IV85098: I/O HANG OR CRASH IN EFC_FREE_LOGIN _TBLE WITH SOME FC ADAPTERS APPLIES TO AIX 7100-04

APAR status

• Closed as program error.

Error description

• **************************************************************
  * USERS AFFECTED:
    * Systems running the AIX 7100-04 Technology Level
    * with devices.pci.df1000f7.com below the 7.1.4.30 level.
    **************************************************************
    * PROBLEM DESCRIPTION:
    * I/O can hang during SAN events which cause a change in WWPN
    * for well-known switch N_Port IDs (for example the switch
    * nameserver).  Events which may cause this to occur include
    * regular SAN maintenance such as moving cables, rebooting
    * switches, bouncing switch ports, etc.. It could also happen
    * if links are dropped briefly, forcing the host-side
    adapters
    * to re-login to the fabric.
    *
    * In some recent Service Packs, this may manifest as a system
    * crash, asserting in efc_free_login_tble().
    *
    * The error log will contain a number of FCA_ERR12 errors,
    * with the error number 0x9E in the first line of the SENSE
    * DATA, eg:
    * 0000 0011 0000 009E ... ...
    *
    * This only affects VIO Servers and LPARs with physical Fibre
    * Channel adapters, and affects all IBM FC adapters except
    * for those with Feature Codes 25xx, 2Exx, and ENxx
    *
    * Check for the Feature Code (Card ID Number)
    * On VIOS with:
    *  $ lsdev -dev fcsX -vpd | grep "Customer Card ID Number"
    * And on AIX with:
    *  # lscfg -l fcsX -v   | grep "Customer Card ID Number"
    **************************************************************
    * RECOMMENDATION:
    * Install APAR IV85098.
    * Prior to fix availability, an interim fix is available from
    * either
    * ftp://aix.software.ibm.com/aix/ifixes/iv85098/
    * https://aix.software.ibm.com/aix/ifixes/iv85098/
    * Installation of the ifix requires a reboot.
    **************************************************************
  

Local fix

• The only way to recover from the hang is to reboot the
  host.
  
  If the problem occurs in a VIO configuration, the VIO
  server will need to be rebooted. Any NPIV client LPARs
  mapped to the impacted physical adapter/path will also
  need to be rebooted.
  

Problem summary

•   **************************************************************
    * USERS AFFECTED:
    * Systems running the AIX 7100-04 Technology Level
    * with devices.pci.df1000f7.com below the 7.1.4.30 level.
    **************************************************************
    * PROBLEM DESCRIPTION:
    * I/O can hang during SAN events which cause a change in WWPN
    * for well-known switch N_Port IDs (for example the switch
    * nameserver).  Events which may cause this to occur include
    * regular SAN maintenance such as moving cables, rebooting
    * switches, bouncing switch ports, etc.. It could also happen
    * if links are dropped briefly, forcing the host-side
    adapters
    * to re-login to the fabric.
    *
    * In some recent Service Packs, this may manifest as a system
    * crash, asserting in efc_free_login_tble().
    *
    * The error log will contain a number of FCA_ERR12 errors,
    * with the error number 0x9E in the first line of the SENSE
    * DATA, eg:
    * 0000 0011 0000 009E ... ...
    *
    * This only affects VIO Servers and LPARs with physical Fibre
    * Channel adapters, and affects all IBM FC adapters except
    * for those with Feature Codes 25xx, 2Exx, and ENxx
    *
    * Check for the Feature Code (Card ID Number)
    * On VIOS with:
    *  $ lsdev -dev fcsX -vpd | grep "Customer Card ID Number"
    * And on AIX with:
    *  # lscfg -l fcsX -v   | grep "Customer Card ID Number"
    **************************************************************
    * RECOMMENDATION:
    * Install APAR IV85098.
    * Prior to fix availability, an interim fix is available from
    * either
    * ftp://aix.software.ibm.com/aix/ifixes/iv85098/
    * https://aix.software.ibm.com/aix/ifixes/iv85098/
    * Installation of the ifix requires a reboot.
    **************************************************************
  

Problem conclusion

• Code added to avoid the loop by managing our data structure
  properly.
  

Temporary fix

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

Comments

• 6100-09 - use AIX APAR IV83143
  7100-04 - use AIX APAR IV85098
  7200-01 - use AIX APAR IV85057
  

APAR Information

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

  IV83143

• 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 U859909

     UP16/10/25 I 1000 Ž