Comment 23 for bug 1724120

------- Comment From <email address hidden> 2018-01-24 07:29 EDT-------
Hi,

The first problem seems to be not occurring anymore (the segmentation fault problem).

Although we are still facing the second problem (in the trace below), we created a new bug report for it.

root@tuletapio2-lp3:~/linux/tools/testing/selftests/memory-hotplug# uname -a
Linux tuletapio2-lp3 4.13.0-16-generic #19~lp1706247 SMP Wed Nov 1 23:21:53 UTC 2017 ppc64le ppc64le ppc64le GNU/Linux

[ 101.664761] kernel BUG at /home/jsalisbury/bugs/lp1706247/artful/ubuntu-artful/mm/slub.c:4034!
[ 101.664781] Oops: Exception in kernel mode, sig: 5 [#1]
[ 101.664785] SMP NR_CPUS=2048
[ 101.664785] NUMA
[ 101.664788] pSeries
[ 101.664792] Modules linked in: btrfs xor raid6_pq vmx_crypto crct10dif_vpmsum ip_tables x_tables autofs4 ibmveth ibmvscsi crc32c_vpmsum
[ 101.664807] CPU: 60 PID: 2151 Comm: sh Not tainted 4.13.0-16-generic #19~lp1706247
[ 101.664812] task: c000000fd2755900 task.stack: c000000fd27b8000
[ 101.664816] NIP: c0000000003630a4 LR: c0000000003630b8 CTR: c000000000150280
[ 101.664820] REGS: c000000fd27bb760 TRAP: 0700 Not tainted (4.13.0-16-generic)
[ 101.664824] MSR: 800000000282b033 <SF,VEC,VSX,EE,FP,ME,IR,DR,RI,LE>
[ 101.664829] CR: 24002828 XER: 00000000
[ 101.664835] CFAR: c0000000003630c4 SOFTE: 1
[ 101.664835] GPR00: c0000000003630b8 c000000fd27bb9e0 c000000001603300 0000000000000001
[ 101.664835] GPR04: c0000007fc010000 c0000007ffff3d80 f000000001ff03a0 0000000000000100
[ 101.664835] GPR08: c0000007ffff3c80 c0000007fc03fd90 0000000000000001 00000000ffffffff
[ 101.664835] GPR12: 0000000024002822 c00000000fae7600 f000000000000000 0000000000000000
[ 101.664835] GPR16: 00000000003fffff 0000000000140000 c0000000018e9400 f000000004ffffc0
[ 101.664835] GPR20: 0000000000000000 c000000001633b00 0000000000000002 00000000ffffb370
[ 101.664835] GPR24: 0000000000000001 0000000000001000 c000000fd27bbb70 0000000000000000
[ 101.664835] GPR28: c0000000014cadd8 0000000000000010 c0000000014cae38 c0000007fc03fd80
[ 101.664883] NIP [c0000000003630a4] slab_memory_callback+0x1d4/0x320
[ 101.664887] LR [c0000000003630b8] slab_memory_callback+0x1e8/0x320
[ 101.664890] Call Trace:
[ 101.664893] [c000000fd27bb9e0] [c0000000003630b8] slab_memory_callback+0x1e8/0x320 (unreliable)
[ 101.664901] [c000000fd27bba40] [c00000000012bacc] notifier_call_chain+0x9c/0x110
[ 101.664906] [c000000fd27bba90] [c00000000012c704] blocking_notifier_call_chain+0x64/0xa0
[ 101.664912] [c000000fd27bbad0] [c000000000824340] memory_notify+0x30/0x50
[ 101.664917] [c000000fd27bbaf0] [c000000000367678] __offline_pages.constprop.6+0xaa8/0xb10
[ 101.664923] [c000000fd27bbc30] [c0000000008241d8] memory_subsys_offline+0x68/0xd0
[ 101.664928] [c000000fd27bbc60] [c0000000007f7b68] device_offline+0xc8/0x140
[ 101.664933] [c000000fd27bbca0] [c000000000824040] store_mem_state+0x190/0x1b0
[ 101.664938] [c000000fd27bbce0] [c0000000007f27dc] dev_attr_store+0x3c/0x60
[ 101.664943] [c000000fd27bbd00] [c000000000469bd4] sysfs_kf_write+0x64/0x90
[ 101.664948] [c000000fd27bbd20] [c00000000046883c] kernfs_fop_write+0x1ac/0x270
[ 101.664954] [c000000fd27bbd70] [c00000000039d5cc] __vfs_write+0x3c/0x70
[ 101.664959] [c000000fd27bbd90] [c00000000039f208] vfs_write+0xd8/0x220
[ 101.664964] [c000000fd27bbde0] [c0000000003a1088] SyS_write+0x68/0x110
[ 101.664969] [c000000fd27bbe30] [c00000000000b184] system_call+0x58/0x6c
[ 101.664973] Instruction dump:
[ 101.664976] ebfe0000 7fbff000 3bffff98 419e0160 fb610038 7bbd1f24 3b600000 7d3fea14
[ 101.664983] e8890150 2fa40000 419e001c e9440020 <0b0a0000> fb690150 3c62002f e863a198
[ 101.664990] ---[ end trace b02bc4a6b8dd8da5 ]---
[ 101.667737]