, the free frame SRB, was
  scheduled to intercept this frame.  After APAR OA44199, this
  processing scans only the storage areas containing intercepted
  frames.  Since the address space was non-swappable the free
  frame was not successful.  This area of storage was marked for
  reprocessing later; however, the code immediately reprocessed
  the same range continuously.
  
  This problem can occur whenever a frame located in a 1G
  increment just below any 64G multiple is marked intercepted
  and cannot be processed on the first pass in IAXUR.
  

Problem conclusion

• Module IAXUR is changed to process the next frame when the
  previous frame is marked for reprocessing.
  

Temporary fix

• *********
  * HIPER *
  *********
  

Comments

APAR Information

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

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

  UA74041 UA74042

Modules/Macros

• IAXUR
  

Fix information

• Fixed component name

  RSM - REAL STOR

• Fixed component ID

  5752SC1CR

Applicable component levels

• R78H PSY UA74042

     UP14/07/16 P F407 «

• R790 PSY UA74041

     UP14/07/16 P F407 «

Fix is available

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