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Re: [Xen-devel] Re: xenstored unsafe lock order detected, xlate_proc_name, evtchn_ioctl, port_user_lock

  • To: Pasi Kärkkäinen <pasik@xxxxxx>
  • From: Bruce Edge <bruce.edge@xxxxxxxxx>
  • Date: Thu, 26 Aug 2010 11:05:52 -0700
  • Cc: Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 26 Aug 2010 11:06:44 -0700
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  • List-id: Xen developer discussion <xen-devel.lists.xensource.com>
On Tue, Jul 20, 2010 at 10:17 AM, Pasi Kärkkäinen <pasik@xxxxxx> wrote:
On Tue, Jul 20, 2010 at 09:17:26AM -0700, Jeremy Fitzhardinge wrote:
> On 07/20/2010 04:53 AM, Pasi Kärkkäinen wrote:
> > On Mon, Jun 07, 2010 at 09:50:13AM -0700, Jeremy Fitzhardinge wrote:
> >
> >> On 06/07/2010 05:58 AM, Pasi Kärkkäinen wrote:
> >>
> >>> On Sun, Jun 06, 2010 at 09:54:01PM +0300, Pasi Kärkkäinen wrote:
> >>>
> >>>
> >>>> On Sun, Jun 06, 2010 at 10:41:04AM -0700, Jeremy Fitzhardinge wrote:
> >>>>
> >>>>
> >>>>> On 06/06/2010 10:33 AM, Pasi Kärkkäinen wrote:
> >>>>>
> >>>>>
> >>>>>> Hello,
> >>>>>>
> >>>>>> I just tried the latest xen/stable-2.6.32.x kernel, ie. 2.6.32.15, with Xen 4.0.0,
> >>>>>> and I got this:
> >>>>>>
> >>>>>> http://pasik.reaktio.net/xen/pv_ops-dom0-debug/log-2.6.32.15-pvops-dom0-xen-stable-x86_64.txt
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>> Does this help?
> >>>>>
> >>>>>
> >>>>>
> >>>> It gave failing hunks so I had to manually apply it to 2.6.32.15,
> >>>> but it seems to fix that issue. No "unsafe lock order" messages anymore.
> >>>>
> >>>>
> >>>>
> >>> Hmm.. it seems I still get this:
> >>>
> >>>
> >> OK, thanks.  Let me look at it; that was a first cut patch I did the
> >> other day when I noticed the problem, but I hadn't got around to testing
> >> it myself.
> >>
> >>
> > I just tried the latest xen/stable-2.6.32.16 (as of today),
> > without any additional patches, and I get this:
> >
>
> Is that new?
>

I think it's the same as earlier..

-- Pasi

>
> >
> > device vif1.0 entered promiscuous mode
> > virbr0: topology change detected, propagating
> > virbr0: port 1(vif1.0) entering forwarding state
> >   alloc irq_desc for 1242 on node 0
> >   alloc kstat_irqs on node 0
> >   alloc irq_desc for 1241 on node 0
> >   alloc kstat_irqs on node 0
> >   alloc irq_desc for 1240 on node 0
> >   alloc kstat_irqs on node 0
> > blkback: ring-ref 8, event-channel 8, protocol 1 (x86_64-abi)
> >   alloc irq_desc for 1239 on node 0
> >   alloc kstat_irqs on node 0
> > vif1.0: no IPv6 routers present
> >   alloc irq_desc for 1238 on node 0
> >   alloc kstat_irqs on node 0
> > ------------[ cut here ]------------
> > WARNING: at kernel/lockdep.c:2323 trace_hardirqs_on_caller+0xb7/0x135()
> > Hardware name: X7SB4/E
> > Modules linked in: ipt_MASQUERADE iptable_nat nf_nat bridge stp llc sunrpc ip6t_REJECT nf_conntrack_ipv6 ip6table_filter ip6_tables ipv6 xen_gntdev xen_evtchn xenfs e1000e shpchp i2c_i801 pcspkr iTCO_wdt iTCO_vendor_support serio_raw joydev floppy usb_storage video output aic79xx scsi_transport_spi radeon ttm drm_kms_helper drm i2c_algo_bit i2c_core [last unloaded: scsi_wait_scan]
> > Pid: 23, comm: xenwatch Not tainted 2.6.32.16 #6
> > Call Trace:
> >  <IRQ>  [<ffffffff81059c41>] warn_slowpath_common+0x7c/0x94
> >  [<ffffffff8147896b>] ? _spin_unlock_irq+0x30/0x3c
> >  [<ffffffff81059c6d>] warn_slowpath_null+0x14/0x16
> >  [<ffffffff8108b186>] trace_hardirqs_on_caller+0xb7/0x135
> >  [<ffffffff8108b211>] trace_hardirqs_on+0xd/0xf
> >  [<ffffffff8147896b>] _spin_unlock_irq+0x30/0x3c
> >  [<ffffffff812c15d7>] add_to_net_schedule_list_tail+0x92/0x9b
> >  [<ffffffff812c1618>] netif_be_int+0x38/0xcd
> >  [<ffffffff810b8144>] handle_IRQ_event+0x53/0x119
> >  [<ffffffff810ba0e6>] handle_level_irq+0x7d/0xdf
> >  [<ffffffff812b6f45>] __xen_evtchn_do_upcall+0xe1/0x16e
> >  [<ffffffff812b74b8>] xen_evtchn_do_upcall+0x37/0x4c
> >  [<ffffffff81013f3e>] xen_do_hypervisor_callback+0x1e/0x30
> >  <EOI>  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x100b
> >  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x100b
> >  [<ffffffff812b9f9b>] ? notify_remote_via_evtchn+0x1e/0x44
> >  [<ffffffff814776a1>] ? __mutex_lock_common+0x36a/0x37b
> >  [<ffffffff812ba8b8>] ? xs_talkv+0x5c/0x174
> >  [<ffffffff812ba30c>] ? xb_write+0x16e/0x18a
> >  [<ffffffff812ba8c6>] ? xs_talkv+0x6a/0x174
> >  [<ffffffff81242b86>] ? kasprintf+0x38/0x3a
> >  [<ffffffff812bab15>] ? xs_single+0x3a/0x3c
> >  [<ffffffff812bb0f0>] ? xenbus_read+0x42/0x5b
> >  [<ffffffff812c3de4>] ? frontend_changed+0x655/0x681
> >  [<ffffffff812bc0e7>] ? xenbus_otherend_changed+0xe9/0x176
> >  [<ffffffff8100f34f>] ? xen_restore_fl_direct_end+0x0/0x1
> >  [<ffffffff8108d94e>] ? lock_release+0x198/0x1a5
> >  [<ffffffff812bc712>] ? frontend_changed+0x10/0x12
> >  [<ffffffff812ba63d>] ? xenwatch_thread+0x111/0x14c
> >  [<ffffffff81079d7a>] ? autoremove_wake_function+0x0/0x39
> >  [<ffffffff812ba52c>] ? xenwatch_thread+0x0/0x14c
> >  [<ffffffff81079aa8>] ? kthread+0x7f/0x87
> >  [<ffffffff81013dea>] ? child_rip+0xa/0x20
> >  [<ffffffff81013750>] ? restore_args+0x0/0x30
> >  [<ffffffff81013de0>] ? child_rip+0x0/0x20
> > ---[ end trace b036c0423b0ee26a ]---
> >   alloc irq_desc for 1237 on node 0
> >   alloc kstat_irqs on node 0
> > device vif2.0 entered promiscuous mode
> >
> >
> > -- Pasi
> >
> >
>

 
I'm also seeing this with the newly released xen 4.0.1 and a  Not tainted 2.6.32.18 pvops sync'd yesterday:

2010-08-26T10:57:12.085252-07:00 kaan-18 [ 4698.128356] blkback: ring-ref 8, event-channel 93, protocol 1 (x86_64-abi)
2010-08-26T10:57:12.126039-07:00 kaan-18 [ 4698.168555] ------------[ cut here ]------------
2010-08-26T10:57:12.126141-07:00 kaan-18 [ 4698.168569] WARNING: at kernel/lockdep.c:2323 trace_hardirqs_on_caller+0x12f/0x190()
2010-08-26T10:57:12.126220-07:00 kaan-18 [ 4698.168574] Hardware name: ProLiant DL380 G6
2010-08-26T10:57:12.126297-07:00 kaan-18 [ 4698.168578] Modules linked in: xt_physdev xenfs xen_gntdev xen_evtchn ipv6 xen_pciback t2010-08-26T10:57:12.126297-07:00 kaan-18 [ 4698.168578] Modules linked in: xt_physdev xenfs xen_gntdev xen_evtchn ipv6 xen_pciback t
un fbcon tileblit font bitblit softcursor bridge stp llc radeon ttm drm_kms_helper lp drm i2c_algo_bit ipmi_si joydev i2c_core ipmi_msghandler hpilo hpwdt parport serio_raw usbhid hid cciss usb_storage
2010-08-26T10:57:12.126405-07:00 kaan-18 [ 4698.168644] Pid: 11, comm: xenwatch Not tainted 2.6.32.18 #1
2010-08-26T10:57:12.126482-07:00 kaan-18 [ 4698.168648] Call Trace:
2010-08-26T10:57:12.126559-07:00 kaan-18 [ 4698.168651]  <IRQ>  [<ffffffff810a9f7f>] ? trace_hardirqs_on_caller+0x12f/0x190
2010-08-26T10:57:12.126655-07:00 kaan-18 [ 4698.168663]  [<ffffffff8106bd60>] warn_slowpath_common+0x80/0xd0
2010-08-26T10:57:12.126731-07:00 kaan-18 [ 4698.168671]  [<ffffffff815f3d70>] ? _spin_unlock_irq+0x30/0x40
2010-08-26T10:57:12.126806-07:00 kaan-18 [ 4698.168676]  [<ffffffff8106bdc4>] warn_slowpath_null+0x14/0x20
2010-08-26T10:57:12.126881-07:00 kaan-18 [ 4698.168682]  [<ffffffff810a9f7f>] trace_hardirqs_on_caller+0x12f/0x190
2010-08-26T10:57:12.126957-07:00 kaan-18 [ 4698.168688]  [<ffffffff810a9fed>] trace_hardirqs_on+0xd/0x10
2010-08-26T10:57:12.127034-07:00 kaan-18 [ 4698.168693]  [<ffffffff815f3d70>] _spin_unlock_irq+0x30/0x40
2010-08-26T10:57:12.127110-07:00 kaan-18 [ 4698.168700]  [<ffffffff813c4e75>] add_to_net_schedule_list_tail+0x85/0xd0
2010-08-26T10:57:12.127186-07:00 kaan-18 [ 4698.168724]  [<ffffffff813c60c6>] netif_be_int+0x36/0x160
2010-08-26T10:57:12.127263-07:00 kaan-18 [ 4698.168730]  [<ffffffff810e0ea0>] handle_IRQ_event+0x70/0x180
2010-08-26T10:57:12.127338-07:00 kaan-18 [ 4698.168736]  [<ffffffff810e3c69>] handle_level_irq+0x99/0x140
2010-08-26T10:57:12.127433-07:00 kaan-18 [ 4698.168742]  [<ffffffff813b8acf>] __xen_evtchn_do_upcall+0x1bf/0x1f0
2010-08-26T10:57:12.127509-07:00 kaan-18 [ 4698.168747]  [<ffffffff813b908d>] xen_evtchn_do_upcall+0x3d/0x60
2010-08-26T10:57:12.127577-07:00 kaan-18 [ 4698.168754]  [<ffffffff8101647e>] xen_do_hypervisor_callback+0x1e/0x30
2010-08-26T10:57:12.127584-07:00 kaan-18 [ 4698.168758]  <EOI>  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x1010
2010-08-26T10:57:12.127589-07:00 kaan-18 [ 4698.168769]  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x1010
2010-08-26T10:57:12.127595-07:00 kaan-18 [ 4698.168775]  [<ffffffff813bcd04>] ? xb_write+0x1e4/0x290
2010-08-26T10:57:12.127650-07:00 kaan-18 [ 4698.168780]  [<ffffffff813bd77a>] ? xs_talkv+0x6a/0x1f0
2010-08-26T10:57:12.127657-07:00 kaan-18 [ 4698.168785]  [<ffffffff813bd788>] ? xs_talkv+0x78/0x1f0
2010-08-26T10:57:12.127662-07:00 kaan-18 [ 4698.168790]  [<ffffffff813bda7d>] ? xs_single+0x4d/0x60
2010-08-26T10:57:12.127667-07:00 kaan-18 [ 4698.168795]  [<ffffffff813be3b2>] ? xenbus_read+0x52/0x80
2010-08-26T10:57:12.127673-07:00 kaan-18 [ 4698.168800]  [<ffffffff813c86ac>] ? frontend_changed+0x48c/0x770
2010-08-26T10:57:12.127678-07:00 kaan-18 [ 4698.168806]  [<ffffffff813bf61d>] ? xenbus_otherend_changed+0xdd/0x1b0
2010-08-26T10:57:12.127684-07:00 kaan-18 [ 4698.168813]  [<ffffffff81010e3f>] ? xen_restore_fl_direct_end+0x0/0x1
2010-08-26T10:57:12.127689-07:00 kaan-18 [ 4698.168818]  [<ffffffff810ac610>] ? lock_release+0xb0/0x230
2010-08-26T10:57:12.127770-07:00 kaan-18 [ 4698.168823]  [<ffffffff813bf990>] ? frontend_changed+0x10/0x20
2010-08-26T10:57:12.127777-07:00 kaan-18 [ 4698.168829]  [<ffffffff813bd3a5>] ? xenwatch_thread+0x55/0x160
2010-08-26T10:57:12.127782-07:00 kaan-18 [ 4698.168836]  [<ffffffff810932b0>] ? autoremove_wake_function+0x0/0x40
2010-08-26T10:57:12.127788-07:00 kaan-18 [ 4698.168841]  [<ffffffff813bd350>] ? xenwatch_thread+0x0/0x160
2010-08-26T10:57:12.127793-07:00 kaan-18 [ 4698.168847]  [<ffffffff81092f36>] ? kthread+0x96/0xb0
2010-08-26T10:57:12.127799-07:00 kaan-18 [ 4698.168852]  [<ffffffff8101632a>] ? child_rip+0xa/0x20
2010-08-26T10:57:12.127804-07:00 kaan-18 [ 4698.168856]  [<ffffffff81015c90>] ? restore_args+0x0/0x30
2010-08-26T10:57:12.137042-07:00 kaan-18 [ 4698.168861]  [<ffffffff81016320>] ? child_rip+0x0/0x20
2010-08-26T10:57:12.137052-07:00 kaan-18 [ 4698.168865] ---[ end trace d11f63be69302ffc ]---
2010-08-26T10:57:18.775160-07:00 kaan-18 [ 4704.813405] vif3.0: no IPv6 routers present
 'cpu/8/availability': 'online', 'cpu/9/availability': 'online', 'image/suspend-cancel': '1', 'cpu/5/availability': 'online', 'cpu/0/availability': 'online', 'image/features/pae-pgdir-above-4gb': '1', 'cpu/6/availability': 'online', 'console/type': 'xenconsoled', 'cpu/12/availability': 'online', 'name': 'dpm', 'cpu/2/availability': 'online', 'domid': '3', 'image/xen-version': 'xen-3.0', 'store/port': '1', 'cpu/10/availability': 'online'}
[2010-08-26 10:57:09 1840] DEBUG (DevController:95) DevController: writing {'protocol': 'x86_64-abi', 'state': '1', 'backend-id': '0', 'backend': '/local/domain/0/backend/console/3/0'} to /local/domain/3/device/console/0.
[2010-08-26 10:57:09 1840] DEBUG (DevController:97) DevController: writing {'domain': 'dpm', 'frontend': '/local/domain/3/device/console/0', 'uuid': '460962e0-bc9b-f7de-b5f4-70715fb5d614', 'frontend-id': '3', 'state': '1', 'location': '2', 'online': '1', 'protocol': 'vt100'} to /local/domain/0/backend/console/3/0.
[2010-08-26 10:57:09 1840] DEBUG (pciif:460) XendDomainInfo.handleAerStateWatch
[2010-08-26 10:57:09 1840] DEBUG (XendDomainInfo:1891) XendDomainInfo.handleShutdownWatch
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices tap2.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vif.
[2010-08-26 10:57:09 1840] DEBUG (DevController:144) Waiting for 0.
[2010-08-26 10:57:09 1840] DEBUG (DevController:628) hotplugStatusCallback /local/domain/0/backend/vif/3/0/hotplug-status.
[2010-08-26 10:57:09 1840] DEBUG (DevController:642) hotplugStatusCallback 1.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vkbd.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices ioports.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices tap.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vif2.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices console.
[2010-08-26 10:57:09 1840] DEBUG (DevController:144) Waiting for 0.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vscsi.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vbd.
[2010-08-26 10:57:09 1840] DEBUG (DevController:144) Waiting for 51712.
[2010-08-26 10:57:09 1840] DEBUG (DevController:628) hotplugStatusCallback /local/domain/0/backend/vbd/3/51712/hotplug-status.
[2010-08-26 10:57:09 1840] DEBUG (DevController:642) hotplugStatusCallback 1.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices irq.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vfb.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices pci.
[2010-08-26 10:57:09 1840] DEBUG (DevController:144) Waiting for 0.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vusb.
[2010-08-26 10:57:09 1840] DEBUG (DevController:139) Waiting for devices vtpm.
[2010-08-26 10:57:09 1840] INFO (XendDomain:1206) Domain dpm (3) unpaused.

==> kern.log <==
2010-08-26T10:57:12.085252-07:00 kaan-18 [ 4698.128356] blkback: ring-ref 8, event-channel 93, protocol 1 (x86_64-abi)
2010-08-26T10:57:12.126039-07:00 kaan-18 [ 4698.168555] ------------[ cut here ]------------
2010-08-26T10:57:12.126141-07:00 kaan-18 [ 4698.168569] WARNING: at kernel/lockdep.c:2323 trace_hardirqs_on_caller+0x12f/0x190()
2010-08-26T10:57:12.126220-07:00 kaan-18 [ 4698.168574] Hardware name: ProLiant DL380 G6
2010-08-26T10:57:12.126297-07:00 kaan-18 [ 4698.168578] Modules linked in: xt_physdev xenfs xen_gntdev xen_evtchn ipv6 xen_pciback tun fbcon tileblit font bitblit softcursor bridge stp llc radeon ttm drm_kms_helper lp drm i2c_algo_bit ipmi_si joydev i2c_core ipmi_msghandler hpilo hpwdt parport serio_raw usbhid hid cciss usb_storage
2010-08-26T10:57:12.126405-07:00 kaan-18 [ 4698.168644] Pid: 11, comm: xenwatch Not tainted 2.6.32.18 #1
2010-08-26T10:57:12.126482-07:00 kaan-18 [ 4698.168648] Call Trace:
2010-08-26T10:57:12.126559-07:00 kaan-18 [ 4698.168651]  <IRQ>  [<ffffffff810a9f7f>] ? trace_hardirqs_on_caller+0x12f/0x190
2010-08-26T10:57:12.126655-07:00 kaan-18 [ 4698.168663]  [<ffffffff8106bd60>] warn_slowpath_common+0x80/0xd0
2010-08-26T10:57:12.126731-07:00 kaan-18 [ 4698.168671]  [<ffffffff815f3d70>] ? _spin_unlock_irq+0x30/0x40
2010-08-26T10:57:12.126806-07:00 kaan-18 [ 4698.168676]  [<ffffffff8106bdc4>] warn_slowpath_null+0x14/0x20
2010-08-26T10:57:12.126881-07:00 kaan-18 [ 4698.168682]  [<ffffffff810a9f7f>] trace_hardirqs_on_caller+0x12f/0x190
2010-08-26T10:57:12.126957-07:00 kaan-18 [ 4698.168688]  [<ffffffff810a9fed>] trace_hardirqs_on+0xd/0x10
2010-08-26T10:57:12.127034-07:00 kaan-18 [ 4698.168693]  [<ffffffff815f3d70>] _spin_unlock_irq+0x30/0x40
2010-08-26T10:57:12.127110-07:00 kaan-18 [ 4698.168700]  [<ffffffff813c4e75>] add_to_net_schedule_list_tail+0x85/0xd0
2010-08-26T10:57:12.127186-07:00 kaan-18 [ 4698.168724]  [<ffffffff813c60c6>] netif_be_int+0x36/0x160
2010-08-26T10:57:12.127263-07:00 kaan-18 [ 4698.168730]  [<ffffffff810e0ea0>] handle_IRQ_event+0x70/0x180
2010-08-26T10:57:12.127338-07:00 kaan-18 [ 4698.168736]  [<ffffffff810e3c69>] handle_level_irq+0x99/0x140
2010-08-26T10:57:12.127433-07:00 kaan-18 [ 4698.168742]  [<ffffffff813b8acf>] __xen_evtchn_do_upcall+0x1bf/0x1f0
2010-08-26T10:57:12.127509-07:00 kaan-18 [ 4698.168747]  [<ffffffff813b908d>] xen_evtchn_do_upcall+0x3d/0x60
2010-08-26T10:57:12.127577-07:00 kaan-18 [ 4698.168754]  [<ffffffff8101647e>] xen_do_hypervisor_callback+0x1e/0x30
2010-08-26T10:57:12.127584-07:00 kaan-18 [ 4698.168758]  <EOI>  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x1010
2010-08-26T10:57:12.127589-07:00 kaan-18 [ 4698.168769]  [<ffffffff8100940a>] ? hypercall_page+0x40a/0x1010
2010-08-26T10:57:12.127595-07:00 kaan-18 [ 4698.168775]  [<ffffffff813bcd04>] ? xb_write+0x1e4/0x290
2010-08-26T10:57:12.127650-07:00 kaan-18 [ 4698.168780]  [<ffffffff813bd77a>] ? xs_talkv+0x6a/0x1f0
2010-08-26T10:57:12.127657-07:00 kaan-18 [ 4698.168785]  [<ffffffff813bd788>] ? xs_talkv+0x78/0x1f0
2010-08-26T10:57:12.127662-07:00 kaan-18 [ 4698.168790]  [<ffffffff813bda7d>] ? xs_single+0x4d/0x60
2010-08-26T10:57:12.127667-07:00 kaan-18 [ 4698.168795]  [<ffffffff813be3b2>] ? xenbus_read+0x52/0x80
2010-08-26T10:57:12.127673-07:00 kaan-18 [ 4698.168800]  [<ffffffff813c86ac>] ? frontend_changed+0x48c/0x770
2010-08-26T10:57:12.127678-07:00 kaan-18 [ 4698.168806]  [<ffffffff813bf61d>] ? xenbus_otherend_changed+0xdd/0x1b0
2010-08-26T10:57:12.127684-07:00 kaan-18 [ 4698.168813]  [<ffffffff81010e3f>] ? xen_restore_fl_direct_end+0x0/0x1
2010-08-26T10:57:12.127689-07:00 kaan-18 [ 4698.168818]  [<ffffffff810ac610>] ? lock_release+0xb0/0x230
2010-08-26T10:57:12.127770-07:00 kaan-18 [ 4698.168823]  [<ffffffff813bf990>] ? frontend_changed+0x10/0x20
2010-08-26T10:57:12.127777-07:00 kaan-18 [ 4698.168829]  [<ffffffff813bd3a5>] ? xenwatch_thread+0x55/0x160
2010-08-26T10:57:12.127782-07:00 kaan-18 [ 4698.168836]  [<ffffffff810932b0>] ? autoremove_wake_function+0x0/0x40
2010-08-26T10:57:12.127788-07:00 kaan-18 [ 4698.168841]  [<ffffffff813bd350>] ? xenwatch_thread+0x0/0x160
2010-08-26T10:57:12.127793-07:00 kaan-18 [ 4698.168847]  [<ffffffff81092f36>] ? kthread+0x96/0xb0
2010-08-26T10:57:12.127799-07:00 kaan-18 [ 4698.168852]  [<ffffffff8101632a>] ? child_rip+0xa/0x20
2010-08-26T10:57:12.127804-07:00 kaan-18 [ 4698.168856]  [<ffffffff81015c90>] ? restore_args+0x0/0x30
2010-08-26T10:57:12.137042-07:00 kaan-18 [ 4698.168861]  [<ffffffff81016320>] ? child_rip+0x0/0x20
2010-08-26T10:57:12.137052-07:00 kaan-18 [ 4698.168865] ---[ end trace d11f63be69302ffc ]---
2010-08-26T10:57:18.775160-07:00 kaan-18 [ 4704.813405] vif3.0: no IPv6 routers present

Possibly related, or not, domU is running of memory:

boot looks normal until here:
[    0.659086] udev: starting version 151
[    0.783917] Initialising Xen virtual ethernet driver.
[    0.805892] blkfront: xvda: barriers enabled
[    0.807202]  xvda: xvda1 xvda2 < xvda5 >
[    1.048985] EXT4-fs (xvda1): mounted filesystem with ordered data mode
[    9.025260] Out of memory: kill process 633 (init) score 898 or a child
[    9.025413] Killed process 633 (init)
[    9.344581] Out of memory: kill process 534 (rsyslogd) score 428 or a child
[    9.344740] Killed process 629 (rsyslogd)
[    9.657456] Out of memory: kill process 424 (mountall) score 405 or a child
[    9.657613] Killed process 424 (mountall)

-Bruce
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