My system suddenly frozen after almost 2 years of uninterruptly work with an error quite cryptic.
Is it caused by some pending hardware failure? Or by software?

2015/03/10 09:28:17|[124562.340855] last sysfs file: /sys/devices/system/cpu/cpu11/cache/index2/shared_cpu_map
2015/03/10 09:28:17|[124562.340856] CPU 1
2015/03/10 09:28:17|[124562.340880]
2015/03/10 09:28:17|[124562.340883] Pid: 1369, comm: bE6o07mFzo2_0 Not tainted 2.6.35.14-oe64-00000-ge4ce801 #2 X9SRL-F/X9SRL-F
2015/03/10 09:28:17|[124562.340885] RIP: 0010:[<ffffffff8103e652>] [<ffffffff8103e652>] load_balance+0x662/0x1270
2015/03/10 09:28:17|[124562.340891] RSP: 0000:ffff88014d343c00 EFLAGS: 00010046
2015/03/10 09:28:17|[124562.340893] RAX: 0000000000000000 RBX: 0000000000000080 RCX: 0000000000000000
2015/03/10 09:28:17|[124562.340895] RDX: 0000000000000000 RSI: ffff880001e30180 RDI: 0000000000000080
2015/03/10 09:28:17|[124562.340897] RBP: ffff880001ef4001 R08: 0000000000000080 R09: ffff880001e30260
2015/03/10 09:28:17|[124562.340899] R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffffffff
2015/03/10 09:28:17|[124562.340901] R13: ffffffffffffffff R14: ffff880001e30240 R15: ffff880001e30250
2015/03/10 09:28:17|[124562.340903] FS: 0000000000000000(0000) GS:ffff880001e20000(0000) knlGS:0000000000000000
2015/03/10 09:28:17|[124562.340905] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
2015/03/10 09:28:17|[124562.340907] CR2: 00000000f7774020 CR3: 0000000001917000 CR4: 00000000000406e0
2015/03/10 09:28:17|[124562.340909] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
2015/03/10 09:28:17|[124562.340911] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
2015/03/10 09:28:17|[124562.340914] Process bE6o07mFzo2_0 (pid: 1369, threadinfo ffff88014d342000, task ffff8801d7680000)
2015/03/10 09:28:17|[124562.340915] Stack:
2015/03/10 09:28:17|[124562.340916] ffff8801fc783000 ffff88014d343d80 000000001caa6e18 000000000000024d
2015/03/10 09:28:17|[124562.340919] <0> 0000000000014000 0000000000014000 ffff8801fb8ed5f0 ffff88014d343e34
2015/03/10 09:28:17|[124562.340922] <0> 00000002fc783000 ffff880001e301a0 ffff880001e34000 0000000000000001
2015/03/10 09:28:17|[124562.340926] Call Trace:
2015/03/10 09:28:17|[124562.340931] [<ffffffff8103cd21>] ? dequeue_task+0x61/0xa0
2015/03/10 09:28:17|[124562.340934] [<ffffffff81590be1>] ? schedule+0x431/0x5c0
2015/03/10 09:28:17|[124562.340946] [<ffffffffa01d1456>] ? scst_cmd_thread+0x196/0x2b0 [scst]
2015/03/10 09:28:17|[124562.340949] [<ffffffff8103da70>] ? default_wake_function+0x0/0x10
2015/03/10 09:28:17|[124562.340957] [<ffffffffa01d12c0>] ? scst_cmd_thread+0x0/0x2b0 [scst]
2015/03/10 09:28:17|[124562.340961] [<ffffffff8105c4b6>] ? kthread+0x96/0xa0
2015/03/10 09:28:17|[124562.340966] [<ffffffff8100aa64>] ? kernel_thread_helper+0x4/0x10
2015/03/10 09:28:17|[124562.340968] [<ffffffff8105c420>] ? kthread+0x0/0xa0
2015/03/10 09:28:17|[124562.340972] [<ffffffff8100aa60>] ? kernel_thread_helper+0x0/0x10
2015/03/10 09:28:17|[124562.340973] Code: 48 8b 12 48 01 c1 48 39 f2 75 f2 48 8b 94 24 a0 00 00 00 89 4a 08 41 8b 56 08 48 8b 84 24 88 01 00 00 48 c1 e0 0a 48 89 d1 31 d2 <48> f7 f1 48 8b 94 24 90 01 00 00 48 89 84 24 80 01 00 00 31 c0
2015/03/10 09:28:17|[124562.341000] RSP <ffff88014d343c00>
2015/03/10 09:28:17|[124562.440460] PGD 1918063 PUD 80000001c00001e3
2015/03/10 09:28:17|[124562.440465] last sysfs file: /sys/devices/system/cpu/cpu11/cache/index2/shared_cpu_map
2015/03/10 09:28:17|[124562.440467] CPU 0
2015/03/10 09:28:17|[124562.440489]
2015/03/10 09:28:17|[124562.440491] Pid: 21163, comm: iscsird5 Tainted: G D 2.6.35.14-oe64-00000-ge4ce801 #2 X9SRL-F/X9SRL-F
2015/03/10 09:28:17|[124562.440494] RIP: 0010:[<ffff8801d76f59d4>] [<ffff8801d76f59d4>] 0xffff8801d76f59d4
2015/03/10 09:28:17|[124562.440497] RSP: 0000:ffff8801d77b9d98 EFLAGS: 00010002
2015/03/10 09:28:17|[124562.440499] RAX: ffff88014d343e98 RBX: ffff8801fb86ec68 RCX: 0000000000000000
2015/03/10 09:28:17|[124562.440501] RDX: 0000000000000000 RSI: 0000000000000003 RDI: ffff88014d343e80
2015/03/10 09:28:17|[124562.440503] RBP: 000000008105055f R08: ffff88014d343e80 R09: 0000000000004000
2015/03/10 09:28:17|[124562.440505] R10: ffffffff819acc00 R11: 0000000000000000 R12: 0000000000000001
2015/03/10 09:28:17|[124562.440506] R13: ffff88014cf65088 R14: 0000000000000000 R15: 0000000000000000
2015/03/10 09:28:17|[124562.440509] FS: 0000000000000000(0000) GS:ffff880001e00000(0000) knlGS:0000000000000000
2015/03/10 09:28:17|[124562.440511] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
2015/03/10 09:28:17|[124562.440513] CR2: ffff8801d76f59d4 CR3: 0000000001917000 CR4: 00000000000406f0
2015/03/10 09:28:17|[124562.440515] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
2015/03/10 09:28:17|[124562.440517] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
2015/03/10 09:28:17|[124562.440519] Process iscsird5 (pid: 21163, threadinfo ffff8801d77b8000, task ffff8801f9f71110)
2015/03/10 09:28:17|[124562.440521] Stack:
2015/03/10 09:28:17|[124562.440522] ffffffff81038d6b 0000000300000000 ffff88014cf65080 ffff8801d56f4ac8
2015/03/10 09:28:17|[124562.440525] <0> 0000000000000000 0000000000000001 0000000000000086 0000000000000003
2015/03/10 09:28:17|[124562.440528] <0> ffffffff81040d93 0000000000000286 0000000000000000 ffff880145213080
2015/03/10 09:28:17|[124562.440531] Call Trace:
2015/03/10 09:28:17|[124562.440536] [<ffffffff81038d6b>] ? __wake_up_common+0x5b/0x90
2015/03/10 09:28:17|[124562.440540] [<ffffffff81040d93>] ? __wake_up+0x43/0x70
2015/03/10 09:28:17|[124562.440552] [<ffffffffa01cfaa9>] ? scst_process_redirect_cmd+0xd9/0x1f0 [scst]
2015/03/10 09:28:17|[124562.440557] [<ffffffffa0268db5>] ? cmnd_rx_end+0x265/0x410 [iscsi_scst]
2015/03/10 09:28:17|[124562.440561] [<ffffffffa026b333>] ? istrd+0x5e3/0x870 [iscsi_scst]
2015/03/10 09:28:17|[124562.440565] [<ffffffff8103da70>] ? default_wake_function+0x0/0x10
2015/03/10 09:28:17|[124562.440568] [<ffffffffa026ad50>] ? istrd+0x0/0x870 [iscsi_scst]
2015/03/10 09:28:17|[124562.440572] [<ffffffff8105c4b6>] ? kthread+0x96/0xa0
2015/03/10 09:28:17|[124562.440577] [<ffffffff8100aa64>] ? kernel_thread_helper+0x4/0x10
2015/03/10 09:28:17|[124562.440579] [<ffffffff8105c420>] ? kthread+0x0/0xa0
2015/03/10 09:28:17|[124562.440582] [<ffffffff8100aa60>] ? kernel_thread_helper+0x0/0x10
2015/03/10 09:28:17|[124562.440584] Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff ff ff ff ff ff ff ff 00 00 00 00 0e 00 00 00 0e 00 00 00 <04> 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 e8
2015/03/10 09:28:17|[124562.440610] RSP <ffff8801d77b9d98>
2015/03/10 09:28:17|[124562.440611] CR2: ffff8801d76f59d4

Thank in advance.
Federico M.