[Xen-users] Kernel Bug

[Pedro Rafael Alves Simoes <pedro.a.simoes@xxxxxxxxx>]

Hello,

I have a Debian Etch host machine with Xen Hypervisor 3.0.3 PAE and
Xen kernel 2.6.18. The machine is a Dell with Intel Xeon dual core and
4gb of RAM. This is my xm list:

Name                                      ID Mem(MiB) VCPUs State   Time(s)
Domain-0                                   0      256     2 r-----     36.0
fe-backup                                  2      768     2 -b----     45.8

After doing xm create -c /etc/xen/guest2 with confile:

kernel = "/boot/vmlinuz-2.6.18-5-xen-686"
ramdisk = "/boot/initrd.img-2.6.18-5-xen-686"
memory = 768
name = "esper"
vcpus = 2
#bootloader = '/usr/lib/xen-3.0.3-1/bin/pygrub'
disk = 
['phy:/dev/virtua/be-backup-disk,hda1,w','phy:/dev/virtua/be-backup-swap,hda2,w']
root = "/dev/hda1 ro"
#extra = "4"

# Network
vif = ['mac=00:16:3E:36:78:F0,bridge=xenbr0']
#dhcp = "on"

the host machine dies. After the reboot, I've checked the
/var/log/syslog and saw this output:

Mar 26 15:42:43 xenserver-backup kernel: ------------[ cut here ]------------
Mar 26 15:42:43 xenserver-backup kernel: kernel BUG at
drivers/xen/core/evtchn.c:481!
Mar 26 15:42:43 xenserver-backup kernel: invalid opcode: 0000 [#1]
Mar 26 15:42:43 xenserver-backup kernel: SMP
Mar 26 15:42:43 xenserver-backup kernel: Modules linked in: tun
xt_physdev iptable_filter ip_tables x_tables bridge netloop button ac
battery ipv6 dm_snapshot
 dm_mirror dm_mod sg loop evdev serio_raw shpchp pci_hotplug psmouse
pcspkr serial_core i2c_i801 i2c_core rtc ext3 jbd mbcache sd_mod
ide_cd cdrom generic mpt
sas mptscsih mptbase scsi_transport_sas scsi_mod uhci_hcd tg3 piix
ide_core ehci_hcd usbcore thermal processor fan
Mar 26 15:42:43 xenserver-backup kernel: CPU:    1
Mar 26 15:42:43 xenserver-backup kernel: EIP:    0061:[<c020c3be>]
Not tainted VLI
Mar 26 15:42:43 xenserver-backup kernel: EFLAGS: 00010046
(2.6.18-5-xen-686 #1)
Mar 26 15:42:43 xenserver-backup kernel: EIP is at retrigger+0x1f/0x35
Mar 26 15:42:43 xenserver-backup kernel: eax: 00000000   ebx: 02080000
  ecx: 00000019   edx: f55f6000
Mar 26 15:42:43 xenserver-backup kernel: esi: c0318460   edi: 0000010a
  ebp: 00000000   esp: c039deb0
Mar 26 15:42:43 xenserver-backup kernel: ds: 007b   es: 007b   ss: 0069
Mar 26 15:42:43 xenserver-backup kernel: Process xenwatch (pid: 11,
ti=c039c000 task=c0d9d000 task.ti=c039c000)
Mar 26 15:42:43 xenserver-backup kernel: Stack: c013b225 c0318460
0000010a c0318488 c013af79 cb3caec0 00000000 00000000
Mar 26 15:42:43 xenserver-backup kernel: cb3caec0 c0217364 00000000
c0217744 c02108d3 00000010 00000000 0000020b
Mar 26 15:42:43 xenserver-backup kernel: 0000020a 00000000 00000000
cd32f376 c02e67a4 d12ea000 00000000 00000002
Mar 26 15:42:43 xenserver-backup kernel: Call Trace:
Mar 26 15:42:43 xenserver-backup kernel: [<c013b225>] check_irq_resend+0x41/0x48
Mar 26 15:42:43 xenserver-backup kernel: [<c013af79>] enable_irq+0x72/0x89
Mar 26 15:42:43 xenserver-backup kernel: [<c0217364>] __netif_up+0xb/0x13
Mar 26 15:42:43 xenserver-backup kernel: [<c0217744>] netif_map+0x247/0x26f
Mar 26 15:42:43 xenserver-backup kernel: [<c02108d3>] xs_talkv+0xe3/0x128
Mar 26 15:42:43 xenserver-backup kernel: [<c0210c1c>] xenbus_read+0x34/0x3b
Mar 26 15:42:43 xenserver-backup kernel: [<c0210fde>] xenbus_scanf+0x18/0x4d
Mar 26 15:42:43 xenserver-backup kernel: [<c0216dd5>]
frontend_changed+0x29f/0x4a8
Mar 26 15:42:43 xenserver-backup kernel: [<c0211fbc>] otherend_changed+0x74/0x79
Mar 26 15:42:43 xenserver-backup kernel: [<c0210756>]
xenwatch_handle_callback+0x12/0x44
Mar 26 15:42:43 xenserver-backup kernel: [<c021119b>]
xenwatch_thread+0x105/0x11b
Mar 26 15:42:43 xenserver-backup kernel: [<c012b6f9>]
autoremove_wake_function+0x0/0x2d
Mar 26 15:42:43 xenserver-backup kernel: [<c0211096>] xenwatch_thread+0x0/0x11b
Mar 26 15:42:43 xenserver-backup kernel: [<c012b62d>] kthread+0xc0/0xeb
Mar 26 15:42:43 xenserver-backup kernel: [<c012b56d>] kthread+0x0/0xeb
Mar 26 15:42:43 xenserver-backup kernel: [<c010293d>]
kernel_thread_helper+0x5/0xb
Mar 26 15:42:43 xenserver-backup kernel: Code: ee 85 f6 75 96 58 5a 5b
5e 5f 5d c3 0f b7 0c 85 40 b8 37 c0 8b 15 84 19 2d c0 85 c9 74 1d 0f
a3 8a 80 08 00 00
19 c0 85 c0 75 08 <0f> 0b e1 01 92 1a 2b c0 f0 0f ab 8a 00 08 00 00 b8
01 00 00 00
Mar 26 15:42:43 xenserver-backup kernel: EIP: [<c020c3be>]
retrigger+0x1f/0x35 SS:ESP 0069:c039deb0

Any idea what was the problem?

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