OA53273: RSM FIXES FOR HBB77B0

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• RSM FIXES FOR HBB77B0
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Users of HBB77B0                                             *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * Various Problems:                                            *
  * Possible ABEND071RSN30 during move frame processing due to   *
  * bad PFTE queuing.                                            *
  * Bad count of backed pageable link pack area (PLPA) pages in  *
  * RCE.                                                         *
  * Possible ABENDC0D RSN13000401 in frame move processing after *
  * backout of CONFIG STOR,OFF.                                  *
  * MSGIEA303W while attempting to initialize the PCIE area as   *
  * quad frames.                                                 *
  * Possible data loss when attempting to steal (via local i.e.  *
  * UIC steal) 1M frame that is unchanged in real.               *
  * Possible ABEND071 during local steal processing.             *
  * Possible ABEND058 during local steal processing.             *
  * RSMDATA EXCEPTION results in incorrect MSGIAR81003I REASON   *
  * CODE 0C00B001.                                               *
  * Possible ABEND178 RSN1C in MASTER when an LSQA GETMAIN       *
  * request cannot be satisfied.                                 *
  * Residual data not being flushed from translation lookaside   *
  * buffers (TLBs).                                              *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  The following problems are addressed:
  1) Possible ABEND071RSN30 during move frame processing due to
  bad PFTE queuing
  2) RSM will page out the PLPA to SCM if SCM exists. The RCELPARE
  count was not adjusted to reflect this.
  3) Possible ABENDC0D RSN13000401 in frame move processing after
  backout of CONFIG STOR,OFF due to double free of frame.
  4) MSGIEA303W while attempting to initialize the PCIE area as
  quad frames on systems with a single address increment.
  5) Possible data loss when attempting to steal (via local i.e.
  UIC steal) 1M frame that is unchanged in real. If frame becomes
  changed during steal processing, data may be lost and the
  application may subsequently see a page of zeros.
  6) Possible ABEND071 during local steal processing due to a lack
  of disablement time checking while processing frames for a
  particular queue.
  7) Possible ABEND058 during local steal processing when
  attempting to demote 1M pages.
  8) RSMDATA EXCEPTION DATASPACES ALL results in incorrect
  IAR81003I REASON CODE 0C00B001 messages.  The reported PFTEs
  were (1) available and a free queue id of '05'x or (2) not
  available and had an ASID of 'FFFC'x.
  9) Possible ABEND178 RSN1C in MASTER when an LSQA GETMAIN
  request cannot be satisfied because the page table that maps the
  VSA that VSM has selected is paged out.
  10) RSM incorrectly uses CRDTE instruction as a means of
  demoting data space 1M frames, resulting in residual data not
  being flushed from translation lookaside buffers (TLBs).
  

Problem conclusion

• 1) Update move frame recovery processing to scan queues for PFTE
  and to correctly handle not finding the PFTE.
  2) The RCELPARE count will be adjusted if the PLPA is paged out
  to SCM.
  3) Reconfiguration processing is changed to only re-initialize
  frames that were already taken offline.
  4) RSM changed to handle systems with a single address increment
  and PCIE 1M frames.
  5) Local steal processing is changed to invalidate the 1M page
  prior to determining whether the backing frame is changed.
  6) Local steal processing is changed to check disablement time
  before processing each frame and abort if necessary.
  7) Local steal processing will no longer issue a CMSET when
  attempting to demote common 1M frames.
  8) RSMDATA EXCEPTION processing is changed to not issue
  exception messages for these types of PFTEs.
  9) RSM changed to make page tables in the MASTER address space
  ineligible for paging.
  10) RSM is changed to use CSP instead of CRDTE.
  
  Additional enhancements:
  Health checks IBMRSM,RSM_INCLUDE1MAFC and
  IBMRSM,RSM_MINIMUM_REAL now enabled.
  Enhance RSM processing during IPL to reduce the number of frames
  z/OS touches under zVM until the frames are used.
  Enhance local steal processing to take into account the reset
  reference bit extended (RRBE) instruction condition code to
  improve efficiency.
  Enhance local steal to steal DREF frames aged by IARV64
  DISCARDDATA KEEPREAL=YES that are unchanged.
  Enhance local steal processing to not check the changed or
  referenced status of the frame it is stealing when the caller is
  DUMPSRV. Aged frames will be paged to auxiliary storage without
  checking referenced or changed status.
  Enhance local steal demotion processing is changed to avoid
  invoking CMSET if the target space is logically swapped.
  Rollup of OA52025 to HBB77B0 - ABENDDC2 RC55006C20 ATTEMPTING TO
  PCIE UNFIX PAGES THAT WERE PROPERLY PCIE FIXED
  

Temporary fix

Comments

• ×**** PE17/08/17 FIX IN ERROR. SEE APAR OA53715  FOR DESCRIPTION
  

APAR Information

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

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

  UA92872 UA92873

Modules/Macros

• IAXMO    IARHCMSG IAXQX    IARHCADC IEEVSGP1 IAXM8    IEEVSTEL
  IARRSHEN IEAIPL00 IEAIPL01 IAXUN    IAXUM    IEEVSTF1 IARHCCHK
  IAXSV    IAXZINIT IAXZXCEP IAXMT    IARCP64  IAXCV    IAXVH
  IAXXI    IAXCY    IARV64   IAXXS    IAXXR    IAXZXGCB IAXZVFSB
  IAXZXRQ  IAXZVRIT IAXZVUTB IAXMH    IAXYT    IAXZVLVS IAXMI
  IARVSERV IAXU6    IAXFS    IAXUP    IARRSHJP
  

Fix information

• Fixed component name

  RSM - REAL STOR

• Fixed component ID

  5752SC1CR

Applicable component levels

• R7B0 PSY UA92872

     UP17/08/09 P F708

• R7BJ PSY UA92873

     UP17/08/09 P F708

Fix is available

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