This problem is wreaking havoc on our servers using iSCSI+Multipath. [847112.700047] BUG: soft lockup - CPU#7 stuck for 23s! [kworker/u:4:8911] [847112.703572] Modules linked in: 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 scsi_dh_emc ext2 ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bridge 8021q garp stp bonding dm_round_robin i5000_edac joydev edac_core i5k_amb radeon ioatdma dca lp ttm drm_kms_helper shpchp parport drm i2c_algo_bit mac_hid psmouse serio_raw dcdbas dm_multipath usbhid hid uas usb_storage mptsas mptscsih mptbase scsi_transport_sas bnx2 [847112.703627] CPU 7 [847112.703628] Modules linked in: 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 scsi_dh_emc ext2 ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi bridge 8021q garp stp bonding dm_round_robin i5000_edac joydev edac_core i5k_amb radeon ioatdma dca lp ttm drm_kms_helper shpchp parport drm i2c_algo_bit mac_hid psmouse serio_raw dcdbas dm_multipath usbhid hid uas usb_storage mptsas mptscsih mptbase scsi_transport_sas bnx2 [847112.703671] [847112.703674] Pid: 8911, comm: kworker/u:4 Not tainted 3.2.0-32-generic #51-Ubuntu Dell Inc. PowerEdge M600/0MY736 [847112.703679] RIP: 0010:[<ffffffff8165b049>] [<ffffffff8165b049>] _raw_spin_unlock_irqrestore+0x19/0x30 [847112.703689] RSP: 0018:ffff880045fe1d98 EFLAGS: 00000286 [847112.703691] RAX: 0000000000000286 RBX: 0000000000000008 RCX: 0000000000000008 [847112.703694] RDX: ffff8801341e8808 RSI: 0000000000000286 RDI: 0000000000000286 [847112.703696] RBP: ffff880045fe1da0 R08: ffffffff81cddaa0 R09: 0000000000000100 [847112.703699] R10: 0000000000000008 R11: 0000000000000001 R12: ffffffff81cddaa0 [847112.703701] R13: 0000000000000100 R14: 0000000000000008 R15: 0000000000000001 [847112.703704] FS: 0000000000000000(0000) GS:ffff88013fdc0000(0000) knlGS:0000000000000000 [847112.703707] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [847112.703709] CR2: 00007f2c5737dc62 CR3: 0000000001c05000 CR4: 00000000000026e0 [847112.703712] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [847112.703714] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [847112.703717] Process kworker/u:4 (pid: 8911, threadinfo ffff880045fe0000, task ffff88013523dc00) [847112.703719] Stack: [847112.704002] ffff88012b088930 ffff880045fe1dd0 ffffffff8142f834 ffff88012b088930 [847112.704002] ffff88012b088800 ffff88012b088818 0000000000000000 ffff880045fe1e00 [847112.704002] ffffffffa02aefec ffff88012b088880 ffff88009374a900 ffff88012b6c6000 [847112.704002] Call Trace: [847112.704002] [<ffffffff8142f834>] scsi_remove_target+0xb4/0xe0 [847112.704002] [<ffffffffa02aefec>] __iscsi_unbind_session+0xbc/0x190 [scsi_transport_iscsi] [847112.704002] [<ffffffff81084b1a>] process_one_work+0x11a/0x480 [847112.704002] [<ffffffff810858c4>] worker_thread+0x164/0x370 [847112.704002] [<ffffffff81085760>] ? manage_workers.isra.30+0x130/0x130 [847112.704002] [<ffffffff8108a0dc>] kthread+0x8c/0xa0 [847112.704002] [<ffffffff816655b4>] kernel_thread_helper+0x4/0x10 [847112.704002] [<ffffffff8108a050>] ? flush_kthread_worker+0xa0/0xa0 [847112.704002] [<ffffffff816655b0>] ? gs_change+0x13/0x13 [847112.704002] Code: 48 8b 5d f0 4c 8b 65 f8 c9 c3 0f 1f 84 00 00 00 00 00 55 48 89 e5 53 66 66 66 66 90 48 89 f3 e8 5e 2c 9e ff 66 90 48 89 df 57 9d <66> 66 90 66 90 5b 5d c3 66 66 66 66 66 66 2e 0f 1f 84 00 00 00 [847112.704002] Call Trace: [847112.704002] [<ffffffff8142f834>] scsi_remove_target+0xb4/0xe0 [847112.704002] [<ffffffffa02aefec>] __iscsi_unbind_session+0xbc/0x190 [scsi_transport_iscsi] [847112.704002] [<ffffffff81084b1a>] process_one_work+0x11a/0x480 [847112.704002] [<ffffffff810858c4>] worker_thread+0x164/0x370 [847112.704002] [<ffffffff81085760>] ? manage_workers.isra.30+0x130/0x130 [847112.704002] [<ffffffff8108a0dc>] kthread+0x8c/0xa0 [847112.704002] [<ffffffff816655b4>] kernel_thread_helper+0x4/0x10 [847112.704002] [<ffffffff8108a050>] ? flush_kthread_worker+0xa0/0xa0 [847112.704002] [<ffffffff816655b0>] ? gs_change+0x13/0x13
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1049013 Title: SATA hotplug causes I/O stack to freeze To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1049013/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
