IJ24885: USING NPIV WITH VIOS 3.1.1 CAN CAUSE A CRASH APPLIES TO AIX 7200-04

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• **************************************************************
  * USERS AFFECTED:
  * Systems running VIOS 3.1.1.x with
  * devices.vdevice.IBM.vfc-server.rte at
  * or below 7.2.4.1.
    **************************************************************
  * ERROR DESCRIPTION:
  * This is only an issue using NPIV with VIOS 3.1.1.
  * A VIOS partition with Virtual Fibre Channel (NPIV) adapters
  * can crash during LPM migration/validation, a Simplified
  * Remote Restart (SRR), a VM Recovery Manager HA/DR Operation,
  * a client LPAR boot, SAN changes, I/O timeouts, etc.
  * In a dual VIOS environment, client LPARs should maintain
  * network and storage connectivity through the alternate VIOS
  * during this crash.
  *
  * The stack of the crash will be similar to below:
  * ÝF1000000C0209A14¨vfc_host:npiv_dequeue+000014
  * ÝF1000000C01FDFA0¨vfc_host:npiv_release_cmd_list@AF81_26
  * ÝF1000000C01EFC58¨vfc_host:cmdh_send_messages+0004B8
  * ÝF1000000C01F0850¨vfc_host:npiv_crq_reader+0001F0
  * ÝF1000000C01F28D4¨vfc_host:npiv_cmd_handler+0000B4
  * ÝF1000000C01F3AD0¨vfc_host:npiv_cmdh_thr_sched+0000D0
  * ÝF1000000C01F2CD0¨vfc_host:npiv_thr_sched_run+000070
  * Ý00014D70¨.hkey_legacy_gate+00004C ()
  *
  * IBM recommends applying the fix to prevent hitting the issue.
  * Disabling src and dest lun level validation on the VIOS
  * during
  * LPM/validation, and avoiding the operations listed above may
  * reduce the chances of hitting the crash until the fix can be
  * applied.
  * You can disable src and dest lun level validation using the
  * following padmin commands on the VIOS. These changes are
  * dynamic:
  *
  * $ chdev -dev vioslpm0 -attr src_lun_val=off
  * $ chdev -dev vioslpm0 -attr dest_lun_val=restart_off
    **************************************************************
  * RECOMMENDATION:
  * Install APAR IJ24885.
  * Prior to fix availability, an interim fix is available from
  * either
  * ftp://aix.software.ibm.com/aix/ifixes/ij24885/
  * https://aix.software.ibm.com/aix/ifixes/ij24885/
  * The ifix can be installed using Live Update (LU).
  * If LU is not used, installation of the ifix requires a
  * reboot.
    **************************************************************
  

Local fix

Problem summary

• The VIOS may crash in function npiv_dequeue.  This is most
  likely to occur during LPM or when the client NPIV driver
  performs error recovery (for example, if the fabric is in a bad
  state).
  

Problem conclusion

• Hold proper lock when accessing command queue.
  

Temporary fix

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

Comments

• 7200-04 - use AIX APAR IJ24885
  

APAR Information

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

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

  IJ24886 U887730

Fix information

• Fixed component name

  AIX V7.2

• Fixed component ID

  5765CD200

Applicable component levels

• R720 PSY U887730

     UP20/07/20 I 1000 Ž