--- Comment From heinz-werner_se...@de.ibm.com 2019-11-13 03:56 EDT---
---Problem Description---
Running LTP test results in the following warning stack trace in the
journalctl. Please let me know if any additional data is needed.
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case 5: register_blkdev()
with major=512/4294967295
Oct 29 22:47:43 t35lp04 kernel: register_blkdev: major requested (512) is
greater than the maximum (512) for ltp_block_dev
Oct 29 22:47:43 t35lp04 kernel: register_blkdev: major requested (-1) is
greater than the maximum (512) for ltp_block_dev
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case Result: PASS
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case 6: register_blkdev()
with name=""
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case Result: PASS
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case 7: unregister_blkdev()
with major=0
Oct 29 22:47:43 t35lp04 kernel: [ cut here ]
Oct 29 22:47:43 t35lp04 kernel: WARNING: CPU: 10 PID: 93645 at
/build/linux-ru4Kqk/linux-4.15.0/block/genhd.c:412 unregister_blkdev+0xb6/0x110
Oct 29 22:47:43 t35lp04 kernel: Modules linked in: ltp_block_dev(OE) vmac
chacha20_generic poly1305_generic chacha20poly1305 algif_aead authenc pcrypt
crypto_user xfrm_user xfrm_algo sha3_generic algif_hash salsa20_generic
algif_skcipher af_alg msdos dummy veth binfmt_misc sctp brd nls_utf8
nls_iso8859_1 ntfs btrfs xor zstd_compress zlib_deflate raid6_pq xfs libcrc32c
overlay dm_multipath scsi_dh_rdac scsi_dh_emc scsi_dh_alua s390_trng ghash_s390
prng aes_s390 des_s390 des_generic qeth_l2 sha512_s390 sha256_s390 sha1_s390
sha_common chsc_sch eadm_sch qeth ccwgroup vfio_ccw vfio_mdev mdev
vfio_iommu_type1 vfio sch_fq_codel ip_tables x_tables crc32_vx_s390 zfcp qdio
scsi_transport_fc dasd_eckd_mod dasd_mod [last unloaded: ltp_fw_load]
Oct 29 22:47:43 t35lp04 kernel: CPU: 10 PID: 93645 Comm: block_dev Tainted: G
OE4.15.0-66-generic #75-Ubuntu
Oct 29 22:47:43 t35lp04 kernel: Hardware name: IBM 8561 T01 403 (LPAR)
Oct 29 22:47:43 t35lp04 kernel: Krnl PSW : dbddaa8b a41f3293
(unregister_blkdev+0xb6/0x110)
Oct 29 22:47:43 t35lp04 kernel:R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0
AS:3 CC:0 PM:0 RI:0 EA:3
Oct 29 22:47:43 t35lp04 kernel: Krnl GPRS: 0800 0006
0024 0007
Oct 29 22:47:43 t35lp04 kernel:005c6672 7fe03000
0001 02aa3f9de4c0
Oct 29 22:47:43 t35lp04 kernel:0004569dbf00 0001
03ff800be11c
Oct 29 22:47:43 t35lp04 kernel: 0094ebb0
005c6672 0004569dbd10
Oct 29 22:47:43 t35lp04 kernel: Krnl Code: 005c: c02000260c97
larl%r2,a87f94
005c666c: c0e5ffe0f502 brasl %r14,1e5070
#005c6672: a7f40001 brc 15,5c6674
>005c6676: a7c9 lghi%r12,0
005c667a: a7f4001c brc 15,5c66b2
005c667e: ec2c1dbc0359 risbgn %r2,%r12,29,188,3
005c6684: b90400c1 lgr %r12,%r1
005c6688: c010004cd4b8 larl%r1,f60ff8
Oct 29 22:47:43 t35lp04 kernel: Call Trace:
Oct 29 22:47:43 t35lp04 kernel: ([<005c6672>]
unregister_blkdev+0xb2/0x110)
Oct 29 22:47:43 t35lp04 kernel: [<03ff800bd798>] sys_tcase+0x560/0x9a0
[ltp_block_dev]
Oct 29 22:47:43 t35lp04 kernel: [<0042c7fc>]
kernfs_fop_write+0xdc/0x218
Oct 29 22:47:43 t35lp04 kernel: [<0038a1fc>] vfs_write+0x184/0x1e8
Oct 29 22:47:43 t35lp04 kernel: [<0038a444>] SyS_write+0x6c/0xf0
Oct 29 22:47:43 t35lp04 kernel: [<008f7454>] system_call+0xd8/0x2c8
Oct 29 22:47:43 t35lp04 kernel: Last Breaking-Event-Address:
Oct 29 22:47:43 t35lp04 kernel: [<005c6672>]
unregister_blkdev+0xb2/0x110
Oct 29 22:47:43 t35lp04 kernel: ---[ end trace e89fa54649b0cc78 ]---
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: Test Case Result: PASS
Oct 29 22:47:43 t35lp04 kernel: ltp_block_dev: device released
Oct 29 22:47:43 t35lp04 LTP: starting tpci
Oct 29 22:47:43 t35lp04 LTP: starting tbio
---uname output---
Linux t35lp04 4.15.0-66-generic #75-Ubuntu SMP Tue Oct 1 05:22:41 UTC 2019
s390x s390x s390x GNU/Linux
Machine Type = T35 LPAR T35LP04
---Debugger---
A debugger is not configured
---Steps to Reproduce---
Ran CI Regression Test case for LTP which:
- installs ubuntu18.04.3
- installs, builds, configures the LTP test case downloaded from github
- runs the test: echo y | /opt/ltp/runltp -S /root/ltp-skip.txt
where ltp-skip.txt contains:
root@t35lp04:~# cat ltp-skip.txt
fork13
max_map_count
min_free_kbytes
perf_event_open02
oom01
oom02
oom03
oom04
oom05
root@t35lp04:~#
Stack trace output:
Oct 29 22:47:43 t35lp04 kernel: [ cut here ]
Oct 29 22:47:43 t35lp04 kernel: WARNING: CPU: 10 PID: 93645 at
/build/linux-ru4Kqk/linux-4.15.0/block/genhd.c:4
