A fix is available
APAR status
Closed as program error.
Error description
nfs v4 machine crashed during live dump. the stack trace looks like (5)> f pvthread+06A100 STACK: ￭047BE224nfs4_rasld_rnodes+0002E4 (F100010201C52480, 5200000000000603, F100010202D65000, 41820230E81F0438 ￭??) ￭047BDBC0nfs4_rasld_fsid+000320 (??, ??, ??, ??) ￭047BF0C0nfs4_ras_client_fsid_cb+000140 (??, ??, ??, ??) ￭000822BCldmp_issue_call@AF92_3+00005C (??, ??, ??) ￭0007F658ldmp_ser_dump+001058 (??) ￭00081FA0livedump+000A80 (??) ￭003DF514ldmp_take+000834 (??, ??) ￭003E02C4ldmp_ioctl+000064 (??, ??) ￭0054D0C0rdevioctl+0000C0 (??, ??, ??, ??, ??, ??) ￭0071A7C0spec_ioctl+000080 (??, ??, ??, ??, ??, ??) ￭0057D410vnop_ioctl+000050 (??, ??, ??, ??, ??, ??) ￭0059237Cvno_ioctl+00009C (??, ??, ??, ??, ??) ￭00658878common_ioctl+0000F8 (??, ??, ??, ??) ￭00003850ovlya_addr_sc_flih_main+000130 () ￭kdb_get_virtual_memory no real storage @ FFFFFFFFFFFE240 the fsid has been force unmounted, it is trying to access root vnode which has been freed.
Local fix
Problem summary
nfs v4 machine crashed during live dump. the stack trace looks like (5)> f pvthread+06A100 STACK: 047BE224 nfs4_rasld_rnodes+0002E4 (F100010201C52480, 5200000000000603, F100010202D65000, 41820230E81F0438 ?? ) 047BDBC0 nfs4_rasld_fsid+000320 (??, ??, ??, ??) 047BF0C0 nfs4_ras_client_fsid_cb+000140 (??, ??, ??, ??) 000822BC ldmp_issue_call@AF92_3+00005C (??, ??, ??) 0007F658 ldmp_ser_dump+001058 (??) 00081FA0 livedump+000A80 (??) 003DF514 ldmp_take+000834 (??, ??) 003E02C4 ldmp_ioctl+000064 (??, ??) 0054D0C0 rdevioctl+0000C0 (??, ??, ??, ??, ??, ??) 0071A7C0 spec_ioctl+000080 (??, ??, ??, ??, ??, ??) 0057D410 vnop_ioctl+000050 (??, ??, ??, ??, ??, ??) 0059237C vno_ioctl+00009C (??, ??, ??, ??, ??) 00658878 common_ioctl+0000F8 (??, ??, ??, ??) 00003850 ovlya_addr_sc_flih_main+000130 () kdb_get_virtual_memory no real storage @ FFFFFFFFFFFE240 the fsid has been force unmounted, it is trying to access root vnode which has been freed.
Problem conclusion
go through fsid's private vfs to get to the real vfs instead of going through mntinfo's root vnode. because root vnode may be freed within an force unmounted file system.
Temporary fix
Comments
6100-04 - use AIX APAR IZ87721 6100-05 - use AIX APAR IZ87671 6100-06 - use AIX APAR IZ85170 7100-00 - use AIX APAR IZ85596
APAR Information
APAR number
IZ85170
Reported component name
AIX 610 STD EDI
Reported component ID
5765G6200
Reported release
610
Status
CLOSED PER
PE
NoPE
HIPER
NoHIPER
Submitted date
2010-09-16
Closed date
2010-09-16
Last modified date
2013-04-17
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 U835918
UP11/05/10 I 1000
PTF to Fileset Mapping
U835918 bos.net.nfs.client 6.1.6.15
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Document Information
Modified date:
17 April 2013