Comment 2 for bug 148543

I am also getting this problem. Unfortunately it's on every single reboot of the server.

Jan 10 09:24:44 vali kernel: [ 81.094131] ------------[ cut here ]------------
Jan 10 09:24:44 vali kernel: [ 81.094195] kernel BUG at drivers/xen/core/evtchn.c:481!
Jan 10 09:24:44 vali kernel: [ 81.094246] invalid opcode: 0000 [#1]
Jan 10 09:24:44 vali kernel: [ 81.094296] SMP
Jan 10 09:24:44 vali kernel: [ 81.094434] Modules linked in: xt_tcpudp xt_physdev iptable_filter ip_tables x_tables af_packet bridge video sbs i2c_ec button
battery container ac asus_acpi loop lp serial_core parport_pc parport ipv6 i2c_piix4 i2c_core k8temp ati_agp agpgart psmouse serio_raw pcspkr shpchp pci_hotplu
g evdev ext3 jbd mbcache sg sd_mod floppy tg3 atiixp ohci_hcd ehci_hcd usbcore sata_sil ata_generic libata scsi_mod generic thermal processor fan dm_mod
Jan 10 09:24:44 vali kernel: [ 81.096858] CPU: 1
Jan 10 09:24:44 vali kernel: [ 81.096859] EIP: 0061:[retrigger_vector+62/80] Not tainted VLI
Jan 10 09:24:44 vali kernel: [ 81.096860] EFLAGS: 00010046 (2.6.19-4-server #2)
Jan 10 09:24:44 vali kernel: [ 81.097014] EIP is at retrigger_vector+0x3e/0x50
Jan 10 09:24:44 vali kernel: [ 81.097065] eax: 00000000 ebx: 02080000 ecx: f5746000 edx: 0000003b
Jan 10 09:24:44 vali kernel: [ 81.097117] esi: c03de380 edi: 0000011f ebp: 00000000 esp: c1703e60
Jan 10 09:24:44 vali kernel: [ 81.097169] ds: 007b es: 007b ss: 0069
Jan 10 09:24:44 vali kernel: [ 81.097220] Process xenwatch (pid: 13, ti=c1702000 task=c1778560 task.ti=c1702000)
Jan 10 09:24:44 vali kernel: [ 81.097272] Stack: c014b691 c03de380 0000011f c03de3a8 c014b355 c0131aee 00000000 00000001
Jan 10 09:24:44 vali kernel: [ 81.097714] 00000001 d5691400 00000000 c1703efc d5691400 c0257ecb 00000000 c025834f
Jan 10 09:24:44 vali kernel: [ 81.098155] d5691000 d5691400 d5a91b40 00000002 00000000 00000000 c1703efc c1703ec0
Jan 10 09:24:44 vali kernel: [ 81.098596] Call Trace:
Jan 10 09:24:44 vali kernel: [ 81.099061] [check_irq_resend+97/112] check_irq_resend+0x61/0x70
Jan 10 09:24:44 vali kernel: [ 81.099248] [enable_irq+197/208] enable_irq+0xc5/0xd0
Jan 10 09:24:44 vali kernel: [ 81.099431] [__netif_up+11/32] __netif_up+0xb/0x20
Jan 10 09:24:44 vali kernel: [ 81.099887] [netif_map+623/736] netif_map+0x26f/0x2e0
Jan 10 09:24:44 vali kernel: [ 81.100349] [maybe_connect+509/1312] maybe_connect+0x1fd/0x520
Jan 10 09:24:44 vali kernel: [ 81.100811] [otherend_changed+175/192] otherend_changed+0xaf/0xc0
Jan 10 09:24:44 vali kernel: [ 81.101265] [xenwatch_handle_callback+26/96] xenwatch_handle_callback+0x1a/0x60
Jan 10 09:24:44 vali kernel: [ 81.101721] [xenwatch_thread+285/304] xenwatch_thread+0x11d/0x130
Jan 10 09:24:44 vali kernel: [ 81.102176] [kthread+246/256] kthread+0xf6/0x100
Jan 10 09:24:44 vali kernel: [ 81.102339] [kernel_thread_helper+7/16] kernel_thread_helper+0x7/0x10
Jan 10 09:24:44 vali kernel: [ 81.102443] =======================
Jan 10 09:24:44 vali kernel: [ 81.102493] Code: b8 01 00 00 00 c3 8d b4 26 00 00 00 00 0f b7 d0 0f a3 91 80 08 00 00 19 c0 85 c0 74 0e f0 0f ab 91 00 08 00 0
0 b8 01 00 00 00 c3 <0f> 0b e1 01 e9 8f 32 c0 eb e8 90 8d b4 26 00 00 00 00 0f b7 04
Jan 10 09:24:44 vali kernel: [ 81.105391] EIP: [retrigger_vector+62/80] retrigger_vector+0x3e/0x50 SS:ESP 0069:c1703e60