That one completed one run of the test OK, but then crashed on the
second one, when bringing CPU 15 back online, with the following dmesg
output:
[ 160.596312] EDAC MC0: Giving out device to module sb_edac.c controller
Haswell SrcID#1_Ha#0: DEV 0000:ff:12.0 (INTERRUPT)
[ 160.596537] EDAC MC1: Giving out device to module sb_edac.c controller
Haswell SrcID#0_Ha#0: DEV 0000:7f:12.0 (INTERRUPT)
[ 160.596679] EDAC sbridge: Some needed devices are missing
[ 160.627089] EDAC MC: Removed device 0 for sb_edac.c Haswell SrcID#1_Ha#0:
DEV 0000:ff:12.0
[ 160.651100] EDAC MC: Removed device 1 for sb_edac.c Haswell SrcID#0_Ha#0:
DEV 0000:7f:12.0
[ 160.651271] EDAC sbridge: Couldn't find mci handler
[ 160.651422] EDAC sbridge: Couldn't find mci handler
[ 160.651572] EDAC sbridge: Failed to register device with error -19.
[ 161.099074] BUG: unable to handle kernel paging request at 0000000180040100
[ 161.099512] IP: __kmalloc_node+0x135/0x2a0
[ 161.099704] PGD 1ff1f01067
[ 161.099705] P4D 1ff1f01067
[ 161.099871] PUD 0
[ 161.100373] Oops: 0000 [#2] SMP
[ 161.100548] Modules linked in: nls_iso8859_1 intel_rapl x86_pkg_temp_thermal
intel_powerclamp coretemp intel_cstate kvm_intel kvm irqbypass intel_rapl_perf
joydev input_leds ipmi_ssif ipmi_si ipmi_devintf ipmi_msghandler mei_me mei
shpchp lpc_ich acpi_pad mac_hid acpi_power_meter ib_iser rdma_cm iw_cm ib_cm
ib_core iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi autofs4 btrfs
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 raid0 multipath linear ses enclosure
scsi_transport_sas fnic crct10dif_pclmul crc32_pclmul mgag200
ghash_clmulni_intel ttm pcbc igb hid_generic drm_kms_helper aesni_intel dca
syscopyarea i2c_algo_bit sysfillrect aes_x86_64 sysimgblt usbhid libfcoe
crypto_simd fb_sys_fops ahci ptp glue_helper hid mxm_wmi libfc cryptd libahci
[ 161.102507] pps_core drm enic scsi_transport_fc megaraid_sas wmi
[ 161.102856] CPU: 2 PID: 3686 Comm: python3 Tainted: G D
4.13.0-13-generic #14~lp1733662Commit8d9d2235a82ea41
[ 161.103230] Hardware name: Cisco Systems Inc UCSC-C240-M4L/UCSC-C240-M4L,
BIOS C240M4.2.0.10c.0.032320160820 03/23/2016
[ 161.103624] task: ffff8f3de5989740 task.stack: ffffa3a7ce288000
[ 161.104024] RIP: 0010:__kmalloc_node+0x135/0x2a0
[ 161.104431] RSP: 0018:ffffa3a7ce28bc30 EFLAGS: 00010246
[ 161.104846] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000f95
[ 161.105274] RDX: 0000000000000f94 RSI: 0000000000000000 RDI: 000000000001f3e0
[ 161.105705] RBP: ffffa3a7ce28bc70 R08: ffff8f3dffc9f3e0 R09: ffff8f3dff807c00
[ 161.106148] R10: ffffffffbb017760 R11: ffff8f5df8fa21f2 R12: 00000000014080c0
[ 161.106599] R13: 0000000000000008 R14: 0000000180040100 R15: ffff8f3dff807c00
[ 161.107057] FS: 00007f7849b98700(0000) GS:ffff8f3dffc80000(0000)
knlGS:0000000000000000
[ 161.107530] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 161.108014] CR2: 0000000180040100 CR3: 0000001ff6e6e000 CR4: 00000000001406e0
[ 161.108509] Call Trace:
[ 161.109012] ? alloc_cpumask_var_node+0x1f/0x30
[ 161.109523] ? on_each_cpu_cond+0x160/0x160
[ 161.110036] alloc_cpumask_var_node+0x1f/0x30
[ 161.110558] zalloc_cpumask_var_node+0xf/0x20
[ 161.111084] smpcfd_prepare_cpu+0x64/0xc0
[ 161.111615] cpuhp_invoke_callback+0x84/0x3b0
[ 161.112151] cpuhp_up_callbacks+0x36/0xc0
[ 161.112690] _cpu_up+0x87/0xd0
[ 161.113235] do_cpu_up+0x8b/0xb0
[ 161.113785] cpu_up+0x13/0x20
[ 161.114342] cpu_subsys_online+0x3d/0x90
[ 161.114881] device_online+0x4a/0x90
[ 161.115422] online_store+0x89/0xa0
[ 161.115951] dev_attr_store+0x18/0x30
[ 161.116472] sysfs_kf_write+0x37/0x40
[ 161.116994] kernfs_fop_write+0x11c/0x1a0
[ 161.117510] __vfs_write+0x18/0x40
[ 161.118029] vfs_write+0xb1/0x1a0
[ 161.118544] SyS_write+0x55/0xc0
[ 161.119062] entry_SYSCALL_64_fastpath+0x1e/0xa9
[ 161.119581] RIP: 0033:0x7f78497784a0
[ 161.120081] RSP: 002b:00007fff6e69ed48 EFLAGS: 00000246 ORIG_RAX:
0000000000000001
[ 161.120602] RAX: ffffffffffffffda RBX: 0000000001ea8410 RCX: 00007f78497784a0
[ 161.121129] RDX: 0000000000000002 RSI: 0000000001fbe400 RDI: 0000000000000003
[ 161.121666] RBP: 0000000000a3e020 R08: 0000000000000000 R09: 0000000000000001
[ 161.122202] R10: 0000000000000100 R11: 0000000000000246 R12: 0000000000000003
[ 161.122720] R13: 0000000000501520 R14: 00007fff6e69f1b0 R15: 00007f7848690240
[ 161.123226] Code: 89 cf 4c 89 4d c0 e8 0b 7f 01 00 49 89 c7 4c 8b 4d c0 4d
85 ff 0f 85 47 ff ff ff 45 31 f6 eb 3c 49 63 47 20 49 8b 3f 48 8d 4a 01 <49> 8b
1c 06 4c 89 f0 65 48 0f c7 0f 0f 94 c0 84 c0 0f 84 20 ff
[ 161.124251] RIP: __kmalloc_node+0x135/0x2a0 RSP: ffffa3a7ce28bc30
[ 161.124738] CR2: 0000000180040100
[ 161.125220] ---[ end trace 1246d63efc5b2bf0 ]---
Rather than hang, as has happened before, the script crashed ("Killed"
was displayed and I was dropped back to a bash prompt). The system
behaved unreliably and I was forced to reboot it via its BMC.
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https://bugs.launchpad.net/bugs/1733662
Title:
System hang with Linux kernel 4.13, not with 4.10
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