[Xen-users] Server loses network connection for a period of time and comes back randomly

[Xeross <xeross@xxxxxxxxxxxxxx>]

Hey,

For some reason my server seems to lose its network connection every now and then, the CPU utilization is around 60-70% (http://munin.x3tech.com/VMHost/VMHost/xen_cpu_v2.html) and I am using the kernel from the GIT repository.

Met network card is an Intel 1gbit one and all my domU's are 64bit debian running in HVM, dom0 is also debian.

For some reason it also seems that once I log in to the server (I have physical access) the problem dissappears and the network comes back.

Is this a load problem with Xen or could this be something else, I do have the occasional soft-lockup, could this be related ?

[648154.682926] BUG: soft lockup - CPU#0 stuck for 73s! [qemu-dm:9446]
[648154.682926] Modules linked in: tun nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_physdev iptable_filter ip_tables x_tables bridge stp ext4 jbd2 crc16 loop snd_hda_codec_realtek parport_pc parport snd_hda_intel snd_hda_codec snd_pcsp snd_hwdep tpm_tis tpm tpm_bios evdev snd_pcm snd_timer k8temp snd soundcore edac_core edac_mce_amd i2c_piix4 snd_page_alloc i2c_core processor button acpi_processor shpchp pci_hotplug ext3 jbd mbcache raid1 md_mod sg sr_mod sd_mod cdrom crc_t10dif ata_generic ahci pata_atiixp e1000 libata ehci_hcd ohci_hcd scsi_mod usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[648154.682926] CPU 0:
[648154.682926] Modules linked in: tun nf_conntrack_ipv4 nf_defrag_ipv4 xt_state nf_conntrack xt_physdev iptable_filter ip_tables x_tables bridge stp ext4 jbd2 crc16 loop snd_hda_codec_realtek parport_pc parport snd_hda_intel snd_hda_codec snd_pcsp snd_hwdep tpm_tis tpm tpm_bios evdev snd_pcm snd_timer k8temp snd soundcore edac_core edac_mce_amd i2c_piix4 snd_page_alloc i2c_core processor button acpi_processor shpchp pci_hotplug ext3 jbd mbcache raid1 md_mod sg sr_mod sd_mod cdrom crc_t10dif ata_generic ahci pata_atiixp e1000 libata ehci_hcd ohci_hcd scsi_mod usbcore nls_base thermal fan thermal_sys [last unloaded: scsi_wait_scan]
[648154.682926] Pid: 9446, comm: qemu-dm Tainted: G        W  2.6.32.25 #1 RS690M2MA
[648154.682926] RIP: e030:[<ffffffff8100922a>]  [<ffffffff8100922a>] hypercall_page+0x22a/0x1001
[648154.682926] RSP: e02b:ffff88001831ee28  EFLAGS: 00000246
[648154.682926] RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffffff8100922a
[648154.682926] RDX: ffff88001831b000 RSI: 0000000000000000 RDI: 0000000000000000
[648154.682926] RBP: ffff88016a6068b0 R08: 0000000000000002 R09: 0000000000000000
[648154.682926] R10: ffff880180000000 R11: 0000000000000246 R12: 0000000000000040
[648154.682926] R13: 0000000000000000 R14: 0000000000000040 R15: ffff88001832de00
[648154.682926] FS:  00007f5681f586e0(0000) GS:ffff88001831b000(0000) knlGS:0000000000000000
[648154.682926] CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
[648154.682926] CR2: 00000000015c3028 CR3: 00000000258a6000 CR4: 0000000000000660
[648154.682926] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[648154.682926] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[648154.682926] Call Trace:
[648154.682926]  <IRQ>  [<ffffffff8100e8ad>] ? xen_force_evtchn_callback+0x9/0xa
[648154.682926]  [<ffffffff8100ef62>] ? check_events+0x12/0x20
[648154.682926]  [<ffffffff8100ef09>] ? xen_irq_enable_direct_end+0x0/0x7
[648154.682926]  [<ffffffff8125f04e>] ? net_rx_action+0x17a/0x1c9
[648154.682926]  [<ffffffff81054bce>] ? __do_softirq+0xdd/0x19f
[648154.682926]  [<ffffffff811f070a>] ? ack_dynirq+0x18/0x26
[648154.682926]  [<ffffffff81012cac>] ? call_softirq+0x1c/0x30
[648154.682926]  [<ffffffff8101422b>] ? do_softirq+0x3f/0x7c
[648154.682926]  [<ffffffff81054a3d>] ? irq_exit+0x36/0x76
[648154.682926]  [<ffffffff811f00f7>] ? xen_evtchn_do_upcall+0x33/0x41
[648154.682926]  [<ffffffff81012cfe>] ? xen_do_hypervisor_callback+0x1e/0x30
[648154.682926]  <EOI>

Regards, Xeross

_______________________________________________
Xen-users mailing list
Xen-users@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-users