Hi,

Was only running for a few days - I am concerned that we have seen iscsi_trgt:conn_close+0x26/0x97 issue before.

Does anyone have any idea why this happens, or what I could do to prevent it?

I will note that we have a lot of connections, such as 670 on one node - we are working on reducing that - but before doing that, can some give me  a clue as to what to look for?

Thank you.

Steffen

Jan  5 16:25:01 iscsi-target4-node2 kernel: BUG: soft lockup - CPU#5 stuck for 60s! [istd9:13929]
Jan  5 16:25:01 iscsi-target4-node2 kernel: CPU 5:
Jan  5 16:25:01 iscsi-target4-node2 kernel: Modules linked in: iscsi_trgt(U) netconsole autofs4 ip_conntrack_netbios_ns ipt_REJECT xt_tcpudp xt_state ip_conntrack nfnetlink iptable_filter ip_tables x_tables dm_round_robin dm_multipath scsi_dh video backlight sbs power_meter hwmon i2c_ec i2c_core dell_wmi wmi button battery asus_acpi acpi_memhotplug ac parport_pc lp parport joydev sr_mod cdrom sg ixgbe(U) qla2xxx i7core_edac bnx2 tpm_tis edac_mc tpm tpm_bios 8021q scsi_transport_fc serio_raw pcspkr dca dm_raid45 dm_message dm_region_hash dm_mem_cache dm_snapshot dm_zero dm_mirror dm_log dm_mod ata_piix libata shpchp megaraid_sas sd_mod scsi_mod ext3 jbd uhci_hcd ohci_hcd ehci_hcd
Jan  5 16:25:01 iscsi-target4-node2 kernel: Pid: 13929, comm: istd9 Tainted: G     ---- 2.6.18-308.4.1.el5 #1
Jan  5 16:25:01 iscsi-target4-node2 kernel: RIP: 0010:[<ffffffff80064bdf>]  [<ffffffff80064bdf>] .text.lock.spinlock+0x5/0x30
Jan  5 16:25:01 iscsi-target4-node2 kernel: RSP: 0018:ffff8106451f7b88  EFLAGS: 00000286
Jan  5 16:25:01 iscsi-target4-node2 kernel: RAX: 00000000ffffffff RBX: ffff810115bbec00 RCX: 00000000fbfce19a
Jan  5 16:25:01 iscsi-target4-node2 kernel: RDX: ffff810c10c83e68 RSI: ffff810c10c83980 RDI: ffff810c16c46058
Jan  5 16:25:01 iscsi-target4-node2 kernel: RBP: ffff8106451f7b00 R08: 0000000000000003 R09: 00000000fbfce19a
Jan  5 16:25:01 iscsi-target4-node2 kernel: R10: 0000000080000000 R11: 0000000000000014 R12: ffffffff8005dc8e
Jan  5 16:25:01 iscsi-target4-node2 kernel: R13: ffff810c16c46000 R14: ffffffff8007944e R15: ffff8106451f7b00
Jan  5 16:25:01 iscsi-target4-node2 kernel: FS:  0000000000000000(0000) GS:ffff81062fcdae40(0000) knlGS:0000000000000000
Jan  5 16:25:01 iscsi-target4-node2 kernel: CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Jan  5 16:25:01 iscsi-target4-node2 kernel: CR2: 000000000ef82af0 CR3: 0000000000201000 CR4: 00000000000006a0
Jan  5 16:25:01 iscsi-target4-node2 kernel:
Jan  5 16:25:01 iscsi-target4-node2 kernel: Call Trace:
Jan  5 16:25:01 iscsi-target4-node2 kernel:  <IRQ>  [<ffffffff885c5042>] :iscsi_trgt:conn_close+0x26/0x97
Jan  5 16:25:01 iscsi-target4-node2 kernel:  [<ffffffff885c538f>] :iscsi_trgt:iet_state_change+0x24/0x3e
Jan  5 16:25:01 iscsi-target4-node2 kernel:  [<ffffffff800541df>] tcp_fin+0x19c/0x1ec
Jan  5 16:25:01 iscsi-target4-node2 kernel:  [<ffffffff8003604c>] tcp_data_queue+0x2bd/0xab5
Jan  5 16:25:01 iscsi-target4-node2 kernel:  [<ffffffff8001c02c>] tcp_rcv_established+0x7f5/0x8bd
Jan  5 16:25:01 iscsi-target4-node2 kernel:  [<ffffffff8003b3ae>] tcp_v4_do_rcv+0x2a/0x2fa


_______________________________________________________________________________________________
Steffen Plotner                            Amherst College            Tel (413) 542-2348
Systems/Network Administrator/Programmer   PO BOX 5000                Fax (413) 542-2626
Systems & Networking                       Amherst, MA 01002-5000     swplotner@amherst.edu