Re: [Xen-users] Spontaneous reboots stock Xen 4.4 on Debian Jessie - solved

[Jan Bakuwel <jan.bakuwel@xxxxxxxxx>]

Hi all,

Many thanks to Andreas for suggesting to use netconsole; this helped me
to get a handle on the problem. I had configured both servers to use a
bonded interface over two Broadcom NetXtreme BCM5720 Gigabit Ethernet
NICs. After using a single interface instead of the bonded interface, I
no longer had spontaneous server reboots ... well so far that is :-)

For those interested, kernel panic details below.

cheers,
Jan

[  384.288327] BUG: unable to handle kernel paging request at
ffff8800acc5ad40
[  384.288621] IP: [<ffffffff812ba4a6>] memcpy+0x6/0x110
[  384.288778] PGD 1814067 PUD 132689067 PMD 132522067 PTE 0
[  384.289120] Oops: 0000 [#1] SMP
[  384.289333] Modules linked in: xt_tcpudp tun xt_physdev
iptable_filter ip_tables x_tables xen_netback xen_blkback netconsole
configfs xen_gntdev xen_evtchn xenfs xen_privcmd nfsd auth_rpcgss
oid_registry nfs_acl nfs lockd fscache sunrpc bonding 8021q garp mrp
bridge stp llc x86_pkg_temp_thermal intel_powerclamp coretemp
crc32_pclmul joydev ipmi_devintf iTCO_wdt aesni_intel aes_x86_64 ttm
drm_kms_helper drm acpi_power_meter evdev pcspkr lrw gf128mul ipmi_si
iTCO_vendor_support sb_edac shpchp edac_core mei_me dcdbas lpc_ich
mfd_core glue_helper ablk_helper ipmi_msghandler cryptd tpm_tis tpm mei
button wmi processor thermal_sys drbd lru_cache libcrc32c crc32c_generic
autofs4 hid_generic usbhid hid ext4 crc16 mbcache jbd2 dm_mod sg sd_mod
sr_mod crc_t10dif cdrom crct10dif_generic crct10dif_pclmul
crct10dif_common crc32c_intel ahci libahci igb ehci_pci i2c_algo_bit
ehci_hcd libata i2c_core tg3 dca ptp pps_core megaraid_sas usbcore
libphy usb_common scsi_mod [last unloaded: netconsole]
[  384.298002] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.16.0-4-amd64
#1 Debian 3.16.36-1+deb8u2
[  384.298132] Hardware name: Dell Inc. PowerEdge T420/061VPC, BIOS
2.4.2 01/29/2015
[  384.298258] task: ffffffff8181a460 ti: ffffffff81800000 task.ti:
ffffffff81800000
[  384.298384] RIP: e030:[<ffffffff812ba4a6>]  [<ffffffff812ba4a6>]
memcpy+0x6/0x110
[  384.298574] RSP: e02b:ffff880131603d30  EFLAGS: 00010282
[  384.298673] RAX: ffff8800a9d60130 RBX: 00000000000005a8 RCX:
00000000000002c0
[  384.298776] RDX: 00000000000002c0 RSI: ffff8800acc5ad40 RDI:
ffff8800a9d60130
[  384.298879] RBP: 0000000000000042 R08: ffff8800a9d60130 R09:
00000000000002c0
[  384.298982] R10: ffff8800aa3666e8 R11: 00000000000002c0 R12:
0000000000000000
[  384.299084] R13: 0000000000000302 R14: 0000000000000042 R15:
ffff8800aa3666e8
[  384.299190] FS:  0000000000000000(0000) GS:ffff880131600000(0000)
knlGS:ffff880131600000
[  384.299317] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[  384.299416] CR2: ffff8800acc5ad40 CR3: 0000000001813000 CR4:
0000000000042660
[  384.299519] Stack:
[  384.299609]  ffffffff81410d8f ffff8800000002c0 00000000000002c0
0000030224fc0b20
[  384.299985]  ffff8800aa3666e8 ffff8800c5b23c00 00000000000000ee
ffff880124fc08c0
[  384.300361]  ffff8800aa3666e8 ffff880124fc09c0 ffffffff814126f7
ffff880124fc0000
[  384.300738] Call Trace:
[  384.300829]  <IRQ>
[  384.300897]  [<ffffffff81410d8f>] ? skb_copy_bits+0x13f/0x280
[  384.301149]  [<ffffffff814126f7>] ? skb_copy+0x77/0xa0
[  384.301253]  [<ffffffffa016c9d5>] ? tg3_start_xmit+0xb55/0xd80 [tg3]
[  384.301356]  [<ffffffff81424507>] ? dev_hard_start_xmit+0x2e7/0x610
[  384.301459]  [<ffffffff813946ad>] ? add_interrupt_randomness+0x3d/0x1f0
[  384.301564]  [<ffffffff81444a59>] ? sch_direct_xmit+0xc9/0x1a0
[  384.301665]  [<ffffffff81444bb9>] ? __qdisc_run+0x89/0x140
[  384.301764]  [<ffffffff81421e2d>] ? net_tx_action+0x16d/0x250
[  384.301865]  [<ffffffff8106d8d1>] ? __do_softirq+0xf1/0x2d0
[  384.301965]  [<ffffffff8106dce5>] ? irq_exit+0x95/0xa0
[  384.302064]  [<ffffffff8135cc15>] ? xen_evtchn_do_upcall+0x35/0x50
[  384.302165]  [<ffffffff8151a21e>] ? xen_do_hypervisor_callback+0x1e/0x30
[  384.302266]  <EOI>
[  384.302334]  [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[  384.302585]  [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
[  384.302721]  [<ffffffff8100ad3c>] ? xen_safe_halt+0xc/0x20
[  384.302821]  [<ffffffff8101da39>] ? default_idle+0x19/0xd0
[  384.302921]  [<ffffffff810a9b44>] ? cpu_startup_entry+0x374/0x470
[  384.303035]  [<ffffffff81903076>] ? start_kernel+0x497/0x4a2
[  384.303135]  [<ffffffff81902a04>] ? set_init_arg+0x4e/0x4e
[  384.303234]  [<ffffffff81904f91>] ? xen_start_kernel+0x569/0x573
[  384.303334] Code: 43 50 88 43 4e 5b c3 66 0f 1f 44 00 00 e8 03 fc ff
ff 48 8b 43 58 48 2b 43 50 88 43 4e eb e6 90 90 90 90 90 90 48 89 f8 48
89 d1 <f3> a4 c3 03 83 e2 07 f3 48 a5 89 d1 f3 a4 c3 20 4c 8b 06 4c 8b
[  384.307812] RIP  [<ffffffff812ba4a6>] memcpy+0x6/0x110
[  384.307997]  RSP <ffff880131603d30>
[  384.308102] CR2: ffff8800acc5ad40
[  384.308197] ---[ end trace 5caf06846f91249a ]---
[  384.311778] Kernel panic - not syncing: Fatal exception in interrupt
[  384.311914] Kernel Offset: 0x0 from 0xffffffff81000000 (relocation
range: 0xffffffff80000000-0xffffffff9fffffff)


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