Comment 28 for bug 1056746

The same issue happens for me with the linux-image-server:

Dec 7 12:04:24 node1 multipathd: sdc: remove path (uevent)
Dec 7 12:04:24 node1 kernel: [65815.457105] sd 1:0:0:1: [sdc] Synchronizing SCSI cache
Dec 7 12:04:24 node1 kernel: [65815.458094] sd 1:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
Dec 7 12:04:24 node1 kernel: [65815.458101] sd 1:0:0:1: [sdc] Sense Key : Illegal Request [current]
Dec 7 12:04:24 node1 kernel: [65815.458106] sd 1:0:0:1: [sdc] Add. Sense: Logical unit not supported
Dec 7 12:04:48 node1 kernel: [65839.483571] BUG: soft lockup - CPU#10 stuck for 22s! [kworker/u:1:8014]
Dec 7 12:04:48 node1 kernel: [65839.486057] Modules linked in: dm_snapshot ipt_LOG ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vesafb xfs joydev i7core_edac edac_core ioatdma bridge stp tpm_tis mac_hid lp parport dm_round_robin usbhid hid mptsas mptscsih mptbase igb scsi_transport_sas dca dm_multipath [last unloaded: scsi_wait_scan]
Dec 7 12:04:48 node1 kernel: [65839.486109] CPU 10
Dec 7 12:04:48 node1 kernel: [65839.486110] Modules linked in: dm_snapshot ipt_LOG ip6table_filter ip6_tables ebtable_nat ebtables ipt_MASQUERADE iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack ipt_REJECT xt_CHECKSUM iptable_mangle xt_tcpudp iptable_filter ip_tables x_tables kvm_intel kvm ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi vesafb xfs joydev i7core_edac edac_core ioatdma bridge stp tpm_tis mac_hid lp parport dm_round_robin usbhid hid mptsas mptscsih mptbase igb scsi_transport_sas dca dm_multipath [last unloaded: scsi_wait_scan]
Dec 7 12:04:48 node1 kernel: [65839.486151]
Dec 7 12:04:48 node1 kernel: [65839.486154] Pid: 8014, comm: kworker/u:1 Not tainted 3.2.0-32-generic #51-Ubuntu INTEL MFS5520VI Compute Module/MFS5520VI Compute Module
Dec 7 12:04:48 node1 kernel: [65839.486160] RIP: 0010:[<ffffffff8165b049>] [<ffffffff8165b049>] _raw_spin_unlock_irqrestore+0x19/0x30
Dec 7 12:04:48 node1 kernel: [65839.486170] RSP: 0018:ffff880c44a73d98 EFLAGS: 00000286
Dec 7 12:04:48 node1 kernel: [65839.486172] RAX: 0000000000000286 RBX: 0000000000000018 RCX: 0000000000000018
Dec 7 12:04:48 node1 kernel: [65839.486175] RDX: ffff8806433e0408 RSI: 0000000000000286 RDI: 0000000000000286
Dec 7 12:04:48 node1 kernel: [65839.486178] RBP: ffff880c44a73da0 R08: ffffffff81cddaa0 R09: 0000000000000100
Dec 7 12:04:48 node1 kernel: [65839.486181] R10: 0000000000000018 R11: 0000000000000001 R12: ffffffff81cddaa0
Dec 7 12:04:48 node1 kernel: [65839.486183] R13: 0000000000000100 R14: 0000000000000018 R15: 0000000000000001
Dec 7 12:04:48 node1 kernel: [65839.486187] FS: 0000000000000000(0000) GS:ffff880657ca0000(0000) knlGS:0000000000000000
Dec 7 12:04:48 node1 kernel: [65839.486190] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
Dec 7 12:04:48 node1 kernel: [65839.486193] CR2: 00007f84ebb226c0 CR3: 0000000001c05000 CR4: 00000000000006e0
Dec 7 12:04:48 node1 kernel: [65839.486196] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 7 12:04:48 node1 kernel: [65839.486199] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 7 12:04:48 node1 kernel: [65839.486202] Process kworker/u:1 (pid: 8014, threadinfo ffff880c44a72000, task ffff880c4620ae00)
Dec 7 12:04:48 node1 kernel: [65839.486204] Stack:
Dec 7 12:04:48 node1 kernel: [65839.488879] ffff880c4541a930 ffff880c44a73dd0 ffffffff8142f834 ffff880c4541a930
Dec 7 12:04:48 node1 kernel: [65839.488886] ffff880c4541a800 ffff880c4541a818 0000000000000000 ffff880c44a73e00
Dec 7 12:04:48 node1 kernel: [65839.488891] ffffffffa01ebfec ffff880c4541a880 ffff880c46033b00 ffff880644bf6c00
Dec 7 12:04:48 node1 kernel: [65839.488897] Call Trace:
Dec 7 12:04:48 node1 kernel: [65839.491725] [<ffffffff8142f834>] scsi_remove_target+0xb4/0xe0
Dec 7 12:04:48 node1 kernel: [65839.491736] [<ffffffffa01ebfec>] __iscsi_unbind_session+0xbc/0x190 [scsi_transport_iscsi]
Dec 7 12:04:48 node1 kernel: [65839.491743] [<ffffffff81084b1a>] process_one_work+0x11a/0x480
Dec 7 12:04:48 node1 kernel: [65839.491748] [<ffffffff810858c4>] worker_thread+0x164/0x370
Dec 7 12:04:48 node1 kernel: [65839.491753] [<ffffffff81085760>] ? manage_workers.isra.30+0x130/0x130
Dec 7 12:04:48 node1 kernel: [65839.491758] [<ffffffff8108a0dc>] kthread+0x8c/0xa0
Dec 7 12:04:48 node1 kernel: [65839.491764] [<ffffffff816655b4>] kernel_thread_helper+0x4/0x10
Dec 7 12:04:48 node1 kernel: [65839.491769] [<ffffffff8108a050>] ? flush_kthread_worker+0xa0/0xa0
Dec 7 12:04:48 node1 kernel: [65839.491773] [<ffffffff816655b0>] ? gs_change+0x13/0x13

This kernel is running here:

root@node1:~# dpkg -s linux-image-server
Package: linux-image-server
Status: install ok installed
Priority: optional
Section: metapackages
Installed-Size: 31
Maintainer: Ubuntu Kernel Team <email address hidden>
Architecture: amd64
Source: linux-meta
Version: 3.2.0.34.37
Depends: linux-image-3.2.0-34-generic, linux-firmware
Description: Linux kernel image on Server Equipment.
 This package will always depend on the latest kernel image available
 for Server Equipment.