Exadata X6-2 Server Panic "load_balance+0xb2/0x490"

(Doc ID 2330063.1)

Last updated on DECEMBER 03, 2017

Applies to:

Linux OS - Version Oracle Linux 6.0 with Unbreakable Enterprise Kernel [2.6.32] and later
Linux x86-64

Symptoms

ORACLE SERVER X6-2 crashed with

BUG: unable to handle kernel NULL pointer dereference at (null)
IP: [<ffffffff81065432>] load_balance+0xb2/0x490
PGD 211c330067 PUD 2367667067 PMD 0
Oops: 0000 [#1] SMP
CPU 44
Modules linked in: oracleacfs(P)(U) oracleadvm(P)(U) oracleoks(P)(U) mpt2sas scsi_transport_sas raid_class ipmi_poweroff ipmi_devintf ipmi_si ipmi_msghandler bonding acpi_cpufreq freq_table mperf rds_rdma rds ib_ipoib rdma_ucm ib_ucm ib_uverbs ib_umad mlx4_ib mlx4_core dm_multipath be2iscsi iscsi_boot_sysfs bnx2i cnic uio cxgb4i cxgb4 cxgb3i libcxgbi cxgb3 mdio ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi_tcp libiscsi scsi_transport_iscsi ipv6 fuse mxm_wmi wmi ghes hed sg ixgbe hwmon dca ext4 mbcache jbd2 sd_mod crc_t10dif ahci libahci megaraid_sas dm_mirror dm_region_hash dm_log dm_mod [last unloaded: scsi_wait_scan]

Pid: 154989, comm: kworker/u:1 Tainted: P 2.6.39-400.277.1.el6uek.x86_64 #1 Oracle Corporation ORACLE SERVER X6-2/ASM,MOTHERBOARD,1U
RIP: 0010:[<ffffffff81065432>] [<ffffffff81065432>] load_balance+0xb2/0x490
RSP: 0018:ffff882d72bf9b30 EFLAGS: 00010046
RAX: 0000000000000000 RBX: 0000000000011180 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 0000000000000000
RBP: ffff882d72bf9cf0 R08: 0000000000000000 R09: 0000000000000040
R10: 00000000000003ff R11: ffff88207f811228 R12: 0000000000000000
R13: 0000000000000000 R14: ffff881fc1c0b400 R15: 0000000000011100
FS: 0000000000000000(0000) GS:ffff88207fac0000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000000 CR3: 0000002329f7b000 CR4: 00000000001406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Process kworker/u:1 (pid: 154989, threadinfo ffff882d72bf8000, task ffff8828cc4244c0)
Stack:
ffff882d72bf9c80 ffff882d72bf9bd0 0000000000000000 ffff882d72bf9c18
ffff882d72bf9d60 ffff882d72bf9e0c 0000000200206e7d ffff88207f676300
0000000072bf9c00 0000000000011188 0000000000011188 0000002c0000ea60
Call Trace:
[<ffffffff8106542a>] load_balance+0xaa/0x490
[<ffffffff8150c2a1>] __schedule+0x801/0x810
[<ffffffff8150c64f>] schedule+0x3f/0x60
[<ffffffff8108bf7e>] worker_thread+0x24e/0x3c0
[<ffffffff8108bd30>] ? manage_workers+0x120/0x120
[<ffffffff810910e6>] kthread+0x96/0xa0
[<ffffffff81517c04>] kernel_thread_helper+0x4/0x10
[<ffffffff81091050>] ? kthread_worker_fn+0x1a0/0x1a0
[<ffffffff81517c00>] ? gs_change+0x13/0x13
Code: ff ff 48 89 85 78 ff ff ff 4c 8b 4d 80 4c 8b 45 b0 48 8d 55 c0 8b 4d ac 8b 75 a8 4c 89 f7 e8 36 67 ff ff 48 8b 55 80 48 89 45 98
8b 12 45 85 d2 0f 84 7d 03 00 00 48 85 c0 0f 84 9b 03 00 00
RIP [<ffffffff81065432>] load_balance+0xb2/0x490
RSP <ffff882d72bf9b30>

Cause

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