A fix is available
APAR status
Closed as program error.
Error description
When the AIX diskless clients using NFSv4 mounted filesystems for /var are being rebooted using: shutdown -Fr command, the clients could hang. A dump from the time of the problem will show the reboot thread stuck in: (0)> th -n reboot SLOT NAME STATE TID PRI RQ CPUID CL WCHAN pvthread+198E00 6542 reboot SLEEP 18E0393 040 58 0 vmmary_scb+480EB1B8 (0)> f 6542 pvthread+198E00 STACK: [0007185C]begfst+0001DC () [00071858]begfst+0001D8 () [006F8D7C]vms_iowaitf+00007C (??, ??) [05D968B0]flush_vp+0004F0 (??, ??) [05D972F8]sync_vp+000138 (??) [05D93230]nfs_fsync_range+000110 (??, ??, ??, ??, ??, ??) [05D61A6C]nfs4_fsync_range+00008C (??, ??, ??, ??, ??, ??) [005E46FC]vnop_fsync_range+00009C (??, ??, ??, ??, ??, ??) [005E46FC]vnop_fsync_range+00009C (??, ??, ??, ??, ??, ??) [005A9948]fsync_common+0000E8 (??, ??, ??, ??, ??) [000038A4]mfspurr_sc_flih01+0000E4 () [100006EC]markdown+00016C () [10000E50]main+0006F0 (??, ??) [032B4C3C]skey_kmode+000000 () [kdb_get_virtual_memory] no real storage @ 2FF22B1042228234 [kdb_read_mem] no real storage @ FFFFFFFFFFF8F90 The IO is to write to wtmp file but it cannot complete since nfsrgyd daemon was already stopped earlier in the shutdown process. This daemon is necessary for NFSv4.
Local fix
Problem summary
AIX diskless clnts using NFSv4 for /var hang during shutdown. The reboot thread would be stuck in markdown: (0)> f 6542 pvthread+198E00 STACK: 0007185C begfst+0001DC () 00071858 begfst+0001D8 () 006F8D7C vms_iowaitf+00007C (??, ??) 05D968B0 flush_vp+0004F0 (??, ??) 05D972F8 sync_vp+000138 (??) 05D93230 nfs_fsync_range+000110 (??, ??, ??, ??, ??, ??) 05D61A6C nfs4_fsync_range+00008C (??, ??, ??, ??, ??, ??) 005E46FC vnop_fsync_range+00009C (??, ??, ??, ??, ??, ??) 005E46FC vnop_fsync_range+00009C (??, ??, ??, ??, ??, ??) 005A9948 fsync_common+0000E8 (??, ??, ??, ??, ??) 000038A4 mfspurr_sc_flih01+0000E4 () 100006EC markdown+00016C () 10000E50 main+0006F0 (??, ??) 032B4C3C skey_kmode+000000 () kdb_get_virtual_memory no real storage @ 2FF22B1042228234 kdb_read_mem no real storage @ FFFFFFFFFFF8F90
Problem conclusion
Ensure some NFS deamons are not killed by shutdown.
Temporary fix
Comments
6100-08 - use AIX APAR IV58653 6100-09 - use AIX APAR IV58487 6100-09 - use AIX APAR IV58487 6100-09 - use AIX APAR IV58487 7100-02 - use AIX APAR IV56689 7100-03 - use AIX APAR IV58455 7100-04 - use AIX APAR IV58542
APAR Information
APAR number
IV58487
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2014-04-01
Closed date
2014-04-01
Last modified date
2016-05-10
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Fixed component name
AIX 610 STD EDI
Fixed component ID
5765G6200
Applicable component levels
R610 PSY U859289
UP14/05/21 I 1000
PTF to Fileset Mapping
U859289 bos.rte.control 6.1.9.15
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Document Information
Modified date:
10 May 2016