** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** No longer affects: kernel-package (Ubuntu)
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https://bugs.launchpad.net/bugs/1755393
Title:
hot-add CPU cause VM with ubuntu-16.04.4-desktop-64bit /
ubuntu-18.04-desktop hang
Status in linux package in Ubuntu:
Incomplete
Bug description:
hot-add CPU cause VM with ubuntu-16.04.4-desktop-64bit hang in ESXi
Reproduce:
---------------------
1. create VM with EFI firewall in ESXi
2. install geustOS with ubuntu16.04.4-dsktop-64bit image.
3. reboot it after finish installation
4. edit VM setting and enable hot-add CPU and memory
5. edit VM setting and set default 1 vCPU to 2
6. open a terminal and run script to enable vcpu1: "sudo
~/rescanCpu.sh"
7. check the cpu number with command "cat /proc/cpuinfo" in terminal.
but there is not output message for this command. click anywhere on
VM desktop, there is no response. It seems like VM hang.
From vmware developer's analysis:
------------------------------------
Looks to me like Ubuntu's problem. It noticed at 566 seconds after
boot that CPU1 was hot-added. Then perhaps you run code to online
CPU, and doing so ended up with warning at blk-mq.c:
Mar 6 17:41:33 vmware-virtual-machine kernel: [ 566.583896] CPU1 has been
hot-added
Mar 6 17:42:17 vmware-virtual-machine CommAmqpListener[2376]: Initializing
CommAmqpListener
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.431990] SMP
alternatives: switching to SMP code
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.487612] x86: Booting
SMP configuration:
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.487616] smpboot:
Booting Node 0 Processor 1 APIC 0x2
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.489517] Disabled fast
string operations
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.492082] smpboot: CPU 1
Converting physical 2 to logical package 1
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.493162] Will online and
init hotplugged CPU: 1
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.524713] ------------[
cut here ]------------
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.524726] WARNING: CPU: 1
PID: 2402 at /build/linux-hwe-4GXcua/linux-hwe-4.13.0/block/blk-mq.c:1106
__blk_mq_run_hw_queue+0x7b/0xa0
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.524727] Modules linked
in: vmw_vsock_vmci_transport vsock nls_iso8859_1 vmw_balloon sb_edac
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64
crypto_simd glue_helpe
r cryptd intel_rapl_perf joydev input_leds serio_raw shpchp vmw_vmci
i2c_piix4 nfit tpm_crb mac_hid parport_pc ppdev lp parport autofs4 vmw_pvscsi
vmwgfx ttm drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt fb_sys_fops
mptspi mptscsih drm
mptbase nvme nvme_core vmxnet3 scsi_transport_spi ahci libahci pata_acpi
floppy
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525006] CPU: 1 PID:
2402 Comm: kworker/1:0H Not tainted 4.13.0-36-generic #40~16.04.1-Ubuntu
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525008] Hardware name:
VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS
VMW71.00V.7915097.B64.1802282254 02/28/2018
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525013] Workqueue:
kblockd blk_mq_run_work_fn
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525016] task:
ffff8ab5326b0000 task.stack: ffffa694441d8000
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525021] RIP:
0010:__blk_mq_run_hw_queue+0x7b/0xa0
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525023] RSP:
0018:ffffa694441dbe38 EFLAGS: 00010202
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525026] RAX:
0000000000000001 RBX: ffff8ab50b4edc00 RCX: ffff8ab53c662760
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525028] RDX:
ffff8ab50b9cba60 RSI: ffff8ab50b4edc40 RDI: ffff8ab50b4edc00
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525029] RBP:
ffffa694441dbe50 R08: 0000000000000000 R09: 0000000000000001
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525031] R10:
00000000000002e2 R11: 000000000000029b R12: ffff8ab5310d69c0
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525032] R13:
ffff8ab53c662740 R14: ffff8ab53c668300 R15: 0000000000000000
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525036] FS:
0000000000000000(0000) GS:ffff8ab53c640000(0000) knlGS:0000000000000000
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525038] CS: 0010 DS:
0000 ES: 0000 CR0: 0000000080050033
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525039] CR2:
00007ff14dd7ab00 CR3: 000000001180a002 CR4: 00000000001606e0
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525140] Call Trace:
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525148]
blk_mq_run_work_fn+0x2c/0x30
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525156]
process_one_work+0x15b/0x410
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525161]
worker_thread+0x4b/0x460
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525164]
kthread+0x10c/0x140
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525168] ?
process_one_work+0x410/0x410
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525172] ?
kthread_create_on_node+0x70/0x70
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525178]
ret_from_fork+0x35/0x40
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525181] Code: 00 e8 aa
fc 4d 00 4c 89 e7 e8 92 a4 cb ff 48 89 df 41 89 c5 e8 07 5c 00 00 44 89 ee 4c
89 e7 e8 ac a4 cb ff 5b 41 5c 41 5d 5d c3 <0f> ff f6 83 b0 00 00 00 20 75 c4 48
89 df e8 e2
5b 00 00 5b 41
Mar 6 17:42:17 vmware-virtual-machine kernel: [ 610.525233] ---[ end trace
d41f096b2f6750c5 ]---
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089082] ------------[
cut here ]------------
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089096] WARNING: CPU: 1
PID: 2407 at /build/linux-hwe-4GXcua/linux-hwe-4.13.0/block/blk-mq.c:1106
__blk_mq_run_hw_queue+0x7b/0xa0
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089097] Modules linked
in: vmw_vsock_vmci_transport vsock nls_iso8859_1 vmw_balloon sb_edac
crct10dif_pclmul crc32_pclmul ghash_clmulni_intel pcbc aesni_intel aes_x86_64
crypto_simd glue_helpe
r cryptd intel_rapl_perf joydev input_leds serio_raw shpchp vmw_vmci
i2c_piix4 nfit tpm_crb mac_hid parport_pc ppdev lp parport autofs4 vmw_pvscsi
vmwgfx ttm drm_kms_helper psmouse syscopyarea sysfillrect sysimgblt fb_sys_fops
mptspi mptscsih drm
mptbase nvme nvme_core vmxnet3 scsi_transport_spi ahci libahci pata_acpi
floppy
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089234] CPU: 1 PID:
2407 Comm: kworker/1:1H Tainted: G W 4.13.0-36-generic
#40~16.04.1-Ubuntu
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089236] Hardware name:
VMware, Inc. VMware7,1/440BX Desktop Reference Platform, BIOS
VMW71.00V.7915097.B64.1802282254 02/28/2018
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089241] Workqueue:
kblockd blk_mq_run_work_fn
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089244] task:
ffff8ab535c71740 task.stack: ffffa694401b8000
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089249] RIP:
0010:__blk_mq_run_hw_queue+0x7b/0xa0
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089251] RSP:
0000:ffffa694401bbe38 EFLAGS: 00010202
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089254] RAX:
0000000000000001 RBX: ffff8ab50b4edc00 RCX: ffff8ab53c662760
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089255] RDX:
ffff8ab50b9cba60 RSI: ffff8ab50b4edc40 RDI: ffff8ab50b4edc00
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089257] RBP:
ffffa694401bbe50 R08: 0000000000000000 R09: 0000000000000000
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089259] R10:
0000000000000289 R11: 0000000000000217 R12: ffff8ab53119e000
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089260] R13:
ffff8ab53c662740 R14: ffff8ab53c668300 R15: 0000000000000000
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089263] FS:
0000000000000000(0000) GS:ffff8ab53c640000(0000) knlGS:0000000000000000
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089265] CS: 0010 DS:
0000 ES: 0000 CR0: 0000000080050033
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089267] CR2:
0000000000436690 CR3: 000000001180a004 CR4: 00000000001606e0
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089374] Call Trace:
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089383]
blk_mq_run_work_fn+0x2c/0x30
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089391]
process_one_work+0x15b/0x410
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089395]
worker_thread+0x4b/0x460
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089399]
kthread+0x10c/0x140
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089403] ?
process_one_work+0x410/0x410
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089406] ?
kthread_create_on_node+0x70/0x70
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089412]
ret_from_fork+0x35/0x40
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089415] Code: 00 e8 aa
fc 4d 00 4c 89 e7 e8 92 a4 cb ff 48 89 df 41 89 c5 e8 07 5c 00 00 44 89 ee 4c
89 e7 e8 ac a4 cb ff 5b 41 5c 41 5d 5d c3 <0f> ff f6 83 b0 00 00 00 20 75 c4 48
89 df e8 e2
5b 00 00 5b 41
Mar 6 17:42:22 vmware-virtual-machine kernel: [ 615.089467] ---[ end trace
d41f096b2f6750c6 ]---
After this no more userspace ever run. Apparently kernel somehow
ended up with believing CPU1 is in interrupt, breaking all stuff.
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