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[Emsi <trash1@xxxxxxxxxxx>]

Now I got much more verbose error:


[Wed Mar 30 11:38:59 2016] NMI watchdog: BUG: soft lockup - CPU#1 stuck for 25s! [init:1321]
[Wed Mar 30 11:38:59 2016] Modules linked in: btrfs(E) xor(E) raid6_pq(E) ufs(E) qnx4(E) hfsplus(E) hfs(E) minix(E) ntfs(E) msdos(E) jfs(E) xfs(E) libcrc32c(E) xt_nat xt_tcpudp veth xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs sit tunnel4 ip_tunnel i2c_piix4 input_leds serio_raw hyperv_fb hyperv_keyboard 8250_fintek joydev mac_hid autofs4 hid_generic hv_netvsc hid_hyperv hv_utils hid hv_storvsc crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse pata_acpi hv_vmbus floppy
[Wed Mar 30 11:38:59 2016] CPU: 1 PID: 1321 Comm: init Tainted: G            E   4.2.0-30-generic #35-Ubuntu
[Wed Mar 30 11:38:59 2016] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006  05/23/2012
[Wed Mar 30 11:38:59 2016] task: ffff88003585b700 ti: ffff8800f3bb0000 task.ti: ffff8800f3bb0000
[Wed Mar 30 11:38:59 2016] RIP: 0010:[<ffffffff816d748e>]  [<ffffffff816d748e>] __build_skb+0xbe/0x100
[Wed Mar 30 11:38:59 2016] RSP: 0018:ffff880102643c08  EFLAGS: 00010286
[Wed Mar 30 11:38:59 2016] RAX: 00000000ffffffff RBX: 0000000000000000 RCX: 00000000ffffffff
[Wed Mar 30 11:38:59 2016] RDX: ffff8800ee0ea400 RSI: 0000000000000020 RDI: ffff8800f08221c0
[Wed Mar 30 11:38:59 2016] RBP: ffff880102643c18 R08: 00000000000003c0 R09: ffff8800ee0ea400
[Wed Mar 30 11:38:59 2016] R10: 0000000000000003 R11: 0000000000000004 R12: ffff880102643b78
[Wed Mar 30 11:38:59 2016] R13: ffffffff817f4a9b R14: ffff880102643c18 R15: 0000000000000600
[Wed Mar 30 11:38:59 2016] FS:  00007ffa15ff9800(0000) GS:ffff880102640000(0000) knlGS:0000000000000000
[Wed Mar 30 11:38:59 2016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Wed Mar 30 11:38:59 2016] CR2: 00007f1407ee4000 CR3: 0000000035929000 CR4: 00000000001406e0
[Wed Mar 30 11:38:59 2016] Stack:
[Wed Mar 30 11:38:59 2016]  0000000000000500 ffff88010115c000 ffff880102643c58 ffffffff816d7615
[Wed Mar 30 11:38:59 2016]  00000000000003ff ffff88010115c000 ffff880102643d38 ffffc90001b70c78
[Wed Mar 30 11:38:59 2016]  ffff880035158400 ffff880102660a48 ffff880102643ca8 ffffffffc012fbae
[Wed Mar 30 11:38:59 2016] Call Trace:
[Wed Mar 30 11:38:59 2016]  <IRQ>
[Wed Mar 30 11:38:59 2016]  [<ffffffff816d7615>] __netdev_alloc_skb+0xc5/0x110
[Wed Mar 30 11:38:59 2016]  [<ffffffffc012fbae>] netvsc_recv_callback+0x6e/0x150 [hv_netvsc]
[Wed Mar 30 11:38:59 2016]  [<ffffffffc0131b91>] rndis_filter_receive+0x131/0x5b0 [hv_netvsc]
[Wed Mar 30 11:38:59 2016]  [<ffffffffc001ef76>] ? hv_copyfrom_ringbuffer+0x46/0x90 [hv_vmbus]
[Wed Mar 30 11:38:59 2016]  [<ffffffffc012ffb4>] netvsc_receive+0x114/0x1f0 [hv_netvsc]
[Wed Mar 30 11:38:59 2016]  [<ffffffffc001d48b>] ? vmbus_recvpacket_raw+0x9b/0xe0 [hv_vmbus]
[Wed Mar 30 11:38:59 2016]  [<ffffffffc0130220>] netvsc_channel_cb+0x190/0x3f0 [hv_netvsc]
[Wed Mar 30 11:38:59 2016]  [<ffffffff810ab4db>] ? sched_clock_local+0x1b/0x90
[Wed Mar 30 11:38:59 2016]  [<ffffffffc001c4c4>] vmbus_on_event+0x154/0x190 [hv_vmbus]
[Wed Mar 30 11:38:59 2016]  [<ffffffff8107f7af>] tasklet_action+0xdf/0x100
[Wed Mar 30 11:38:59 2016]  [<ffffffff8107fe46>] __do_softirq+0xf6/0x250
[Wed Mar 30 11:38:59 2016]  [<ffffffff81080113>] irq_exit+0xa3/0xb0
[Wed Mar 30 11:38:59 2016]  [<ffffffff8104b352>] hyperv_vector_handler+0x42/0x60
[Wed Mar 30 11:38:59 2016]  [<ffffffff817f4a9b>] hyperv_callback_vector+0x6b/0x70
[Wed Mar 30 11:38:59 2016]  <EOI>
[Wed Mar 30 11:38:59 2016]  [<ffffffff8136be74>] ? __aa_path_perm+0xf4/0x110
[Wed Mar 30 11:38:59 2016]  [<ffffffff813d37a5>] ? copy_user_enhanced_fast_string+0x5/0x10
[Wed Mar 30 11:38:59 2016]  [<ffffffff81211f51>] ? set_fd_set+0x21/0x30
[Wed Mar 30 11:38:59 2016]  [<ffffffff81212ce2>] core_sys_select+0x202/0x2f0
[Wed Mar 30 11:38:59 2016]  [<ffffffff81202ef6>] ? cp_new_stat+0x156/0x190
[Wed Mar 30 11:38:59 2016]  [<ffffffff81133fa8>] ? seccomp_phase1+0x98/0x290
[Wed Mar 30 11:38:59 2016]  [<ffffffffc001b64c>] ? read_hv_clock_tsc+0x3c/0x90 [hv_vmbus]
[Wed Mar 30 11:38:59 2016]  [<ffffffff810edc05>] ? ktime_get_ts64+0x45/0xf0
[Wed Mar 30 11:38:59 2016]  [<ffffffff81212e8a>] SyS_select+0xba/0x110
[Wed Mar 30 11:38:59 2016]  [<ffffffff817f2d72>] entry_SYSCALL_64_fastpath+0x16/0x75
[Wed Mar 30 11:38:59 2016] Code: a2 d0 00 00 00 4c 89 a2 d8 00 00 00 c7 82 c8 00 00 00 00 00 00 00 44 89 82 cc 00 00 00 66 89 82 c6 00 00 00 66 89 8a c2 00 00 00 <48> c7 07 00 00 00 00 48 c7 47 08 00 00 00 00 48 c7 47 10 00 00
[Wed Mar 30 11:39:02 2016] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [exe:1315]
[Wed Mar 30 11:39:02 2016] Modules linked in: btrfs(E) xor(E) raid6_pq(E) ufs(E) qnx4(E) hfsplus(E) hfs(E) minix(E) ntfs(E) msdos(E) jfs(E) xfs(E) libcrc32c(E) xt_nat xt_tcpudp veth xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs sit tunnel4 ip_tunnel i2c_piix4 input_leds serio_raw hyperv_fb hyperv_keyboard 8250_fintek joydev mac_hid autofs4 hid_generic hv_netvsc hid_hyperv hv_utils hid hv_storvsc crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse pata_acpi hv_vmbus floppy
[Wed Mar 30 11:39:02 2016] CPU: 0 PID: 1315 Comm: exe Tainted: G            EL  4.2.0-30-generic #35-Ubuntu
[Wed Mar 30 11:39:02 2016] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006  05/23/2012
[Wed Mar 30 11:39:02 2016] task: ffff8800ee3b3700 ti: ffff8800f2d64000 task.ti: ffff8800f2d64000
[Wed Mar 30 11:39:02 2016] RIP: 0010:[<ffffffff817f2ab0>]  [<ffffffff817f2ab0>] _raw_spin_lock+0x10/0x30
[Wed Mar 30 11:39:02 2016] RSP: 0018:ffff8800f2d67c98  EFLAGS: 00010246
[Wed Mar 30 11:39:02 2016] RAX: 0000000000000000 RBX: ffffc90000774f00 RCX: 0000000000000000
[Wed Mar 30 11:39:02 2016] RDX: 0000000000000001 RSI: ffff8800ee3b3700 RDI: ffffc90000774f04
[Wed Mar 30 11:39:02 2016] RBP: ffff8800f2d67c98 R08: ffff8800f2d64000 R09: ffff880102616670
[Wed Mar 30 11:39:02 2016] R10: 0000000000000020 R11: 0000000000000004 R12: ffff8800f2d68000
[Wed Mar 30 11:39:02 2016] R13: 0000000000000040 R14: ffff8800ee3b3700 R15: ffffffff81c13500
[Wed Mar 30 11:39:02 2016] FS:  00007f3d7c08e700(0000) GS:ffff880102600000(0000) knlGS:0000000000000000
[Wed Mar 30 11:39:02 2016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Wed Mar 30 11:39:02 2016] CR2: 0000000000606d1c CR3: 00000000f2d8d000 CR4: 00000000001406f0
[Wed Mar 30 11:39:02 2016] Stack:
[Wed Mar 30 11:39:02 2016]  ffff8800f2d67df8 ffffffff810f9391 ffff8800f2d67d18 ffffffff35b73700
[Wed Mar 30 11:39:02 2016]  ffff8800f2d67ef8 ffff8800f2d67d30 0000000100000000 000000000209c260
[Wed Mar 30 11:39:02 2016]  0000000100000000 ffffc90000774f00 0000000000000064 ffff8800f2d67cf0
[Wed Mar 30 11:39:02 2016] Call Trace:
[Wed Mar 30 11:39:02 2016]  [<ffffffff810f9391>] futex_wait+0x131/0x280
[Wed Mar 30 11:39:02 2016]  [<ffffffff810e8220>] ? __hrtimer_init+0x90/0x90
[Wed Mar 30 11:39:02 2016]  [<ffffffff810f9050>] ? futex_wait_queue_me+0xa0/0x120
[Wed Mar 30 11:39:02 2016]  [<ffffffff810fbba6>] do_futex+0x126/0x510
[Wed Mar 30 11:39:02 2016]  [<ffffffffc001b64c>] ? read_hv_clock_tsc+0x3c/0x90 [hv_vmbus]
[Wed Mar 30 11:39:02 2016]  [<ffffffff810edc05>] ? ktime_get_ts64+0x45/0xf0
[Wed Mar 30 11:39:02 2016]  [<ffffffffc001b64c>] ? read_hv_clock_tsc+0x3c/0x90 [hv_vmbus]
[Wed Mar 30 11:39:02 2016]  [<ffffffff810fc011>] SyS_futex+0x81/0x180
[Wed Mar 30 11:39:02 2016]  [<ffffffff817f2d72>] entry_SYSCALL_64_fastpath+0x16/0x75
[Wed Mar 30 11:39:02 2016] Code: 00 00 f0 0f b1 17 85 c0 75 02 5d c3 89 c6 e8 b8 1c 8d ff 66 90 5d c3 0f 1f 40 00 0f 1f 44 00 00 55 48 89 e5 31 c0 ba 01 00 00 00 <f0> 0f b1 17 85 c0 75 02 5d c3 89 c6 e8 8f 1c 8d ff 66 90 5d c3
[Wed Mar 30 11:39:08 2016] NMI watchdog: BUG: soft lockup - CPU#2 stuck for 21s! [systemd-udevd:350]
[Wed Mar 30 11:39:08 2016] Modules linked in: btrfs(E) xor(E) raid6_pq(E) ufs(E) qnx4(E) hfsplus(E) hfs(E) minix(E) ntfs(E) msdos(E) jfs(E) xfs(E) libcrc32c(E) xt_nat xt_tcpudp veth xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs sit tunnel4 ip_tunnel i2c_piix4 input_leds serio_raw hyperv_fb hyperv_keyboard 8250_fintek joydev mac_hid autofs4 hid_generic hv_netvsc hid_hyperv hv_utils hid hv_storvsc crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse pata_acpi hv_vmbus floppy
[Wed Mar 30 11:39:08 2016] CPU: 2 PID: 350 Comm: systemd-udevd Tainted: G            EL  4.2.0-30-generic #35-Ubuntu
[Wed Mar 30 11:39:08 2016] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006  05/23/2012
[Wed Mar 30 11:39:08 2016] task: ffff880035838000 ti: ffff880035ae0000 task.ti: ffff880035ae0000
[Wed Mar 30 11:39:08 2016] RIP: 0010:[<ffffffff813d4c39>]  [<ffffffff813d4c39>] memset_erms+0x9/0x10
[Wed Mar 30 11:39:08 2016] RSP: 0000:ffff880102683af0  EFLAGS: 00010246
[Wed Mar 30 11:39:08 2016] RAX: 0000000000000000 RBX: 00000000e9de5601 RCX: 0000000000000060
[Wed Mar 30 11:39:08 2016] RDX: 0000000000000060 RSI: 0000000000000000 RDI: ffff8800ef739d80
[Wed Mar 30 11:39:08 2016] RBP: ffff880102683b38 R08: ffff880102699aa0 R09: ffff8800ef739d80
[Wed Mar 30 11:39:08 2016] R10: ffff8800ef739d80 R11: 0000000000000000 R12: ffff880102683a68
[Wed Mar 30 11:39:08 2016] R13: ffffffff817f4a9b R14: ffff880102683b38 R15: ffff8800ef739f60
[Wed Mar 30 11:39:08 2016] FS:  00007fd5f0ee88c0(0000) GS:ffff880102680000(0000) knlGS:0000000000000000
[Wed Mar 30 11:39:08 2016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Wed Mar 30 11:39:08 2016] CR2: 00007f366b2f5000 CR3: 0000000035272000 CR4: 00000000001406e0
[Wed Mar 30 11:39:08 2016] Stack:
[Wed Mar 30 11:39:08 2016]  ffffffff811df554 0000000000000002 ffff8800ef739d80 ffff880102683ba8
[Wed Mar 30 11:39:08 2016]  0000000000000028 0000000000000000 0000000000000040 0000000000000004
[Wed Mar 30 11:39:08 2016]  0000000000000000 ffff880102683b98 ffffffffc01ca3ba ffff880102683b98
[Wed Mar 30 11:39:08 2016] Call Trace:
[Wed Mar 30 11:39:08 2016]  <IRQ>
[Wed Mar 30 11:39:08 2016]  [<ffffffff811df554>] ? __kmalloc+0x1f4/0x250
[Wed Mar 30 11:39:08 2016]  [<ffffffffc01ca3ba>] __nf_ct_ext_add_length+0x17a/0x1b0 [nf_conntrack]
[Wed Mar 30 11:39:08 2016]  [<ffffffffc01c35e8>] ? __nf_conntrack_alloc+0xf8/0x320 [nf_conntrack]
[Wed Mar 30 11:39:08 2016]  [<ffffffffc01c4114>] nf_conntrack_in+0x8e4/0xbf0 [nf_conntrack]
[Wed Mar 30 11:39:08 2016]  [<ffffffffc02032e6>] ipv4_conntrack_in+0x26/0x30 [nf_conntrack_ipv4]
[Wed Mar 30 11:39:08 2016]  [<ffffffff8171ac67>] nf_iterate+0x97/0xb0
[Wed Mar 30 11:39:08 2016]  [<ffffffff8171acf8>] nf_hook_slow+0x78/0xd0
[Wed Mar 30 11:39:08 2016]  [<ffffffff81721fd4>] ip_rcv+0x324/0x3d0
[Wed Mar 30 11:39:08 2016]  [<ffffffff81721590>] ? inet_del_offload+0x40/0x40
[Wed Mar 30 11:39:08 2016]  [<ffffffff816e5bb5>] __netif_receive_skb_core+0x725/0xa00
[Wed Mar 30 11:39:08 2016]  [<ffffffff810a56ed>] ? ttwu_do_activate.constprop.89+0x5d/0x70
[Wed Mar 30 11:39:08 2016]  [<ffffffff810a60d6>] ? try_to_wake_up+0x1f6/0x300
[Wed Mar 30 11:39:08 2016]  [<ffffffff816e5ea8>] __netif_receive_skb+0x18/0x60
[Wed Mar 30 11:39:08 2016]  [<ffffffff816e6c18>] process_backlog+0xa8/0x150
[Wed Mar 30 11:39:08 2016]  [<ffffffff816e6410>] net_rx_action+0x210/0x320
[Wed Mar 30 11:39:08 2016]  [<ffffffff8107fe46>] __do_softirq+0xf6/0x250
[Wed Mar 30 11:39:08 2016]  [<ffffffff81080113>] irq_exit+0xa3/0xb0
[Wed Mar 30 11:39:08 2016]  [<ffffffff8104b352>] hyperv_vector_handler+0x42/0x60
[Wed Mar 30 11:39:08 2016]  [<ffffffff817f4a9b>] hyperv_callback_vector+0x6b/0x70
[Wed Mar 30 11:39:08 2016]  <EOI>
[Wed Mar 30 11:39:08 2016] Code:
[Wed Mar 30 11:39:08 2016] 48 c1 e9 03 40 0f b6 f6 48 b8 01 01 01 01 01 01 01 01 48 0f af c6 f3 48 ab 89 d1 f3 aa 4c 89 c8 c3 90 49 89 f9 40 88 f0 48 89 d1 <f3> aa 4c 89 c8 c3 90 49 89 fa 40 0f b6 ce 48 b8 01 01 01 01 01
[Wed Mar 30 11:39:43 2016] NMI watchdog: BUG: soft lockup - CPU#0 stuck for 21s! [kworker/0:0:41115]
[Wed Mar 30 11:39:43 2016] Modules linked in: btrfs(E) xor(E) raid6_pq(E) ufs(E) qnx4(E) hfsplus(E) hfs(E) minix(E) ntfs(E) msdos(E) jfs(E) xfs(E) libcrc32c(E) xt_nat xt_tcpudp veth xt_conntrack ipt_MASQUERADE nf_nat_masquerade_ipv4 iptable_nat nf_conntrack_ipv4 nf_defrag_ipv4 nf_nat_ipv4 xt_addrtype iptable_filter ip_tables x_tables nf_nat nf_conntrack br_netfilter bridge stp llc aufs sit tunnel4 ip_tunnel i2c_piix4 input_leds serio_raw hyperv_fb hyperv_keyboard 8250_fintek joydev mac_hid autofs4 hid_generic hv_netvsc hid_hyperv hv_utils hid hv_storvsc crct10dif_pclmul crc32_pclmul aesni_intel aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd psmouse pata_acpi hv_vmbus floppy
[Wed Mar 30 11:39:43 2016] CPU: 0 PID: 41115 Comm: kworker/0:0 Tainted: G            EL  4.2.0-30-generic #35-Ubuntu
[Wed Mar 30 11:39:43 2016] Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS 090006  05/23/2012
[Wed Mar 30 11:39:43 2016] Workqueue: events hv_set_host_time [hv_utils]
[Wed Mar 30 11:39:43 2016] task: ffff880035f544c0 ti: ffff8800f0f58000 task.ti: ffff8800f0f58000
[Wed Mar 30 11:39:43 2016] RIP: 0010:[<ffffffff813d5fe1>]  [<ffffffff813d5fe1>] prandom_seed+0x41/0x80
[Wed Mar 30 11:39:43 2016] RSP: 0018:ffff880102603e08  EFLAGS: 00010282
[Wed Mar 30 11:39:43 2016] RAX: 00000000a240a7f5 RBX: ffffffff814ee4ee RCX: 0000000000000024
[Wed Mar 30 11:39:43 2016] RDX: 00000000a240a7f7 RSI: 0000000000000100 RDI: ffff880102f11e40
[Wed Mar 30 11:39:43 2016] RBP: ffff880102603e28 R08: 0000000000000000 R09: ffffffffffffffff
[Wed Mar 30 11:39:43 2016] R10: 00000000a3941f2e R11: 0000000000000024 R12: ffff880102603d78
[Wed Mar 30 11:39:43 2016] R13: ffffffff817f4a9b R14: ffff880102603e28 R15: 0000000000011e40
[Wed Mar 30 11:39:43 2016] FS:  0000000000000000(0000) GS:ffff880102600000(0000) knlGS:0000000000000000
[Wed Mar 30 11:39:43 2016] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[Wed Mar 30 11:39:43 2016] CR2: 0000000000606d1c CR3: 00000000f2d8d000 CR4: 00000000001406f0
[Wed Mar 30 11:39:43 2016] Stack:
[Wed Mar 30 11:39:43 2016]  ffff88010260e9c0 ffff88010260e9c0 ffffffff81ca5a40 0000000000000100
[Wed Mar 30 11:39:43 2016]  ffff880102603e48 ffffffff813d618d 8ac0634702603e48 0000000060e934da
[Wed Mar 30 11:39:43 2016]  ffff880102603e88 ffffffff810e59d9 ffffffff81ca5a40 ffff88010260e9c0
[Wed Mar 30 11:39:43 2016] Call Trace:
[Wed Mar 30 11:39:43 2016]  <IRQ>
[Wed Mar 30 11:39:43 2016]  [<ffffffff813d618d>] __prandom_timer+0x2d/0x90
[Wed Mar 30 11:39:43 2016]  [<ffffffff810e59d9>] call_timer_fn+0x39/0xf0
[Wed Mar 30 11:39:43 2016]  [<ffffffff813d6160>] ? __prandom_reseed+0x140/0x140
[Wed Mar 30 11:39:43 2016]  [<ffffffff810e6461>] run_timer_softirq+0x221/0x2d0
[Wed Mar 30 11:39:43 2016]  [<ffffffff8107fe46>] __do_softirq+0xf6/0x250
[Wed Mar 30 11:39:43 2016]  [<ffffffff810e8580>] ? hrtimer_cancel+0x30/0x30
[Wed Mar 30 11:39:43 2016]  [<ffffffff81080113>] irq_exit+0xa3/0xb0
[Wed Mar 30 11:39:43 2016]  [<ffffffff8104b352>] hyperv_vector_handler+0x42/0x60
[Wed Mar 30 11:39:43 2016]  [<ffffffff817f4a9b>] hyperv_callback_vector+0x6b/0x70
[Wed Mar 30 11:39:43 2016]  <EOI>
[Wed Mar 30 11:39:43 2016]  [<ffffffff810fcd88>] ? smp_call_function_many+0x1f8/0x260
[Wed Mar 30 11:39:43 2016]  [<ffffffff810fcd63>] ? smp_call_function_many+0x1d3/0x260
[Wed Mar 30 11:39:43 2016]  [<ffffffff810e8580>] ? hrtimer_cancel+0x30/0x30
[Wed Mar 30 11:39:43 2016]  [<ffffffff810fced1>] on_each_cpu+0x31/0x60
[Wed Mar 30 11:39:43 2016]  [<ffffffff810e8cac>] clock_was_set+0x1c/0x30
[Wed Mar 30 11:39:43 2016]  [<ffffffff810ee545>] do_settimeofday64+0x115/0x130
[Wed Mar 30 11:39:43 2016]  [<ffffffffc0118100>] hv_set_host_time+0x50/0x80 [hv_utils]
[Wed Mar 30 11:39:43 2016]  [<ffffffff810947aa>] process_one_work+0x1aa/0x440
[Wed Mar 30 11:39:43 2016]  [<ffffffff81094a8b>] worker_thread+0x4b/0x4c0
[Wed Mar 30 11:39:43 2016]  [<ffffffff81094a40>] ? process_one_work+0x440/0x440
[Wed Mar 30 11:39:43 2016]  [<ffffffff81094a40>] ? process_one_work+0x440/0x440
[Wed Mar 30 11:39:43 2016]  [<ffffffff8109ae28>] kthread+0xd8/0xf0
[Wed Mar 30 11:39:43 2016]  [<ffffffff8109ad50>] ? kthread_create_on_node+0x1f0/0x1f0
[Wed Mar 30 11:39:43 2016]  [<ffffffff817f319f>] ret_from_fork+0x3f/0x70
[Wed Mar 30 11:39:43 2016]  [<ffffffff8109ad50>] ? kthread_create_on_node+0x1f0/0x1f0
[Wed Mar 30 11:39:43 2016] Code: 1e 01 00 48 83 ec 08 4c 8b 25 2c ae 43 00 eb 22 48 98 48 89 df 48 03 3c c5 80 9d d2 81 8b 07 44 31 e8 8d 50 02 83 f8 01 0f 46 c2 <89> 07 e8 78 ff ff ff 41 8d 53 01 be 00 01 00 00 4c 89 e7 48 63
[Wed Mar 30 11:41:10 2016] systemd[1]: systemd-timesyncd.service: Main process exited, code=killed, status=6/ABRT
[Wed Mar 30 11:41:10 2016] systemd[1]: systemd-timesyncd.service: Unit entered failed state.
[Wed Mar 30 11:41:10 2016] systemd[1]: systemd-timesyncd.service: Failed with result 'signal'.
[Wed Mar 30 11:41:10 2016] systemd[1]: systemd-timesyncd.service: Service has no hold-off time, scheduling restart.
[Wed Mar 30 11:41:10 2016] systemd[1]: Stopped Network Time Synchronization.
[Wed Mar 30 11:41:11 2016] systemd[1]: Starting Network Time Synchronization...
[Wed Mar 30 11:41:11 2016] systemd[1]: Started Network Time Synchronization.
[Wed Mar 30 11:41:11 2016] systemd[1]: Time has been changed
[Wed Mar 30 11:41:11 2016] sd 2:0:0:0: [storvsc] Sense Key : Unit Attention [current]
[Wed Mar 30 11:41:11 2016] sd 2:0:0:0: [storvsc] Add. Sense: Changed operating definition
[Wed Mar 30 11:41:11 2016] sd 2:0:0:0: Warning! Received an indication that the operating parameters on this target have changed. The Linux SCSI layer does not automa
[Wed Mar 30 11:41:11 2016] systemd[1]: systemd-journald.service: Main process exited, code=dumped, status=6/ABRT
[Wed Mar 30 11:41:11 2016] systemd[1]: systemd-journald.service: Unit entered failed state.
[Wed Mar 30 11:41:11 2016] systemd[1]: systemd-journald.service: Failed with result 'core-dump'.
[Wed Mar 30 11:41:11 2016] systemd[1]: systemd-journald.service: Service has no hold-off time, scheduling restart.
[Wed Mar 30 11:41:11 2016] systemd[1]: Stopped Flush Journal to Persistent Storage.
[Wed Mar 30 11:41:11 2016] systemd[1]: Stopping Flush Journal to Persistent Storage...
[Wed Mar 30 11:41:11 2016] systemd[1]: Stopped Journal Service.
[Wed Mar 30 11:41:11 2016] systemd[1]: Starting Journal Service...
[Wed Mar 30 11:41:12 2016] systemd-journald[18044]: File /run/log/journal/93331705177d49128dea38263665a546/system.journal corrupted or uncleanly shut down, renaming and replacing.
[Wed Mar 30 11:41:12 2016] systemd[1]: Started Journal Service.

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https://bugs.launchpad.net/bugs/1470250

Title:
  [Hyper-V] Ubuntu 14.04.2 LTS Generation 2 SCSI Errors on VSS Based
  Backups

Status in linux package in Ubuntu:
  In Progress
Status in linux source package in Trusty:
  In Progress
Status in linux source package in Vivid:
  In Progress
Status in linux source package in Wily:
  In Progress

Bug description:
  Customers have reported running various versions of Ubuntu 14.04.2 LTS
  on Generation 2 Hyper-V Hosts.    On a random Basis, the file system
  will be mounted Read-Only due to a "disk error" (which really isn't
  the case here).    As a result, they must reboot the Ubuntu guest to
  get the file system to mount RW again.

  The Error seen are the following:
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968142] storvsc: Sense Key : Unit Attention [current] 
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968145] storvsc: Add. Sense: Changed operating definition
  Apr 30 00:02:01 balticnetworkstraining kernel: [640153.968161] sd 0:0:0:0: Warning! Received an indication that the operating parameters on this target have changed. The Linux SCSI layer does not automatically adjust these parameters.
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584164] hv_storvsc vmbus_0_4: cmd 0x2a scsi status 0x2 srb status 0x82
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584178] hv_storvsc vmbus_0_4: stor pkt ffff88006eb6c700 autosense data valid - len 18
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584180] storvsc: Sense Key : Unit Attention [current] 
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584183] storvsc: Add. Sense: Changed operating definition
  Apr 30 01:23:26 balticnetworkstraining kernel: [645039.584198] sd 0:0:0:0: Warning! Received an indication that the operating parameters on this target have changed.  The Linux SCSI layer does not automatically adjust these parameters.

  This relates to the VSS "Windows Server Backup" process that kicks off at midnight on the host and finishes an hour and half later.   
  Yes, we do have hv_vss_daemon and hv_kvp_daemon running for the correct kernel version we have.   We're currently running kernel version 3.13.0-49-generic #83 on one system and 3.16.0-34-generic #37 on the other. -- We see the same errors on both.
  As a result, we've been hesitant to drop any more ubuntu guests on our 2012R2 hyper-v system because of this.   We can stop the backup process and all is good, but we need nightly backups to image all of our VM's.   All the windows guests have no issues of course.   We also have some CentOS based guests running without issues from what we've seen.

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