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Re: [Xen-devel] Xen 4.0.4, kernel 3.5.0 HVM crash and kernel BUG
Hi,
I have not enabled debug on Xen or dom0 kernel. Could you tell me the parameters for Xen coompilation needed to enable debugging? And If you would also happen to know what are the options needed to enable kernel debugging in menuconfig? Well I can probably manage to get the kernel debugging enabled myself, but if you happen to know them please share so maybe I can get everything enabled at the first try :)
Thanks!
- Valtteri
2012/10/2 Pasi Kärkkäinen <pasik@xxxxxx>
On Tue, Oct 02, 2012 at 04:01:04PM +0300, Valtteri Kiviniemi wrote:
> Hi,
>
> I already tried 3.2, 3.5, 3.5.0, 3.6.0-rc7 and 3.6.0, same problem all of
> those. My dom0 config is the same config that I'am using on other server
> where HVM is working, so I dont think that it is a config problem. I have
> triple checked everything and all should be ok. dom0 dmesg shows the same
> crash that I have previously posted here. /var/log/xen/ does not contain
> any specific errors.
>
> Could this be some kind of broblem with my motherboard bios being buggy or
> CPU not supported? I'm using the new intel Ivy Bridge processor which has
> integrated GPU, but that should not probably cause these kind of problems.
> Or maybe some ACPI problem? xm dmesg is showing some notices about ACPI.
> Is there any ACPI kernel parameters that I should try booting? This has to
> be somekind of problem with my hardware, or then maybe it could be a
> kernel problem too. I just really cant figure this out myself, I have
> tried everything.
>
Hmm.. I have some distant memories of seeing a patch that fixes a bug
on recent Ivy Bridge systems, but I can't find a link right now.
Maybe you're affected by that..
Also: Did you already post the crash log, with all the debug/verbose options enabled for both Xen and dom0 kernel?
-- Pasi
> Lets take a quick summary of what has been tested, what hardware I'm using
> etc.
>
> Xen-versions tested: 4.2.0, 4.0.4
> Kernel-versions tested: 3.2.0, 3.5.0, 3.5.4, 3.6.0-rc7, 3.6.0
>
> Host OS: Debian testing/wheezy, udev version 175-7, 2.13-35, python
> version 2.7.3~rc2-2.1
>
> Hardware:
>
> CPU: Intel Core i7-3770 3.4GHz
> MB: Intel DQ77MK (latest bios updated)
> Memory: 32GB (4 x 8GB DDR3-1600MHz)
>
> All relevant log files and configs:
>
> dom0 dmesg: [1]http://nago.fi/dmesg.txt
> qemu-dm log: [2]http://nago.fi/qemu-dm.txt
> xm dmesg log: [3]http://nago.fi/xm-dmesg.txt
> domU config: [4]http://nago.fi/domu-config.txt
> dom0 kernel config: [5]http://nago.fi/dom0-config.txt
>
> I have also tried playing with every setting on that domU that I can think
> of and tried different configs etc.
>
> - Valtteri
>
> 2012/10/2 Pasi Kärkkäinen <[6]pasik@xxxxxx>
>
> On Tue, Oct 02, 2012 at 03:11:07PM +0300, Valtteri Kiviniemi wrote:
> > Hi,
> >
> > Another update:
> >
> > I wanted to check that if a Linux HVM would boot with working VNC
> console,
> > so I tried to launch a Debian Squeeze installer on HVM. It refused
> to
> > start ant told me that vbd hotplug scripts were not working. After
> that
> > failure even the Windows domU would not anymore start which was
> previously
> > starting ok.
> >
> > The hotplug scripts also starts hanging on the processes.
> >
> > root 9401 0.1 0.1 17700 1640 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/xen-hotplug-cleanup
> > root 9441 0.1 0.1 17700 1644 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/xen-hotplug-cleanup
> > root 9481 0.1 0.1 17700 1640 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/xen-hotplug-cleanup
> > root 9560 0.1 0.1 17700 1640 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/xen-hotplug-cleanup
> > root 10738 0.1 0.1 17696 1636 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/xen-hotplug-cleanup
> > root 10747 0.1 0.1 17792 1736 ? S 15:05 0:00
> /bin/bash
> > /etc/xen/scripts/block remove
> > root 11286 0.0 0.0 4080 324 ? S 15:06 0:00
> sleep 1
> > root 11290 0.0 0.0 4080 324 ? S 15:06 0:00
> sleep 1
> > root 11294 0.0 0.0 4080 324 ? S 15:06 0:00
> sleep 1
> > root 11298 0.0 0.0 4080 324 ? S 15:06 0:00
> sleep 1
> > root 11302 0.0 0.0 4080 320 ? S 15:06 0:00
> sleep 1
> > root 11306 0.0 0.0 4080 320 ? S 15:06 0:00
> sleep 1
> >
> > Then I did a xm destroy and I had again the kernel BUG on dmesg. So
> it
> > seems that the problem is not fixed by using 3.6.0. Udev version is
> 175-7.
> >
>
> So you have definitely something broken in your system,
> probably in your dom0 kernel. Try with Linux 3.5.4 or 3.4.x,
> and see how that goes.
>
> Any errors in dom0 dmesg? How about in /var/log/xen/* ?
>
> -- Pasi
>
> >
> >
> >
> > Hi,
> >
> > CPU: Intel Core i7-3770 3.4GHz
> > [2][8]http://ark.intel.com/products/65719/
> >
> > MB: Intel DQ77MK (latest bios updated)
> >
> [3][9]http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dq77mk.html
> >
> > Memory: 32GB (4 x 8GB DDR3-1600MHz)
> >
> > Host is Debian wheezy/testing, Xen 4.0.4 and latest 3.6.0 kernel.
> >
> > Noticed also some errors in xm dmesg:
> >
> > root@xen-2:~# xm dmesg
> >
> > (XEN) Xen version 4.0.4 ([4][10]root@xxxxxxxxxxxx) (gcc version
> 4.7.1
> > (Debian 4.7.1-7) ) Sun Sep 30 20:28:26 EEST 2012
> > (XEN) Latest ChangeSet: unavailable
> > (XEN) Bootloader: GNU GRUB 0.97
> > (XEN) Command line: dom0_mem=1280M cpufreq=xen clocksource=hpet
> > (XEN) Video information:
> > (XEN) VGA is text mode 80x25, font 8x16
> > (XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds
> > (XEN) EDID info not retrieved because no DDC retrieval method
> detected
> > (XEN) Disc information:
> > (XEN) Found 4 MBR signatures
> > (XEN) Found 4 EDD information structures
> > (XEN) Xen-e820 RAM map:
> > (XEN) 0000000000000000 - 000000000009d800 (usable)
> > (XEN) 000000000009d800 - 00000000000a0000 (reserved)
> > (XEN) 00000000000e0000 - 0000000000100000 (reserved)
> > (XEN) 0000000000100000 - 0000000020000000 (usable)
> > (XEN) 0000000020000000 - 0000000020200000 (reserved)
> > (XEN) 0000000020200000 - 0000000040004000 (usable)
> > (XEN) 0000000040004000 - 0000000040005000 (reserved)
> > (XEN) 0000000040005000 - 00000000dbe44000 (usable)
> > (XEN) 00000000dbe44000 - 00000000dc2d7000 (reserved)
> > (XEN) 00000000dc2d7000 - 00000000dc2e7000 (ACPI data)
> > (XEN) 00000000dc2e7000 - 00000000dc40c000 (ACPI NVS)
> > (XEN) 00000000dc40c000 - 00000000dc6af000 (reserved)
> > (XEN) 00000000dc6af000 - 00000000dc6b0000 (usable)
> > (XEN) 00000000dc6b0000 - 00000000dc6f3000 (ACPI NVS)
> > (XEN) 00000000dc6f3000 - 00000000dd000000 (usable)
> > (XEN) 00000000dd800000 - 00000000dfa00000 (reserved)
> > (XEN) 00000000f8000000 - 00000000fc000000 (reserved)
> > (XEN) 00000000fec00000 - 00000000fec01000 (reserved)
> > (XEN) 00000000fed00000 - 00000000fed04000 (reserved)
> > (XEN) 00000000fed1c000 - 00000000fed20000 (reserved)
> > (XEN) 00000000fee00000 - 00000000fee01000 (reserved)
> > (XEN) 00000000ff000000 - 0000000100000000 (reserved)
> > (XEN) 0000000100000000 - 000000081e600000 (usable)
> > (XEN) ACPI: RSDP 000F0490, 0024 (r2 INTEL)
> > (XEN) ACPI: XSDT DC2DB080, 007C (r1 INTEL DQ77MK 32 AMI
> > 10013)
> > (XEN) ACPI: FACP DC2E51F0, 010C (r5 INTEL DQ77MK 32 AMI
> > 10013)
> > (XEN) ACPI Warning (tbfadt-0232): FADT (revision 5) is longer
> than ACPI
> > 2.0 version, truncating length 0x10C to 0xF4 [20070126]
> > (XEN) ACPI: DSDT DC2DB188, A061 (r2 INTEL DQ77MK 32 INTL
> > 20051117)
> > (XEN) ACPI: FACS DC40A080, 0040
> > (XEN) ACPI: APIC DC2E5300, 0092 (r3 INTEL DQ77MK 32 AMI
> > 10013)
> > (XEN) ACPI: FPDT DC2E5398, 0044 (r1 INTEL DQ77MK 32 AMI
> > 10013)
> > (XEN) ACPI: TCPA DC2E53E0, 0032 (r2 INTEL DQ77MK 32 MSFT
> > 1000013)
> > (XEN) ACPI: MCFG DC2E5418, 003C (r1 INTEL DQ77MK 32 MSFT
> > 97)
> > (XEN) ACPI: HPET DC2E5458, 0038 (r1 INTEL DQ77MK 32 AMI.
> > 5)
> > (XEN) ACPI: SSDT DC2E5490, 036D (r1 INTEL DQ77MK 32 INTL
> > 20091112)
> > (XEN) ACPI: SSDT DC2E5800, 09AA (r1 INTEL DQ77MK 32 INTL
> > 20051117)
> > (XEN) ACPI: SSDT DC2E61B0, 0A92 (r1 INTEL DQ77MK 32 INTL
> > 20051117)
> > (XEN) ACPI: DMAR DC2E6C48, 00B8 (r1 INTEL DQ77MK 32 INTL
> > 1)
> > (XEN) ACPI: ASF! DC2E6D00, 00A5 (r32 INTEL DQ77MK 32
> TFSM
> > F4240)
> > (XEN) System RAM: 32682MB (33467320kB)
> > (XEN) Domain heap initialised
> > (XEN) ACPI: 32/64X FACS address mismatch in FADT -
> > dc40a080/0000000000000000, using 32
> > (XEN) Processor #0 7:10 APIC version 21
> > (XEN) Processor #2 7:10 APIC version 21
> > (XEN) Processor #4 7:10 APIC version 21
> > (XEN) Processor #6 7:10 APIC version 21
> > (XEN) Processor #1 7:10 APIC version 21
> > (XEN) Processor #3 7:10 APIC version 21
> > (XEN) Processor #5 7:10 APIC version 21
> > (XEN) Processor #7 7:10 APIC version 21
> > (XEN) IOAPIC[0]: apic_id 2, version 32, address 0xfec00000, GSI
> 0-23
> > (XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
> > (XEN) Switched to APIC driver x2apic_cluster.
> > (XEN) x2APIC mode enabled.
> > (XEN) Using scheduler: SMP Credit Scheduler (credit)
> > (XEN) Detected 3392.369 MHz processor.
> > (XEN) Initing memory sharing.
> > (XEN) VMX: Supported advanced features:
> > (XEN) - APIC MMIO access virtualisation
> > (XEN) - APIC TPR shadow
> > (XEN) - Extended Page Tables (EPT)
> > (XEN) - Virtual-Processor Identifiers (VPID)
> > (XEN) - Virtual NMI
> > (XEN) - MSR direct-access bitmap
> > (XEN) - Unrestricted Guest
> > (XEN) EPT supports 2MB super page.
> > (XEN) HVM: ASIDs enabled.
> > (XEN) HVM: VMX enabled
> > (XEN) HVM: Hardware Assisted Paging detected.
> > (XEN) Intel VT-d Snoop Control not enabled.
> > (XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
> > (XEN) Intel VT-d Queued Invalidation enabled.
> > (XEN) Intel VT-d Interrupt Remapping enabled.
> > (XEN) I/O virtualisation enabled
> > (XEN) - Dom0 mode: Relaxed
> > (XEN) Enabled directed EOI with ioapic_ack_old on!
> > (XEN) Total of 8 processors activated.
> > (XEN) ENABLING IO-APIC IRQs
> > (XEN) -> Using old ACK method
> > (XEN) TSC is reliable, synchronization unnecessary
> > (XEN) Platform timer appears to have unexpectedly wrapped 1
> times.
> > (XEN) Platform timer is 14.318MHz HPET
> > (XEN) Allocated console ring of 16 KiB.
> > (XEN) Brought up 8 CPUs
> > (XEN) *** LOADING DOMAIN 0 ***
> > (XEN) Xen kernel: 64-bit, lsb, compat32
> > (XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 ->
> 0x1ae7000
> > (XEN) PHYSICAL MEMORY ARRANGEMENT:
> > (XEN) Dom0 alloc.: 0000000804000000->0000000806000000 (319488
> pages
> > to be allocated)
> > (XEN) VIRTUAL MEMORY ARRANGEMENT:
> > (XEN) Loaded kernel: ffffffff81000000->ffffffff81ae7000
> > (XEN) Init. ramdisk: ffffffff81ae7000->ffffffff81ae7000
> > (XEN) Phys-Mach map: ffffffff81ae7000->ffffffff81d67000
> > (XEN) Start info: ffffffff81d67000->ffffffff81d674b4
> > (XEN) Page tables: ffffffff81d68000->ffffffff81d7b000
> > (XEN) Boot stack: ffffffff81d7b000->ffffffff81d7c000
> > (XEN) TOTAL: ffffffff80000000->ffffffff82000000
> > (XEN) ENTRY ADDRESS: ffffffff815e3210
> > (XEN) Dom0 has maximum 8 VCPUs
> > (XEN) [VT-D]iommu.c:718: BIOS did not enable IGD for VT properly.
> > Disabling IGD VT-d engine.
> > (XEN) Scrubbing Free RAM: done.
> > (XEN) Xen trace buffers: disabled
> > (XEN) Std. Loglevel: Errors and warnings
> > (XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
> > (XEN) Xen is relinquishing VGA console.
> > (XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to
> switch
> > input to Xen)
> > (XEN) Freed 172kB init memory.
> > (XEN) traps.c:2333:d0 Domain attempted WRMSR 000000000000008b
> from
> > 00000012:00000000 to 00000000:00000000.
> >
> > - Valtteri
> >
> >
> > On Mon, Oct 01, 2012 at 09:12:50PM +0300, Valtteri Kiviniemi
> wrote:
> > > Hi,
> > >
> > > Lowering memory or vcpu's does not help, problem is the
> same. I
> > originally
> > > installed Xen 4.2.0 and the problem was same on that too.
> Then I
> > > downgraded back to 4.0.4 since I thought that this might
> be a bug
> > on
> > > 4.2.0. I have been previously running Windows Server 2008
> R2
> > succesfully
> > > on Xen 4.0.x on different hardware with this same config.
> > Hypervisor is
> > > 64bit and windows is 64bit.
> > >
> > > Any ideas what to try next?
> > >
> >
> > What kind of hardware is that?
> >
> > [6][12]xen.org automated testing regularly tests Windows VMs,
> and it works
> > OK there.
> >
> > -- Pasi
> > > Ps. qemu-dm.log is the following:
> > >
> > > domid: 10
> > > config qemu network with xen bridge for tap10.0 xenbr0
> > > Using file /dev/virtuals/ts in read-write mode
> > > Using file /media/iso/windows_server_2008_r2_sp1.iso in
> read-only
> > mode
> > > Watching /local/domain/0/device-model/10/logdirty/cmd
> > > Watching /local/domain/0/device-model/10/command
> > > qemu_map_cache_init nr_buckets = 10000 size 4194304
> > > shared page at pfn feffd
> > > buffered io page at pfn feffb
> > > Guest uuid = 52f19e23-2955-c27d-a22c-60c5d8c60d5a
> > > Time offset set 0
> > > populating video RAM at ff000000
> > > mapping video RAM from ff000000
> > > Register xen platform.
> > > Done register platform.
> > > platform_fixed_ioport: changed ro/rw state of ROM memory
> area.
> > now is rw
> > > state.
> > >
> xs_read(/local/domain/0/device-model/10/xen_extended_power_mgmt):
> > read
> > > error
> > > medium change watch on `hdc' (index: 1):
> > > /media/iso/windows_server_2008_r2_sp1.iso
> > > I/O request not ready: 0, ptr: 0, port: 0, data: 0, count:
> 0,
> > size: 0
> > > Log-dirty: no command yet.
> > > xs_read(/local/domain/10/log-throttling): read error
> > > qemu: ignoring not-understood drive
> > `/local/domain/10/log-throttling'
> > > medium change watch on `/local/domain/10/log-throttling' -
> > unknown device,
> > > ignored
> > > cirrus vga map change while on lfb mode
> > > mapping vram to f0000000 - f0400000
> > > platform_fixed_ioport: changed ro/rw state of ROM memory
> area.
> > now is rw
> > > state.
> > > platform_fixed_ioport: changed ro/rw state of ROM memory
> area.
> > now is ro
> > > state.
> > >
> > >
> > > On Mon, Oct 01, 2012 at 07:23:44PM +0300, Valtteri
> Kiviniemi
> > wrote:
> > > > Hi,
> > > >
> > > > I have tried other config files, but the problem is
> the
> > same. At
> > > the
> > > > moment I'm using a config file from another server
> where I
> > have a
> > > working
> > > > Windows Server 2008 R2 installation, so I dont
> think that
> > there is
> > > > anything wrong with my config:
> > > >
> > >
> > > Did you try with less vcpus, for example 2 ?
> > > how about with less memory, say 2 GB ?
> > >
> > > Did you try with later Xen versions? Is that a 32bit
> Xen, or
> > 64bit Xen
> > > hypervisor?
> > >
> > > -- Pasi
> > > > kernel = "/usr/lib/xen/boot/hvmloader"
> > > > builder = "hvm"
> > > > shadow_memory = "8"
> > > > memory = "4096"
> > > > name = "ts"
> > > > vcpus = "8"
> > > > cpus = ["0", "1", "2", "3", "4", "5", "6", "7"]
> > > > pae = "1"
> > > > acpi = "1"
> > > > apic = "1"
> > > > vfb = [ 'type=vnc, vnclisten=10.100.100.50,
> vncpasswd=xxx'
> > ]
> > > > xen_extended_power_mgmt = "0"
> > > > vif = [ "type=ioemu, mac=00:16:3e:d7:d7:5d,
> bridge=xenbr0"
> > ]
> > > > disk = [ "phy:/dev/virtuals/ts,hda,w",
> > > >
> > "file:/media/iso/windows_server_2008_r2_sp1.iso,hdc:cdrom,r" ]
> > > > >
> > > > >
> > > > >
> > > > viridian = "1"
> > > > device_model = "/usr/lib/xen/bin/qemu-dm"
> > > > boot = "dc"
> > > > snapshot = "0"
> > > > vncconsole = "1"
> > > > sdl = "0"
> > > > opengl = "0"
> > > > vnc = "1"
> > > > nographic = "0"
> > > > stdvga = "0"
> > > > tsc_mode = "1"
> > > > monitor = "0"
> > > > localtime = "1"
> > > > usb = "0"
> > > > keymap = "fi"
> > > > xen_platform_pci = "1"
> > > > pci_msitranslate = "1"
> > > > pci_power_mgmt = "0"
> > > >
> > > > 2012/10/1 Pasi Kärkkäinen
> > > >
> > > > On Mon, Oct 01, 2012 at 06:46:08PM +0300,
> Valtteri
> > Kiviniemi
> > > wrote:
> > > > > Hi,
> > > > >
> > > > > Yes, I have viridian=1 on my domU config.
> > > > >
> > > >
> > > > Try with some known good domU configfile.
> > > >
> > > > -- Pasi
> > > > > 2012/10/1 Pasi Kärkkäinen
> > <[1][2][3][9][15]pasik@xxxxxx>
> > > > >
> > > > > On Mon, Oct 01, 2012 at 05:06:53PM +0300,
> > Valtteri
> > > Kiviniemi
> > > > wrote:
> > > > > > Hi,
> > > > > >
> > > > > > I'm now using 3.6.0 and can't
> reproduce that
> > crash
> > > anymore,
> > > > so it
> > > > > seems
> > > > > > that it was a kernel bug.
> > > > > >
> > > > >
> > > > > OK.
> > > > > > However I'm still getting black
> screen on
> > VNC
> > > > > > when trying to install Windows Server
> 2008
> > R2. I can
> > > see the
> > > > > "windows is
> > > > > > loading files" screen but after the
> > installer starts
> > > the VNC
> > > > > display goes
> > > > > > black.
> > > > > >
> > > > > > Any ideas?
> > > > > >
> > > > >
> > > > > Do you have viridian=1 specified for the
> windows
> > vm?
> > > > >
> > > > > -- Pasi
> > > > >
> > > > > > - Valtteri
> > > > > >
> > > > > > 2012/10/1 Pasi Kärkkäinen
> > > > > >
> > > > > > On Sun, Sep 30, 2012 at 11:18:03PM
> +0300,
> > Valtteri
> > > > Kiviniemi
> > > > > wrote:
> > > > > > > Hi,
> > > > > > >
> > > > > >
> > > > > > Hello,
> > > > > > > I'm trying to get Windows
> Server 2008
> > R2
> > > installation
> > > > > booting on
> > > > > > Xen
> > > > > > > 4.0.4. Using the following
> config:
> > > > > > >
> > > > > >
> > > > > > <snip>
> > > > > > >
> > > > > > > The domU will start booting
> just
> > fine, but
> > > after a
> > > > few
> > > > > minutes the
> > > > > > VNC
> > > > > > > screen goes black. After that
> when
> > typing "xm
> > > destroy
> > > > ts" it
> > > > > will
> > > > > > trigger
> > > > > > > a kernel BUG:
> > > > > > >
> > > > > > > BUG: unable to handle kernel
> NULL
> > pointer
> > > dereference
> > > > at
> > > > > > 0000000000000030
> > > > > > > IP: [<ffffffff810c50c4>]
> > iput+0x3e/0x195
> > > > > > > PGD 0
> > > > > > > Oops: 0000 [#1] SMP
> > > > > > > CPU 6
> > > > > > > Pid: 3571, comm: qemu-dm Not
> tainted
> > > 3.5.0-dom0 #1
> > > > > >
> > > > > > First of all upgrade to latest
> 3.5.x Linux
> > kernel
> > > release
> > > > .. so
> > > > > at least
> > > > > > 3.5.4.
> > > > > >
> > > > > > -- Pasi
> > > > > >
> > > > > > > /DQ77MK
> > > > > > > RIP: e030:[<ffffffff810c50c4>]
> > > [<ffffffff810c50c4>]
> > > > > > iput+0x3e/0x195
> > > > > > > RSP: e02b:ffff8800389ffbf8
> EFLAGS:
> > 00010246
> > > > > > > RAX: 0000000000000001 RBX:
> > ffff8800377b0720
> > > RCX:
> > > > > ffff8800501c0000
> > > > > > > RDX: ffff8800501c0000 RSI:
> > ffff8800377b0790
> > > RDI:
> > > > > ffff8800377b0790
> > > > > > > RBP: 0000000000000000 R08:
> > ffffffff815cdd00
> > > R09:
> > > > > 0000000000000016
> > > > > > > R10: fefefefefefefeff R11:
> > ffff8800377b0400
> > > R12:
> > > > > 00000001000a3e0c
> > > > > > > R13: 0000000000000000 R14:
> > 00000001000a3e0c
> > > R15:
> > > > > ffff8800389ffc28
> > > > > > > FS: 00007f1af70a8700(0000)
> > > GS:ffff880050180000(0000)
> > > > > > > knlGS:0000000000000000
> > > > > > > CS: e033 DS: 0000 ES: 0000
> CR0:
> > > 000000008005003b
> > > > > > > CR2: 0000000000000030 CR3:
> > 000000000156d000
> > > CR4:
> > > > > 0000000000002660
> > > > > > > DR0: 0000000000000000 DR1:
> > 0000000000000000
> > > DR2:
> > > > > 0000000000000000
> > > > > > > DR3: 0000000000000000 DR6:
> > 00000000ffff0ff0
> > > DR7:
> > > > > 0000000000000400
> > > > > > > Process qemu-dm (pid: 3571,
> > threadinfo
> > > > ffff8800389fe000,
> > > > > task
> > > > > > > ffff88003a721260)
> > > > > > > Stack:
> > > > > > > ffff88003a6d6400
> ffff8800377b0000
> > > 00000001000a3e0c
> > > > > > ffffffff8133ce8f
> > > > > > > ffff8800377b0400
> ffffffff8134b6cd
> > > ffff8800389ffc28
> > > > > > ffff8800389ffc28
> > > > > > > ffff8800377b00f8
> ffff8800377b0680
> > > ffff880038cdcd60
> > > > > > ffff8800377b0000
> > > > > > > Call Trace:
> > > > > > > [<ffffffff8133ce8f>] ?
> > > sk_release_kernel+0x23/0x39
> > > > > > > [<ffffffff8134b6cd>] ?
> > > netdev_run_todo+0x1e9/0x206
> > > > > > > [<ffffffff8129798f>] ?
> > > tun_chr_close+0x4c/0x7b
> > > > > > > [<ffffffff810b39d3>] ?
> > fput+0xe4/0x1c5
> > > > > > > [<ffffffff810b202c>] ?
> > filp_close+0x61/0x68
> > > > > > > [<ffffffff81035e62>] ?
> > > put_files_struct+0x62/0xb9
> > > > > > > [<ffffffff81036374>] ?
> > do_exit+0x24a/0x74c
> > > > > > > [<ffffffff81036906>] ?
> > > do_group_exit+0x6b/0x9d
> > > > > > > [<ffffffff8103ea0b>] ?
> > > > get_signal_to_deliver+0x449/0x46e
> > > > > > > [<ffffffff81009fa5>] ?
> > do_signal+0x28/0x4c4
> > > > > > > [<ffffffff81027079>] ?
> > > > pvclock_clocksource_read+0x48/0xbf
> > > > > > > [<ffffffff8105b745>] ?
> > ktime_get_ts+0x66/0xa8
> > > > > > > [<ffffffff810bfb18>] ?
> > > > poll_select_copy_remaining+0xe0/0xf5
> > > > > > > [<ffffffff8100a48d>] ?
> > > do_notify_resume+0x3b/0x74
> > > > > > > [<ffffffff81411a70>] ?
> > int_signal+0x12/0x17
> > > > > > > Code: 00 00 00 40 74 02 0f 0b
> 48 8d
> > 77 70 48
> > > 8d bf 08
> > > > 01 00
> > > > > 00 e8
> > > > > > 8b 71 10
> > > > > > > 00 85 c0 0f 84 5d 01 00 00 48
> 8b 6b
> > 18 f6 83
> > > 80 00 00
> > > > 00 08
> > > > > <4c> 8b
> > > > > > 65 30
> > > > > > > 74 11 be 68 05 00 00 48 c7 c7
> 8e df
> > 4f 81 e8
> > > bb d0
> > > > > > > RIP [<ffffffff810c50c4>]
> > iput+0x3e/0x195
> > > > > > > RSP <ffff8800389ffbf8>
> > > > > > > CR2: 0000000000000030
> > > > > > > ---[ end trace
> 67cc1654658fedcc ]---
> > > > > > > Fixing recursive fault but
> reboot is
> > needed!
> > > > > > >
> > > > > > > I also tested Xen 4.2.0 and
> problem
> > is the
> > > same. So
> > > > is this
> > > > > a Xen
> > > > > > bug or a
> > > > > > > kernel bug? I am running
> vanilla
> > > > > 3.5.0 and
> > > > > > my
> > > > > > > hardware is Intel Core i7-3770
> CPU
> > and Intel
> > > DQ77MK
> > > > > motherboard
> > > > > > with
> > > > > > > latest bios.
> > > > > > >
> > > > > > > Best regards,
> > > > > > > Valtteri Kiviniemi
> > > > > > >
> > > > > > > References
> > > > > > >
> > > > > > > Visible links
> > > > > > > 1.
> [3][4][5][6][12][18]http://kernel.org/
> > > > > >
> > > > > > >
> > _______________________________________________
> > > > > > > Xen-devel mailing list
> > > > > > >
> [4][5][6][7][13][19]Xen-devel@xxxxxxxxxxxxx
> > > > > > >
> > [5][6][7][8][14][20]http://lists.xen.org/xen-devel
> > > > > >
> > > > > > References
> > > > > >
> > > > > > Visible links
> > > > > > 1.
> mailto:[7][8][9][15][21]pasik@xxxxxx
> > > > > > 2.
> [8][9][10][16][22]http://kernel.org/
> > > > > > 3.
> [9][10][11][17][23]http://kernel.org/
> > > > > > 4.
> > mailto:[10][11][12][18][24]Xen-devel@xxxxxxxxxxxxx
> > > > > > 5.
> > [11][12][13][19][25]http://lists.xen.org/xen-devel
> > > > >
> > > > > References
> > > > >
> > > > > Visible links
> > > > > 1. mailto:[13][14][20][26]pasik@xxxxxx
> > > > > 2. mailto:[14][15][21][27]pasik@xxxxxx
> > > > > 3. [15][16][22][28]http://kernel.org/
> > > > > 4. [16][17][23][29]http://kernel.org/
> > > > > 5.
> mailto:[17][18][24][30]Xen-devel@xxxxxxxxxxxxx
> > > > > 6.
> [18][19][25][31]http://lists.xen.org/xen-devel
> > > > > 7. mailto:[19][20][26][32]pasik@xxxxxx
> > > > > 8. [20][21][27][33]http://kernel.org/
> > > > > 9. [21][22][28][34]http://kernel.org/
> > > > > 10.
> mailto:[22][23][29][35]Xen-devel@xxxxxxxxxxxxx
> > > > > 11.
> [23][24][30][36]http://lists.xen.org/xen-devel
> > > >
> > > > References
> > > >
> > > > Visible links
> > > > 1. mailto:[25][31][37]pasik@xxxxxx
> > > > 2. mailto:[26][32][38]pasik@xxxxxx
> > > > 3. mailto:[27][33][39]pasik@xxxxxx
> > > > 4. [28][34][40]http://kernel.org/
> > > > 5. [29][35][41]http://kernel.org/
> > > > 6. mailto:[30][36][42]Xen-devel@xxxxxxxxxxxxx
> > > > 7. [31][37][43]http://lists.xen.org/xen-devel
> > > > 8. mailto:[32][38][44]pasik@xxxxxx
> > > > 9. [33][39][45]http://kernel.org/
> > > > 10. [34][40][46]http://kernel.org/
> > > > 11. mailto:[35][41][47]Xen-devel@xxxxxxxxxxxxx
> > > > 12. [36][42][48]http://lists.xen.org/xen-devel
> > > > 13. mailto:[37][43][49]pasik@xxxxxx
> > > > 14. mailto:[38][44][50]pasik@xxxxxx
> > > > 15. [39][45][51]http://kernel.org/
> > > > 16. [40][46][52]http://kernel.org/
> > > > 17. mailto:[41][47][53]Xen-devel@xxxxxxxxxxxxx
> > > > 18. [42][48][54]http://lists.xen.org/xen-devel
> > > > 19. mailto:[43][49][55]pasik@xxxxxx
> > > > 20. [44][50][56]http://kernel.org/
> > > > 21. [45][51][57]http://kernel.org/
> > > > 22. mailto:[46][52][58]Xen-devel@xxxxxxxxxxxxx
> > > > 23. [47][53][59]http://lists.xen.org/xen-devel
> > >
> > > References
> > >
> > > Visible links
> > > 1. mailto:[54][60]pasik@xxxxxx
> > > 2. mailto:[55][61]pasik@xxxxxx
> > > 3. mailto:[56][62]pasik@xxxxxx
> > > 4. mailto:[57][63]pasik@xxxxxx
> > > 5. [58][64]http://kernel.org/
> > > 6. [59][65]http://kernel.org/
> > > 7. mailto:[60][66]Xen-devel@xxxxxxxxxxxxx
> > > 8. [61][67]http://lists.xen.org/xen-devel
> > > 9. mailto:[62][68]pasik@xxxxxx
> > > 10. [63][69]http://kernel.org/
> > > 11. [64][70]http://kernel.org/
> > > 12. mailto:[65][71]Xen-devel@xxxxxxxxxxxxx
> > > 13. [66][72]http://lists.xen.org/xen-devel
> > > 14. mailto:[67][73]pasik@xxxxxx
> > > 15. mailto:[68][74]pasik@xxxxxx
> > > 16. [69][75]http://kernel.org/
> > > 17. [70][76]http://kernel.org/
> > > 18. mailto:[71][77]Xen-devel@xxxxxxxxxxxxx
> > > 19. [72][78]http://lists.xen.org/xen-devel
> > > 20. mailto:[73][79]pasik@xxxxxx
> > > 21. [74][80]http://kernel.org/
> > > 22. [75][81]http://kernel.org/
> > > 23. mailto:[76][82]Xen-devel@xxxxxxxxxxxxx
> > > 24. [77][83]http://lists.xen.org/xen-devel
> > > 25. mailto:[78][84]pasik@xxxxxx
> > > 26. mailto:[79][85]pasik@xxxxxx
> > > 27. mailto:[80][86]pasik@xxxxxx
> > > 28. [81][87]http://kernel.org/
> > > 29. [82][88]http://kernel.org/
> > > 30. mailto:[83][89]Xen-devel@xxxxxxxxxxxxx
> > > 31. [84][90]http://lists.xen.org/xen-devel
> > > 32. mailto:[85][91]pasik@xxxxxx
> > > 33. [86][92]http://kernel.org/
> > > 34. [87][93]http://kernel.org/
> > > 35. mailto:[88][94]Xen-devel@xxxxxxxxxxxxx
> > > 36. [89][95]http://lists.xen.org/xen-devel
> > > 37. mailto:[90][96]pasik@xxxxxx
> > > 38. mailto:[91][97]pasik@xxxxxx
> > > 39. [92][98]http://kernel.org/
> > > 40. [93][99]http://kernel.org/
> > > 41. mailto:[94][100]Xen-devel@xxxxxxxxxxxxx
> > > 42. [95][101]http://lists.xen.org/xen-devel
> > > 43. mailto:[96][102]pasik@xxxxxx
> > > 44. [97][103]http://kernel.org/
> > > 45. [98][104]http://kernel.org/
> > > 46. mailto:[99][105]Xen-devel@xxxxxxxxxxxxx
> > > 47. [100][106]http://lists.xen.org/xen-devel
> >
> > References
> >
> > Visible links
> > 1. mailto:[107]kiviniemi.valtteri@xxxxxxxxx
> > 2. [108]http://ark.intel.com/products/65719/
> > 3.
> [109]http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dq77mk.html
> > 4. mailto:[110]root@xxxxxxxxxxxx
> > 5. mailto:[111]pasik@xxxxxx
> > 6. [112]http://xen.org/
> > 7. mailto:[113]pasik@xxxxxx
> > 8. mailto:[114]pasik@xxxxxx
> > 9. mailto:[115]pasik@xxxxxx
> > 10. mailto:[116]pasik@xxxxxx
> > 11. [117]http://kernel.org/
> > 12. [118]http://kernel.org/
> > 13. mailto:[119]Xen-devel@xxxxxxxxxxxxx
> > 14. [120]http://lists.xen.org/xen-devel
> > 15. mailto:[121]pasik@xxxxxx
> > 16. [122]http://kernel.org/
> > 17. [123]http://kernel.org/
> > 18. mailto:[124]Xen-devel@xxxxxxxxxxxxx
> > 19. [125]http://lists.xen.org/xen-devel
> > 20. mailto:[126]pasik@xxxxxx
> > 21. mailto:[127]pasik@xxxxxx
> > 22. [128]http://kernel.org/
> > 23. [129]http://kernel.org/
> > 24. mailto:[130]Xen-devel@xxxxxxxxxxxxx
> > 25. [131]http://lists.xen.org/xen-devel
> > 26. mailto:[132]pasik@xxxxxx
> > 27. [133]http://kernel.org/
> > 28. [134]http://kernel.org/
> > 29. mailto:[135]Xen-devel@xxxxxxxxxxxxx
> > 30. [136]http://lists.xen.org/xen-devel
> > 31. mailto:[137]pasik@xxxxxx
> > 32. mailto:[138]pasik@xxxxxx
> > 33. mailto:[139]pasik@xxxxxx
> > 34. [140]http://kernel.org/
> > 35. [141]http://kernel.org/
> > 36. mailto:[142]Xen-devel@xxxxxxxxxxxxx
> > 37. [143]http://lists.xen.org/xen-devel
> > 38. mailto:[144]pasik@xxxxxx
> > 39. [145]http://kernel.org/
> > 40. [146]http://kernel.org/
> > 41. mailto:[147]Xen-devel@xxxxxxxxxxxxx
> > 42. [148]http://lists.xen.org/xen-devel
> > 43. mailto:[149]pasik@xxxxxx
> > 44. mailto:[150]pasik@xxxxxx
> > 45. [151]http://kernel.org/
> > 46. [152]http://kernel.org/
> > 47. mailto:[153]Xen-devel@xxxxxxxxxxxxx
> > 48. [154]http://lists.xen.org/xen-devel
> > 49. mailto:[155]pasik@xxxxxx
> > 50. [156]http://kernel.org/
> > 51. [157]http://kernel.org/
> > 52. mailto:[158]Xen-devel@xxxxxxxxxxxxx
> > 53. [159]http://lists.xen.org/xen-devel
> > 54. mailto:[160]pasik@xxxxxx
> > 55. mailto:[161]pasik@xxxxxx
> > 56. mailto:[162]pasik@xxxxxx
> > 57. mailto:[163]pasik@xxxxxx
> > 58. [164]http://kernel.org/
> > 59. [165]http://kernel.org/
> > 60. mailto:[166]Xen-devel@xxxxxxxxxxxxx
> > 61. [167]http://lists.xen.org/xen-devel
> > 62. mailto:[168]pasik@xxxxxx
> > 63. [169]http://kernel.org/
> > 64. [170]http://kernel.org/
> > 65. mailto:[171]Xen-devel@xxxxxxxxxxxxx
> > 66. [172]http://lists.xen.org/xen-devel
> > 67. mailto:[173]pasik@xxxxxx
> > 68. mailto:[174]pasik@xxxxxx
> > 69. [175]http://kernel.org/
> > 70. [176]http://kernel.org/
> > 71. mailto:[177]Xen-devel@xxxxxxxxxxxxx
> > 72. [178]http://lists.xen.org/xen-devel
> > 73. mailto:[179]pasik@xxxxxx
> > 74. [180]http://kernel.org/
> > 75. [181]http://kernel.org/
> > 76. mailto:[182]Xen-devel@xxxxxxxxxxxxx
> > 77. [183]http://lists.xen.org/xen-devel
> > 78. mailto:[184]pasik@xxxxxx
> > 79. mailto:[185]pasik@xxxxxx
> > 80. mailto:[186]pasik@xxxxxx
> > 81. [187]http://kernel.org/
> > 82. [188]http://kernel.org/
> > 83. mailto:[189]Xen-devel@xxxxxxxxxxxxx
> > 84. [190]http://lists.xen.org/xen-devel
> > 85. mailto:[191]pasik@xxxxxx
> > 86. [192]http://kernel.org/
> > 87. [193]http://kernel.org/
> > 88. mailto:[194]Xen-devel@xxxxxxxxxxxxx
> > 89. [195]http://lists.xen.org/xen-devel
> > 90. mailto:[196]pasik@xxxxxx
> > 91. mailto:[197]pasik@xxxxxx
> > 92. [198]http://kernel.org/
> > 93. [199]http://kernel.org/
> > 94. mailto:[200]Xen-devel@xxxxxxxxxxxxx
> > 95. [201]http://lists.xen.org/xen-devel
> > 96. mailto:[202]pasik@xxxxxx
> > 97. [203]http://kernel.org/
> > 98. [204]http://kernel.org/
> > 99. mailto:[205]Xen-devel@xxxxxxxxxxxxx
> > 100. [206]http://lists.xen.org/xen-devel
>
> References
>
> Visible links
> 1. http://nago.fi/dmesg.txt
> 2. http://nago.fi/qemu-dm.txt
> 3. http://nago.fi/xm-dmesg.txt
> 4. http://nago.fi/domu-config.txt
> 5. http://nago.fi/dom0-config.txt
> 6. mailto:pasik@xxxxxx
> 7. mailto:kiviniemi.valtteri@xxxxxxxxx
> 8. http://ark.intel.com/products/65719/
> 9. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dq77mk.html
> 10. mailto:root@xxxxxxxxxxxx
> 11. mailto:pasik@xxxxxx
> 12. http://xen.org/
> 13. mailto:pasik@xxxxxx
> 16. mailto:pasik@xxxxxx
> 17. http://kernel.org/
> 18. http://kernel.org/
> 19. mailto:Xen-devel@xxxxxxxxxxxxx
> 20. http://lists.xen.org/xen-devel
> 39. mailto:pasik@xxxxxx
> 40. http://kernel.org/
> 41. http://kernel.org/
> 42. mailto:Xen-devel@xxxxxxxxxxxxx
> 43. http://lists.xen.org/xen-devel
> 50. mailto:pasik@xxxxxx
> 51. http://kernel.org/
> 52. http://kernel.org/
> 53. mailto:Xen-devel@xxxxxxxxxxxxx
> 54. http://lists.xen.org/xen-devel
> 55. mailto:pasik@xxxxxx
> 56. http://kernel.org/
> 57. http://kernel.org/
> 58. mailto:Xen-devel@xxxxxxxxxxxxx
> 59. http://lists.xen.org/xen-devel
> 60. mailto:pasik@xxxxxx
> 61. mailto:pasik@xxxxxx
> 62. mailto:pasik@xxxxxx
> 63. mailto:pasik@xxxxxx
> 64. http://kernel.org/
> 65. http://kernel.org/
> 66. mailto:Xen-devel@xxxxxxxxxxxxx
> 67. http://lists.xen.org/xen-devel
> 74. mailto:pasik@xxxxxx
> 75. http://kernel.org/
> 76. http://kernel.org/
> 77. mailto:Xen-devel@xxxxxxxxxxxxx
> 78. http://lists.xen.org/xen-devel
> 79. mailto:pasik@xxxxxx
> 80. http://kernel.org/
> 81. http://kernel.org/
> 82. mailto:Xen-devel@xxxxxxxxxxxxx
> 83. http://lists.xen.org/xen-devel
> 84. mailto:pasik@xxxxxx
> 85. mailto:pasik@xxxxxx
> 86. mailto:pasik@xxxxxx
> 87. http://kernel.org/
> 88. http://kernel.org/
> 89. mailto:Xen-devel@xxxxxxxxxxxxx
> 90. http://lists.xen.org/xen-devel
> 97. mailto:pasik@xxxxxx
> 98. http://kernel.org/
> 99. http://kernel.org/
> 100. mailto:Xen-devel@xxxxxxxxxxxxx
> 101. http://lists.xen.org/xen-devel
> 102. mailto:pasik@xxxxxx
> 103. http://kernel.org/
> 104. http://kernel.org/
> 105. mailto:Xen-devel@xxxxxxxxxxxxx
> 106. http://lists.xen.org/xen-devel
> 107. mailto:kiviniemi.valtteri@xxxxxxxxx
> 108. http://ark.intel.com/products/65719/
> 109. http://www.intel.com/content/www/us/en/motherboards/desktop-motherboards/desktop-board-dq77mk.html
> 110. mailto:root@xxxxxxxxxxxx
> 111. mailto:pasik@xxxxxx
> 112. http://xen.org/
> 113. mailto:pasik@xxxxxx
> 114. mailto:pasik@xxxxxx
> 115. mailto:pasik@xxxxxx
> 116. mailto:pasik@xxxxxx
> 117. http://kernel.org/
> 118. http://kernel.org/
> 119. mailto:Xen-devel@xxxxxxxxxxxxx
> 120. http://lists.xen.org/xen-devel
> 121. mailto:pasik@xxxxxx
> 122. http://kernel.org/
> 123. http://kernel.org/
> 124. mailto:Xen-devel@xxxxxxxxxxxxx
> 125. http://lists.xen.org/xen-devel
> 126. mailto:pasik@xxxxxx
> 127. mailto:pasik@xxxxxx
> 128. http://kernel.org/
> 129. http://kernel.org/
> 130. mailto:Xen-devel@xxxxxxxxxxxxx
> 131. http://lists.xen.org/xen-devel
> 132. mailto:pasik@xxxxxx
> 133. http://kernel.org/
> 134. http://kernel.org/
> 135. mailto:Xen-devel@xxxxxxxxxxxxx
> 136. http://lists.xen.org/xen-devel
> 137. mailto:pasik@xxxxxx
> 138. mailto:pasik@xxxxxx
> 139. mailto:pasik@xxxxxx
> 140. http://kernel.org/
> 141. http://kernel.org/
> 142. mailto:Xen-devel@xxxxxxxxxxxxx
> 143. http://lists.xen.org/xen-devel
> 144. mailto:pasik@xxxxxx
> 145. http://kernel.org/
> 146. http://kernel.org/
> 147. mailto:Xen-devel@xxxxxxxxxxxxx
> 148. http://lists.xen.org/xen-devel
> 149. mailto:pasik@xxxxxx
> 150. mailto:pasik@xxxxxx
> 151. http://kernel.org/
> 152. http://kernel.org/
> 153. mailto:Xen-devel@xxxxxxxxxxxxx
> 154. http://lists.xen.org/xen-devel
> 155. mailto:pasik@xxxxxx
> 156. http://kernel.org/
> 157. http://kernel.org/
> 158. mailto:Xen-devel@xxxxxxxxxxxxx
> 159. http://lists.xen.org/xen-devel
> 160. mailto:pasik@xxxxxx
> 161. mailto:pasik@xxxxxx
> 162. mailto:pasik@xxxxxx
> 163. mailto:pasik@xxxxxx
> 164. http://kernel.org/
> 165. http://kernel.org/
> 166. mailto:Xen-devel@xxxxxxxxxxxxx
> 167. http://lists.xen.org/xen-devel
> 168. mailto:pasik@xxxxxx
> 169. http://kernel.org/
> 170. http://kernel.org/
> 171. mailto:Xen-devel@xxxxxxxxxxxxx
> 172. http://lists.xen.org/xen-devel
> 173. mailto:pasik@xxxxxx
> 174. mailto:pasik@xxxxxx
> 175. http://kernel.org/
> 176. http://kernel.org/
> 177. mailto:Xen-devel@xxxxxxxxxxxxx
> 178. http://lists.xen.org/xen-devel
> 179. mailto:pasik@xxxxxx
> 180. http://kernel.org/
> 181. http://kernel.org/
> 182. mailto:Xen-devel@xxxxxxxxxxxxx
> 183. http://lists.xen.org/xen-devel
> 184. mailto:pasik@xxxxxx
> 185. mailto:pasik@xxxxxx
> 186. mailto:pasik@xxxxxx
> 187. http://kernel.org/
> 188. http://kernel.org/
> 189. mailto:Xen-devel@xxxxxxxxxxxxx
> 190. http://lists.xen.org/xen-devel
> 191. mailto:pasik@xxxxxx
> 192. http://kernel.org/
> 193. http://kernel.org/
> 194. mailto:Xen-devel@xxxxxxxxxxxxx
> 195. http://lists.xen.org/xen-devel
> 196. mailto:pasik@xxxxxx
> 197. mailto:pasik@xxxxxx
> 198. http://kernel.org/
> 199. http://kernel.org/
> 200. mailto:Xen-devel@xxxxxxxxxxxxx
> 201. http://lists.xen.org/xen-devel
> 202. mailto:pasik@xxxxxx
> 203. http://kernel.org/
> 204. http://kernel.org/
> 205. mailto:Xen-devel@xxxxxxxxxxxxx
> 206. http://lists.xen.org/xen-devel
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