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SUBJECT:         APAR  NUMBER: PJ27273 
 
REFERENCE:  AREA:     MPIF SERVICE MANAGER 
            SEGMENT:  CBR0M0     - RELEASE:  MPIF  (Assembler) 
 
 
Pre-requisite APARs are: 
FOR SEGMENT CBR0M0     (Assembler) - REL MPIF 
 PJ27023  
To be applied in the order listed for each segment. 

ABSTRACT OF PROBLEM 
___________________ 
MPIF  may  cause an IPL dump in an L/C complex complex following 
Turbo MQ APAR PJ27023. 
 
 

COMMENTS ON PROBLEM 
___________________ 
Turbo MQ APAR PJ27023 increased the size of an SWB entry.   This 
caused  some  modifications  in MPIF.   CT08 (CCCTIN) carves out 
space for MPIF buffers based on Keypoint E value CK6MSBU.   This 
value  is  calculated using the size of the SWB.  Since the size 
of the SWB increased, CT08 carved out space using the  old  size 
of  an SWB.  In order to solve this problem, Turbo MQ added code 
in MPIF restart (CBR0) to calculate the new  total  buffer  size 
needed  and save the value in Keypoint E.  To use the new value, 
MPIF restart does a re-IPL so that  CT08  would  carve  out  the 
correct  amount  of space.  This IPL may cause an IPL dump.  The 
IPL takes place before CTKI is filed.  On  the  subsequent  IPL, 
IPLB  may  therefore use the wrong CPU ordinal and image numbers 
and index into the wrong section of CTKX to  retrieve  the  MCHR 
addresses of the keypoints causing the IPL dump. 
 
 

SOLUTION 
________ 
 
MPIF  restart (CBR0) has been modified to not do a soft-IPL, but 
rather put out a message indicating that a hard-IPL needs to  be 
done.  The hard-IPL does not cause the IPL dump and is only nec- 
essary once. 
 
 
DEPENDENCIES 
____________ 
 
Related Segments Affected By This APAR. 
_______________________________________ 
 
Segments to be assembled or compiled: 
None 
 
Segments to be link edited: 
None 
 
Load Modules to be loaded: 
None 
 
Migration Considerations 
======================== 
      None 
 
 
BUILD/TEST INSTRUCTIONS 
_______________________ 
 
 ===BUILD Instructions=== 
 
No special build instructions. 
 
Stubs to be built: 
 
 ===TEST Instructions=== 
 
No special test instructions. 
 
-- END APAR PJ27273 
 
 
 





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