[Xen-users] XEN-4.4 BUG: Kernel paging request

[Wolf Grossi <wg@xxxxxxxxxxxxxx>]

Greetings!

This are 2 XEN-4.4.4_02-43.1, MAGRO-XEN and MAGRO-XEN1, each running on
opensuse-13.2.
Both machines are configured identically, MAGRO-XEN1 is used as backup.

Since changing to opensuse-13.2/XEN-4.4 I get dom0 hangs on MAGRO-XEN,
sometimes after 3, sometimes after 10 days.

Today I checked net performance.

On MAGRO-XEN dom0 I run iperf(client) to MAGRO-XEN1 dom0 iperf(server).
The machines are connected with a 1GBit line and I saw values as
expected. Everything was ok.


Then I started iperf(server) on MAGRO-XEN1 domU MAGRO8 and iperf(client)
on MAGRO-XEN1 dom0.

Only after a few messages the system hung!

This error is repeatable on both machines!

Below is the logfile (journalctl -f) showing the BUG, and MAGRO8.xml

What can I do to solve the issue?


Any hints would be very much appreciated.

Wolf



--- logfile ---
May 14 17:15:01 MAGRO-XEN1 systemd[1]: Starting Session 23 of user root.
May 14 17:15:01 MAGRO-XEN1 systemd[1]: Started Session 23 of user root.
May 14 17:26:51 MAGRO-XEN1 kernel: BUG: unable to handle kernel paging
request at ffffc9000413f022
May 14 17:26:51 MAGRO-XEN1 kernel: IP: [<ffffffffa0473b2b>]
netbk_gop_frag+0x24b/0x2a0 [netbk]
May 14 17:26:52 MAGRO-XEN1 kernel: PGD 16604c067 PUD 16604d067 PMD
166387067 PTE 0
May 14 17:26:52 MAGRO-XEN1 kernel: Oops: 0002 [#1] SMP
May 14 17:26:52 MAGRO-XEN1 kernel: Modules linked in: binfmt_misc fuse
bnep bluetooth 6lowpan_iphc rfkill xt_pkttype xt_physdev xt_TCPMSS
xt_LOG xt_limit af_packet bridge stp llc iscsi_ibft iscsi_boot_sysfs nbd
xenblk ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6
ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle
blktap nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4
blktap2 nf_defrag_ipv4 ip_tables pciback xt_conntrack nf_conntrack usbbk
ip6table_filter ip6_tables x_tables xen_scsibk blkbk blkback_pagemap
netbk xenbus_be gntdev evtchn hid_generic usbhid ppdev
snd_hda_codec_hdmi gpio_ich iTCO_wdt iTCO_vendor_support 8250
snd_hda_intel serial_core snd_hda_controller snd_hda_codec parport_pc
parport snd_hwdep snd_pcm snd_timer snd soundcore processor serio_raw
8139too 8139cp
May 14 17:26:52 MAGRO-XEN1 kernel:  r8169 i2c_i801 mii thermal_sys
lpc_ich mfd_core pcspkr shpchp button coretemp domctl sr_mod cdrom
ata_generic ata_piix firewire_ohci ehci_pci radeon uhci_hcd pata_via
ehci_hcd hwmon i2c_algo_bit firewire_core drm_kms_helper crc_itu_t ttm
drm i2c_core usbcore usb_common dm_mirror dm_region_hash dm_log dm_mod sg
May 14 17:26:52 MAGRO-XEN1 kernel: CPU: 1 PID: 971 Comm: netback/0 Not
tainted 3.16.7-35-xen #1
May 14 17:26:52 MAGRO-XEN1 kernel: Hardware name: To Be Filled By O.E.M.
To Be Filled By O.E.M./P5B-DE, BIOS P1.10 11/04/2009
May 14 17:26:52 MAGRO-XEN1 kernel: task: ffff8800fe418650 ti:
ffff8800f48a0000 task.ti: ffff8800f48a0000
May 14 17:26:52 MAGRO-XEN1 kernel: RIP: e030:[<ffffffffa0473b2b>]
[<ffffffffa0473b2b>] netbk_gop_frag+0x24b/0x2a0 [netbk]
May 14 17:26:52 MAGRO-XEN1 kernel: RSP: e02b:ffff8800f48a3d10  EFLAGS:
00010282
May 14 17:26:52 MAGRO-XEN1 kernel: RAX: 0000000000000002 RBX:
ffff8800fb35c8c0 RCX: ffff8800f48a3de8
May 14 17:26:52 MAGRO-XEN1 kernel: RDX: 000000000000000d RSI:
ffff88016f0db0d0 RDI: 00000000000012b9
May 14 17:26:52 MAGRO-XEN1 kernel: RBP: ffffc900040e8450 R08:
ffff88016f0db0d0 R09: 0000000000000000
May 14 17:26:52 MAGRO-XEN1 kernel: R10: 0000000000000003 R11:
0000000000000011 R12: ffffc9000413daa8
May 14 17:26:52 MAGRO-XEN1 kernel: R13: ffffc9000413f000 R14:
0000000000002000 R15: 000000000000000d
May 14 17:26:52 MAGRO-XEN1 kernel: FS:  00007f7040082700(0000)
GS:ffff88016c900000(0000) knlGS:0000000000000000
May 14 17:26:52 MAGRO-XEN1 kernel: CS:  e033 DS: 0000 ES: 0000 CR0:
000000008005003b
May 14 17:26:52 MAGRO-XEN1 kernel: CR2: ffffc9000413f022 CR3:
0000000132c5c000 CR4: 0000000000000660
May 14 17:26:52 MAGRO-XEN1 kernel: Stack:
May 14 17:26:52 MAGRO-XEN1 kernel:  000000000000000d ffffc9000413daa8
0000000000000000 0000000000002000
May 14 17:26:52 MAGRO-XEN1 kernel:  0000000000000000 ffffffffa0474057
ffff880000000000 0000000000000000
May 14 17:26:52 MAGRO-XEN1 kernel:  ffff88016f0db0d0 ffff8800fb35c8c0
0000000000000001 ffff8801423584e8
May 14 17:26:52 MAGRO-XEN1 kernel: Call Trace:
May 14 17:26:52 MAGRO-XEN1 kernel:  [<ffffffffa0474057>]
net_rx_action+0x4d7/0x1150 [netbk]
May 14 17:26:52 MAGRO-XEN1 kernel:  [<ffffffffa04775c3>]
netbk_action_thread+0x63/0x230 [netbk]
May 14 17:26:52 MAGRO-XEN1 kernel:  [<ffffffff8005a69d>] kthread+0xbd/0xe0
May 14 17:26:52 MAGRO-XEN1 kernel:  [<ffffffff805778e0>]
ret_from_fork+0x60/0x90
May 14 17:26:52 MAGRO-XEN1 kernel: Code: 41 80 44 24 12 01 44 89 4c 24
04 8b 41 18 48 8b 71 38 89 14 24 8d 78 01 48 8d 04 80 4c 8d 2c c6 b8 02
00 00 00 89 79 18 4c 89 c6 <66> 41 89 45 22 4c 89 ef e8 f8 f7 ff ff 8b
44 24 30 8b 14 24 44
May 14 17:26:52 MAGRO-XEN1 kernel: RIP  [<ffffffffa0473b2b>]
netbk_gop_frag+0x24b/0x2a0 [netbk]
May 14 17:26:52 MAGRO-XEN1 kernel:  RSP <ffff8800f48a3d10>
May 14 17:26:52 MAGRO-XEN1 kernel: CR2: ffffc9000413f022
May 14 17:26:52 MAGRO-XEN1 kernel: ---[ end trace e6670f7e27a58b82 ]---
--- end logfile ---

--- MAGRO8-.xml ---
<!--
WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
OVERWRITTEN AND LOST. Changes to this xml configuration should be made
using:
  virsh edit MAGRO8
or other application using the libvirt API.
-->

<domain type='xen'>
  <name>MAGRO8</name>
  <uuid>fe551720-1637-8123-d82e-3497fa62488d</uuid>
  <description>MAGRO8-openSUSE-11.3</description>
  <memory unit='KiB'>1048576</memory>
  <currentMemory unit='KiB'>1048576</currentMemory>
  <vcpu placement='static'>2</vcpu>
  <bootloader>pygrub</bootloader>

<bootloader_args>--entry=xvda2:/boot/vmlinuz-xen,/boot/initrd-xen</bootloader_args>
  <os>
    <type arch='x86_64' machine='xenpv'>linux</type>
  </os>
  <clock offset='utc'/>
  <on_poweroff>destroy</on_poweroff>
  <on_reboot>restart</on_reboot>
  <on_crash>destroy</on_crash>
  <devices>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/MAGRO8/disk0.raw'/>
      <target dev='xvda' bus='xen'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/openSUSE-11.3-DVD-x86_64.iso'/>
      <target dev='xvdb' bus='xen'/>
    </disk>
    <disk type='file' device='disk'>
      <driver name='qemu' type='raw'/>
      <source file='/var/lib/libvirt/images/openSUSE-11.3-DVD-x86_64.iso'/>
      <target dev='xvdb' bus='xen'/>
    </disk>
    <interface type='bridge'>
      <mac address='00:16:3e:00:01:08'/>
      <source bridge='br0'/>
    </interface>
    <console type='pty'>
      <target type='xen' port='0'/>
    </console>
    <input type='mouse' bus='xen'/>
    <input type='keyboard' bus='xen'/>
    <graphics type='vnc' port='-1' autoport='yes' keymap='de'/>
    <video>
      <model type='xen' vram='4096' heads='1'/>
    </video>
  </devices>
</domain>
--- end MAGRO8.xml ---



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