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IV70778: AME WITH LOCK INSTRUMENTATION ENABLED MAY CRASH LPAR APPLIES TO AIX 7100-03

A fix is available

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You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • When AME is enabled on a system, in some rare scenario
    LPAR may crash with
    the following stack
    
    NOTE: Lock instrumentation should be enabled too.
    
    [00009518].simple_lock+000018 ()
    [001291D4]v_cbp_migrate_blk+000074 (??, ??, ??, ??, ??)
    [00069788]begfst+000128 ()
    ____ Exception (F00000003019F600) ____
    iar   : 00000000000E5934  msr   : 8000000000009032  cr
    : 82024404
    lr    : 000000000011B068  ctr   : 000000000172DBB0  xer
    : 00000000
    mq    : 00000000  asr   : 00000003484D4001  amr   :
    FFFCFC3FFFFFFFFF
    r0  : 0000000088024488  r1  : 0FFFFFFFF417FCE0  r2  :
    0000000002C05EF0
    r3  : 0000000000067154  r4  : 8000000000009032  r5  :
    00000000000000B0
    r6  : F1000815B0170900  r7  : 0000000000000000  r8  :
    F1000F1D48046E40
    r9  : 0000000000000001  r10 : 0000000000000000  r11 :
    000000000270E628
    r12 : FFFCFF3FFFFFFFFC  r13 : F1000101509B5800  r14 :
    00000000DEADBEEF
    r15 : 0000000000018030  r16 : 0000000001000085  r17 :
    00000000510000F0
    r18 : 0000000000000003  r19 : 00000000FFFEFBFF  r20 :
    0000000000000001
    r21 : 0000000000000000  r22 : F1000101509B59C0  r23 :
    F00000002FF47600
    r24 : 0000000000000000  r25 : F1000F0A00002C00  r26 :
    F1000F0A10003100
    r27 : F1000107E0732400  r28 : F1000101509B5800  r29 :
    0000000000000000
    r30 : 0000000000000001  r31 : 0000000000000001
    
    
    - vmlog information will be
    
    (5)> vmlog
    Most recent VMM errorlog entry
    Error id               =  DSI_PROC
    Exception DSISR/ISISR  =  0000000040000000
    Exception srval        =  00007FFFFFFFD080
    Exception virt addr    =  F1000F1D4C2EB040
    Exception value        =  00000115
    EXCEPT_DISABLED_PFAULT
    
    (5)>
    

Local fix

  • disabling AME or lock instrumentation will avoid this
    issue
    

Problem summary

  • System crash with this stack
     00009518 .simple_lock+000018 ()
     001291D4 v_cbp_migrate_blk+000074 ()
    

Problem conclusion

  • Allocate a pinned lock instead of a pageable one.
    

Temporary fix

Comments

  • 6100-08 - use AIX APAR IV66322
    6100-09 - use AIX APAR IV70702
    7100-02 - use AIX APAR IV70810
    7100-03 - use AIX APAR IV70778
    

APAR Information

  • APAR number

    IV70778

  • Reported component name

    AIX V7.1

  • Reported component ID

    5765H4000

  • Reported release

    710

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Submitted date

    2015-03-10

  • Closed date

    2015-03-10

  • Last modified date

    2015-09-30

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

    IV66322

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

Fix information

  • Fixed component name

    AIX V7.1

  • Fixed component ID

    5765H4000

Applicable component levels

  • R710 PSY U865837

       UP15/05/19 I 1000

PTF to Fileset Mapping



Document information

More support for: AIX Enterprise Edition

Software version: 710

Operating system(s): AIX

Reference #: IV70778

Modified date: 30 September 2015