APAR status
Closed as fixed if next.
Error description
The OS crash was occurred after CPU usage abnormal increasing about 100%. CRASH INFORMATION: CPU 36 CSA F1000815B0B2ED00 at time of crash, error code for LEDs: 70000000 pvthread+09E900 STACK: [00023980]abend_trap+000000 () [005BDEE4]slock+000604 (??, ??) [000090C4].disable_lock+0000C0 () [069C64BC]fastlo_setup+0000FC (??, ??) [06A004EC]tcp_input0+005B2C (??, ??, ??, ??) [069CDC58]ip6_input+000838 (F1000E02AFED5200, 0000000000000000) [0694DC24]ipintr_noqueue_post_fw+0019A4 (0000000005370DC8, F1000E02AFED5200, F1000815B0B2E9A0) [0694E01C]ipintr_noqueue+0001DC (??, ??, ??) [0694E200]ipintr+000100 () [001B81CC]i_offlevel+00012C (??, ??) [001B7CAC]i_softmod+0005CC () [000EB2CC]flih_util+000258 () ____ Exception (F00000002FF47600) ____ iar : 00000000000093C0 msr : 8000000000001032 cr : 42222224 lr : 0000000000000000 ctr : 000000000047C400 xer : 00000090 mq : FFFFFFFF asr : 000000371C71D001 amr : FFFF3C3FFFFFFFFF r0 : 0000000042222224 r1 : F00000002FF46DE0 r2 : 0000000003255140 r3 : 00000000000093C0 r4 : 8000000000001032 r5 : 0000000042222224 r6 : F00000002FF46DE0 r7 : 0000000002331000 r8 : 000000000000080A r9 : 0000000000000000 r10 : F00000002FF47600 r11 : 0000000003368000 r12 : 0000000000000001 r13 : F1000A0381E07800 r14 : F1000E0106B6E400 r15 : 0000000000000090 r16 : 0000000000000090 r17 : 00000000032578C8 r18 : 0000000000020000 r19 : 0000000005372210 r20 : 0000000000000000 r21 : F1000E0106B6E400 r22 : 0000000003258148 r23 : 0000000000000000 r24 : 0000000000000000 r25 : 0000000000000000 r26 : 0000000000000000 r27 : F1000E0003C23A08 r28 : 0000000000000000 r29 : 000000000000080A r30 : 0000000000000000 r31 : F1000E0170304008 prev 0000000000000000 stackfix 0000000000000000 int_ticks 0000 cfar 000000000010F79C kjmpbuf 0000000000000000 excbranch 0000000000000000 no_pfault 00 intpri 0B backt 00 flags 00 hw_fru_id 00000001 hw_cpu_id 00000009 fpscr 0000000082002000 fpscrx 00000000 fpowner 01 fpeu 01 fpinfo 00 alloc F000 tmstate 00 tmcontext 00 prevowner 01 o_iar 00000000000742DC o_toc 0000000003255140 o_arg1 0000000006CB0E4A o_vaddr 0000000000000000 krlockp 0000000000000000 rmgrwa 0000000000000000 amrstackhigh F00000002FFCCFF0 amrstacklow F00000002FFCC000 amrstackcur F00000002FFCCFF0 amrstackfix 0000000000000000 kstackhigh 0000000000000000 kstacksize 00000000 frrstart 700DFEED00000000 frrend 700DFEED00000000 frrcur 700DFEED00000000 frrstatic 0000 kjmpfrroff 0000 frrovcnt 0000 frrbarrcnt 0000 frrmask 00 callrmgr 00 Except : excp_type 00000106 EXCEPT_DSI orgea 0000000110C54144 dsisr 0000000040000000 bit set: DSISR_PFT vmh 00000077E5FF8C80 curea 0000000110C54144 pftyp 0000000000000106 [000093C0].unlock_enable_mem+0000B4 () [000093BC].unlock_enable_mem+0000B0 () [069E7768]udp_send+000388 (F1000E0170304008, F1000E02DA767800, F00000002FF47110, 0000000000000000, 0000000000000000, 0000400000004000) [00565F78]esendit+000C78 (??, ??, ??, ??) [00567224]_ensendmsg+000A24 (??, ??, ??, ??) [00003938]syscall+000230 () [kdb_get_virtual_memory] no real storage @ FFFFFFFFFFEF760 [90000000010BB0C]090000000010BB0C () [kdb_read_mem] no real storage @ FFFFFFFFFFF5A90
Local fix
The issue seems to occur only when a tcp_fastlo( tcp_fastlo = 1) was enabled as it leads to crash in fastlo_setup(). So, we recommend to disable it for preventing a next system crash.
Problem summary
ABEND IN FASTLO_SETUP DUE TO SIMPLE LOCK ACQUIRED TWICE
Problem conclusion
Temporary fix
Comments
This APAR is being closed FIN. This means that a solution to this APAR is expected to be delivered from IBM in a release (if any) to be available within the next 24 months.
APAR Information
APAR number
IJ08926
Reported component name
AIX V7.1
Reported component ID
5765H4000
Reported release
710
Status
CLOSED FIN
PE
NoPE
HIPER
NoHIPER
Submitted date
2018-09-03
Closed date
2018-10-15
Last modified date
2019-11-28
APAR is sysrouted FROM one or more of the following:
APAR is sysrouted TO one or more of the following:
Fix information
Applicable component levels
[{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SSMV87","label":"AIX 6.1 Enterprise Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSMVAX","label":"AIX Express Edition"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"LOB08","label":"Cognitive Systems"}},{"Business Unit":{"code":"BU054","label":"Systems w\/TPS"},"Product":{"code":"SG11R","label":"AIX 7.1 HIPERS, APARs and Fixes"},"Component":"","ARM Category":[],"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"710","Edition":"","Line of Business":{"code":"","label":""}}]
Document Information
Modified date:
28 November 2019