** Changed in: linux (Ubuntu)
       Status: Fix Committed => Fix Released

** Changed in: linux (Ubuntu Xenial)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1712626

Title:
  Cannot launch virtual instance on nova host after upgrading to kernel
  4.4.0.92- works with 4.4.0.83

Status in linux package in Ubuntu:
  Fix Released
Status in linux source package in Xenial:
  Fix Released

Bug description:
  Host -- IBM Power 8  822L
  OS- Ubuntu 14.04 ppc64el
  previous kernel 3.19.0.68
  Nova Compute host using kvm - Openstack Liberty

  HWE was out of date so needed to update

  Steps:

  sudo apt-get install linux-generic-lts-xenial linux-image-generic-lts-xenial
  sudo init 6
  sudo apt update
  sudo apt upgrade
  sudo init 6

  afterwards - system seemed ok - kernel 4.4.0.92 installed

  However, launching a Ubuntu VM failed

  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246360] Facility 'TM' unavailable, 
exception at 0xd0000000189f85a0, MSR=9000000000009033
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246374] Oops: Unexpected facility 
unavailable exception, sig: 6 [#1]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246379] SMP NR_CPUS=2048 NUMA PowerNV
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246385] Modules linked in: vhost_net 
vhost macvtap macvlan xt_REDIRECT nf_nat_redirect xt_mark xt_nat ip6table_raw 
nf_conntrack_ipv6
   xt_CT xt_mac xt_comment xt_physdev br_netfilter iptable_raw veth xt_CHECKSUM 
iptable_mangle ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_nat_ipv4 
nf_nat nf_conntrac
  k_ipv4 nf_defrag_ipv4 xt_conntrack ipt_REJECT nf_reject_ipv4 xt_tcpudp 
ebtable_filter ebtables ip6table_filter ip6_tables iptable_filter ip_tables 
x_tables vport_gre ip_gre 
  ip_tunnel gre nbd kvm_hv kvm ib_iser rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core 
ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi openvswitch 
nf_defrag_ipv6 nf_conn
  track dm_crypt bridge stp llc dm_multipath uio_pdrv_genirq ipmi_powernv 
ipmi_msghandler uio ibmpowernv powernv_rng vmx_crypto leds_powernv ses 
enclosure bnx2x vxlan ip6_udp_
  tunnel udp_tunnel mdio libcrc32c ipr
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246500] CPU: 96 PID: 52779 Comm: 
qemu-system-ppc Not tainted 4.4.0-92-generic #115~14.04.1-Ubuntu
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246506] task: c000001e228dcf60 ti: 
c000001e229f4000 task.ti: c000001e229f4000
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246511] NIP: d0000000189f85a0 LR: 
d0000000188a2584 CTR: d0000000189f84f0
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246516] REGS: c000001e229f7840 TRAP: 
0f60   Not tainted  (4.4.0-92-generic)
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246519] MSR: 9000000000009033 
<SF,HV,EE,ME,IR,DR,RI,LE>  CR: 28022448  XER: 00000000
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] CFAR: d0000000189f8534 
SOFTE: 1 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR00: d0000000188a2584 
c000001e229f7ac0 d000000018a0c7f8 c000001c4c680000 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR04: c000001c53080000 
c000001e229f7bc0 0000000000000000 0000000000040000 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR08: 0000000000000001 
c000001e228dcf60 0000000000000000 d0000000188a7518 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR12: d0000000189f84f0 
c00000000fb79000 00003fff7d74ed40 00003fff7d74f3d0 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR16: 00003fff7cf50000 
0000000000000000 0000000000000003 00003fff7d750010 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR20: 00000000100c0570 
000001000f6ebba0 0000000000800000 00003fff85644330 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR24: 0000000000000000 
00003fff7cf30028 00000000d4f6d401 0000000000000010 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246534] GPR28: 0000000000000000 
c000001c4c680000 c000001c4c680000 c000001c53080000 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246594] NIP [d0000000189f85a0] 
kvmppc_vcpu_run_hv+0xb0/0x610 [kvm_hv]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246606] LR [d0000000188a2584] 
kvmppc_vcpu_run+0x44/0x60 [kvm]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246610] Call Trace:
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246617] [c000001e229f7ac0] 
[c0000000000ca294] recalc_sigpending+0x24/0x90 (unreliable)
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246630] [c000001e229f7b70] 
[d0000000188a2584] kvmppc_vcpu_run+0x44/0x60 [kvm]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246642] [c000001e229f7ba0] 
[d00000001889f274] kvm_arch_vcpu_ioctl_run+0x64/0x180 [kvm]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246653] [c000001e229f7be0] 
[d000000018893898] kvm_vcpu_ioctl+0x5e8/0x7c0 [kvm]
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246661] [c000001e229f7d40] 
[c0000000002ef7d0] do_vfs_ioctl+0x4d0/0x7e0
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246667] [c000001e229f7de0] 
[c0000000002efbb4] SyS_ioctl+0xd4/0xf0
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246673] [c000001e229f7e30] 
[c000000000009204] system_call+0x38/0xb4
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246677] Instruction dump:
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246681] e92d02a0 e9290a50 e9290108 
792807e3 41820058 e92d02a0 e9290a50 e9290108 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246690] 792ae8a4 794a1f87 40820508 
e92d02a0 <7d4022a6> f9490ee8 e92d02a0 7d4122a6 
  Aug 23 11:38:25 rcsnode03 kernel: [ 3270.246705] ---[ end trace 
df289857e3c4915a ]---

  Installing kernel 4.4.0.83 and booting off it resolved issue.

  Problem seems to be related to post 4.4.0.83 kernels

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