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[Xen-devel] [BUG] pci-passthrough generates "xen:events: Failed to obtain physical IRQ" for some devices




Xen developers,

After an upgrade of my Debian Jessie dom0 and domUs, my passthroughed
NIC stopped working.
This bug was probably introduced in Debian Jessie sometime
between 2015-12-30 and 2016-01-08 as 2015-12-30 as 2015-12-30 was the
last time I upgraded without any problems according to my dpkg.log.

This bug has also been reported to Debian Bug
(https://bugs.debian.org/810379), where I got instructions to contact you
directly.
The Debian Bug List is CC'd to keep the Debian Bug in the loop.


I created a new jessie domU (named "bug") and tried to passthrough some
PCI devices and found that both USB3 host controller and tg3 NIC generated
these lines in domU dmesg:

xen:events: Failed to obtain physical IRQ 31
xen:events: Failed to obtain physical IRQ 32
xen:events: Failed to obtain physical IRQ 33

And from the dom0 "xl dmesg":
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d0: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN faba0
(XEN) mm.c:812: d0: Forcing read-only access to MFN faba0


domU "bug" "lspci -vn":
00:00.1 0200: 14e4:165f
    Subsystem: 103c:2133
    Flags: bus master, fast devsel, latency 0, IRQ 30
    Memory at fabc0000 (64-bit, prefetchable) [size=64K]
    Memory at fabb0000 (64-bit, prefetchable) [size=64K]
    Memory at faba0000 (64-bit, prefetchable) [size=64K]
    Expansion ROM at <ignored> [disabled]
    Capabilities: [48] Power Management version 3
    Capabilities: [50] Vital Product Data
    Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
    Capabilities: [a0] MSI-X: Enable+ Count=17 Masked-
    Capabilities: [ac] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [13c] Device Serial Number 00-00-34-64-a9-9a-a8-b1
    Capabilities: [150] Power Budgeting <?>
    Capabilities: [160] Virtual Channel
    Kernel driver in use: tg3

00:01.0 0c03: 1912:0014 (rev 03) (prog-if 30 [XHCI])
    Subsystem: 103c:1996
    Flags: bus master, fast devsel, latency 0, IRQ 29
    Memory at fbff0000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: [50] Power Management version 3
    Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
    Capabilities: [90] MSI-X: Enable+ Count=8 Masked-
    Capabilities: [a0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [150] Latency Tolerance Reporting
    Kernel driver in use: xhci_hcd

domU "bug" "cat /proc/interrupts":
     ÂCPU0   Â
Â16:   Â25114 Âxen-percpu-virq   Âtimer0
Â17:     Â0 Âxen-percpu-ipi    resched0
Â18:     Â0 Âxen-percpu-ipi    callfunc0
Â19:     Â0 Âxen-percpu-virq   Âdebug0
Â20:     Â0 Âxen-percpu-ipi    callfuncsingle0
Â21:     Â0 Âxen-percpu-ipi    irqwork0
Â22:    Â473  xen-dyn-event   xenbus
Â23:     96  xen-dyn-event   hvc_console
Â24:    8811  xen-dyn-event   blkif
Â25:    Â255  xen-dyn-event   blkif
Â26:    3045  xen-dyn-event   eth0-q0-tx
Â27:    5650  xen-dyn-event   eth0-q0-rx
Â28:     93  xen-dyn-event   pcifront
Â31: Â Â Â Â Â0 Âxen-pirq-pcifront-msi-x Âxhci_hcd
Â32: Â Â Â Â Â0 Âxen-pirq-pcifront-msi-x Âxhci_hcd
Â33: Â Â Â Â Â0 Âxen-pirq-pcifront-msi-x Âeth1
NMI: Â Â Â Â Â0 Â Non-maskable interrupts
LOC: Â Â Â Â Â0 Â Local timer interrupts
SPU: Â Â Â Â Â0 Â Spurious interrupts
PMI: Â Â Â Â Â0 Â Performance monitoring interrupts
IWI: Â Â Â Â Â0 Â IRQ work interrupts
RTR: Â Â Â Â Â0 Â APIC ICR read retries
RES: Â Â Â Â Â0 Â Rescheduling interrupts
CAL: Â Â Â Â Â0 Â Function call interrupts
TLB: Â Â Â Â Â0 Â TLB shootdowns
TRM: Â Â Â Â Â0 Â Thermal event interrupts
THR: Â Â Â Â Â0 Â Threshold APIC interrupts
MCE: Â Â Â Â Â0 Â Machine check exceptions
MCP: Â Â Â Â Â0 Â Machine check polls
HYP: Â Â Â43966 Â Hypervisor callback interrupts
ERR: Â Â Â Â Â0
MIS: Â Â Â Â Â0

domU "bug" "dmesg":
[ Â Â0.000000] Initializing cgroup subsys cpuset
[ Â Â0.000000] Initializing cgroup subsys cpu
[ Â Â0.000000] Initializing cgroup subsys cpuacct
[ Â Â0.000000] Linux version 3.16.0-4-amd64 (debian-kernel at lists.debian.org) (gcc version 4.8.4 (Debian 4.8.4-1)
[ Â Â0.000000] Command line: root=/dev/xvda2 ro elevator=noop root=/dev/xvda2 ro
[ Â Â0.000000] ACPI in unprivileged domain disabled
[ Â Â0.000000] 1-1 mapping on 8000->100000
[ Â Â0.000000] Set 1015808 page(s) to 1-1 mapping
[ Â Â0.000000] 1-1 mapping on 100000->8000000
[ Â Â0.000000] e820: BIOS-provided physical RAM map:
[ Â Â0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[ Â Â0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[ Â Â0.000000] Xen: [mem 0x0000000000100000-0x0000000007ffffff] usable
[ Â Â0.000000] Xen: [mem 0x0000000008000000-0x00000000f1de3fff] unusable
[ Â Â0.000000] Xen: [mem 0x00000000f1de4000-0x00000000f1dedfff] ACPI data
[ Â Â0.000000] Xen: [mem 0x00000000f1dee000-0x00000000f7ffffff] reserved
[ Â Â0.000000] Xen: [mem 0x00000000fec00000-0x00000000feefffff] reserved
[ Â Â0.000000] Xen: [mem 0x00000000ff800000-0x00000000ffffffff] reserved
[ Â Â0.000000] NX (Execute Disable) protection: active
[ Â Â0.000000] DMI not present or invalid.
[ Â Â0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ Â Â0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ Â Â0.000000] AGP: No AGP bridge found
[ Â Â0.000000] e820: last_pfn = 0x8000 max_arch_pfn = 0x400000000
[ Â Â0.000000] Base memory trampoline at [ffff88000009a000] 9a000 size 24576
[ Â Â0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[ Â Â0.000000] Â[mem 0x00000000-0x000fffff] page 4k
[ Â Â0.000000] init_memory_mapping: [mem 0x07e00000-0x07ffffff]
[ Â Â0.000000] Â[mem 0x07e00000-0x07ffffff] page 4k
[ Â Â0.000000] BRK [0x01b02000, 0x01b02fff] PGTABLE
[ Â Â0.000000] init_memory_mapping: [mem 0x04000000-0x07dfffff]
[ Â Â0.000000] Â[mem 0x04000000-0x07dfffff] page 4k
[ Â Â0.000000] BRK [0x01b03000, 0x01b03fff] PGTABLE
[ Â Â0.000000] BRK [0x01b04000, 0x01b04fff] PGTABLE
[ Â Â0.000000] BRK [0x01b05000, 0x01b05fff] PGTABLE
[ Â Â0.000000] BRK [0x01b06000, 0x01b06fff] PGTABLE
[ Â Â0.000000] BRK [0x01b07000, 0x01b07fff] PGTABLE
[ Â Â0.000000] init_memory_mapping: [mem 0x00100000-0x03ffffff]
[ Â Â0.000000] Â[mem 0x00100000-0x03ffffff] page 4k
[ Â Â0.000000] RAMDISK: [mem 0x01f18000-0x049bffff]
[ Â Â0.000000] NUMA turned off
[ Â Â0.000000] Faking a node at [mem 0x0000000000000000-0x0000000007ffffff]
[ Â Â0.000000] Initmem setup node 0 [mem 0x00000000-0x07ffffff]
[ Â Â0.000000] Â NODE_DATA [mem 0x07fe7000-0x07febfff]
[ Â Â0.000000] Zone ranges:
[ Â Â0.000000] Â DMA Â Â Â[mem 0x00001000-0x00ffffff]
[ Â Â0.000000] Â DMA32 Â Â[mem 0x01000000-0xffffffff]
[  Â0.000000]  Normal  empty
[ Â Â0.000000] Movable zone start for each node
[ Â Â0.000000] Early memory node ranges
[  Â0.000000]  node  0: [mem 0x00001000-0x0009ffff]
[  Â0.000000]  node  0: [mem 0x00100000-0x07ffffff]
[ Â Â0.000000] On node 0 totalpages: 32671
[ Â Â0.000000] Â DMA zone: 56 pages used for memmap
[ Â Â0.000000] Â DMA zone: 21 pages reserved
[ Â Â0.000000] Â DMA zone: 3999 pages, LIFO batch:0
[ Â Â0.000000] Â DMA32 zone: 392 pages used for memmap
[ Â Â0.000000] Â DMA32 zone: 28672 pages, LIFO batch:7
[ Â Â0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[ Â Â0.000000] smpboot: Allowing 1 CPUs, 0 hotplug CPUs
[ Â Â0.000000] nr_irqs_gsi: 16
[ Â Â0.000000] PM: Registered nosave memory: [mem 0x000a0000-0x000fffff]
[ Â Â0.000000] e820: [mem 0xf8000000-0xfebfffff] available for PCI devices
[ Â Â0.000000] Booting paravirtualized kernel on Xen
[ Â Â0.000000] Xen version: 4.4.1 (preserve-AD)
[ Â Â0.000000] setup_percpu: NR_CPUS:512 nr_cpumask_bits:512 nr_cpu_ids:1 nr_node_ids:1
[ Â Â0.000000] PERCPU: Embedded 27 pages/cpu @ffff880007c00000 s80896 r8192 d21504 u2097152
[ Â Â0.000000] pcpu-alloc: s80896 r8192 d21504 u2097152 alloc=1*2097152
[ Â Â0.000000] pcpu-alloc: [0] 0
[  Â0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 32202
[ Â Â0.000000] Policy zone: DMA32
[ Â Â0.000000] Kernel command line: root=/dev/xvda2 ro elevator=noop root=/dev/xvda2 ro
[ Â Â0.000000] PID hash table entries: 512 (order: 0, 4096 bytes)
[ Â Â0.000000] xsave: enabled xstate_bv 0x3, cntxt size 0x240
[ Â Â0.000000] AGP: Checking aperture...
[ Â Â0.000000] AGP: No AGP bridge found
[ Â Â0.000000] Calgary: detecting Calgary via BIOS EBDA area
[ Â Â0.000000] Calgary: Unable to locate Rio Grande table in EBDA - bailing!
[ Â Â0.000000] Memory: 72968K/130684K available (5219K kernel code, 947K rwdata, 1836K rodata, 1204K init, 840K
[ Â Â0.000000] Hierarchical RCU implementation.
[ Â Â0.000000] ÂRCU dyntick-idle grace-period acceleration is enabled.
[ Â Â0.000000] ÂRCU restricting CPUs from NR_CPUS=512 to nr_cpu_ids=1.
[ Â Â0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=1
[ Â Â0.000000] NR_IRQS:33024 nr_irqs:256 16
[ Â Â0.000000] xen:events: Using FIFO-based ABI
[ Â Â0.000000] Console: colour dummy device 80x25
[ Â Â0.000000] console [tty0] enabled
[ Â Â0.000000] console [hvc0] enabled
[ Â Â0.000000] Xen: using vcpuop timer interface
[ Â Â0.000000] installing Xen timer for CPU 0
[ Â Â0.000000] tsc: Detected 2294.838 MHz processor
[ Â Â0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 4589.67 BogoMIPS (lpj=
[ Â Â0.004000] pid_max: default: 32768 minimum: 301
[ Â Â0.004000] Security Framework initialized
[ Â Â0.004000] AppArmor: AppArmor disabled by boot time parameter
[ Â Â0.004000] Yama: disabled by default; enable with sysctl kernel.yama.*
[ Â Â0.004000] Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
[ Â Â0.004000] Inode-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ Â Â0.004000] Mount-cache hash table entries: 512 (order: 0, 4096 bytes)
[ Â Â0.004000] Mountpoint-cache hash table entries: 512 (order: 0, 4096 bytes)
[ Â Â0.004000] Initializing cgroup subsys memory
[ Â Â0.004000] Initializing cgroup subsys devices
[ Â Â0.004000] Initializing cgroup subsys freezer
[ Â Â0.004000] Initializing cgroup subsys net_cls
[ Â Â0.004000] Initializing cgroup subsys blkio
[ Â Â0.004000] Initializing cgroup subsys perf_event
[ Â Â0.004000] Initializing cgroup subsys net_prio
[ Â Â0.004000] ENERGY_PERF_BIAS: Set to 'normal', was 'performance'
ENERGY_PERF_BIAS: View and update with x86_energy_perf_policy(8)
[ Â Â0.004000] CPU: Physical Processor ID: 0
[ Â Â0.004000] CPU: Processor Core ID: 0
[ Â Â0.004000] Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8
Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0
tlb_flushall_shift: 2
[ Â Â0.036441] Freeing SMP alternatives memory: 20K (ffffffff81a1b000 - ffffffff81a20000)
[ Â Â0.040068] ftrace: allocating 21679 entries in 85 pages
[ Â Â0.048193] Performance Events: unsupported p6 CPU model 58 no PMU driver, software events only.
[ Â Â0.050513] x86: Booted up 1 node, 1 CPUs
[ Â Â0.050738] NMI watchdog: disabled (cpu0): hardware events not enabled
[ Â Â0.050849] devtmpfs: initialized
[ Â Â0.055640] pinctrl core: initialized pinctrl subsystem
[ Â Â0.055761] NET: Registered protocol family 16
[ Â Â0.055786] xen:grant_table: Grant tables using version 1 layout
[ Â Â0.055811] Grant table initialized
[ Â Â0.056754] PCI: setting up Xen PCI frontend stub
[ Â Â0.056764] PCI: pci_cache_line_size set to 64 bytes
[ Â Â0.057845] ACPI: Interpreter disabled.
[ Â Â0.057869] xen:balloon: Initialising balloon driver
[ Â Â0.057891] xen_balloon: Initialising balloon driver
[ Â Â0.057891] vgaarb: loaded
[ Â Â0.057891] PCI: System does not support PCI
[ Â Â0.057891] PCI: System does not support PCI
[ Â Â0.060186] Switched to clocksource xen
[ Â Â0.066155] pnp: PnP ACPI: disabled
[ Â Â0.068881] NET: Registered protocol family 2
[ Â Â0.069126] TCP established hash table entries: 1024 (order: 1, 8192 bytes)
[ Â Â0.069142] TCP bind hash table entries: 1024 (order: 2, 16384 bytes)
[ Â Â0.069150] TCP: Hash tables configured (established 1024 bind 1024)
[ Â Â0.069170] TCP: reno registered
[ Â Â0.069178] UDP hash table entries: 256 (order: 1, 8192 bytes)
[ Â Â0.069188] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[ Â Â0.069240] NET: Registered protocol family 1
[ Â Â0.069260] PCI: CLS 0 bytes, default 64
[ Â Â0.069323] Unpacking initramfs...
[ Â Â0.124178] Freeing initrd memory: 43680K (ffff880001f18000 - ffff8800049c0000)
[ Â Â0.126623] platform rtc_cmos: registered platform RTC device (no PNP device found)
[ Â Â0.126711] RAPL PMU detected, hw unit 2^-16 Joules, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovf
[ Â Â0.126757] microcode: CPU0 sig=0x306a9, pf=0x2, revision=0x19
[ Â Â0.126826] microcode: Microcode Update Driver: v2.00 <tigran at aivazian.fsnet.co.uk>, Peter Oruba
[ Â Â0.127132] futex hash table entries: 256 (order: 2, 16384 bytes)
[ Â Â0.127170] audit: initializing netlink subsys (disabled)
[ Â Â0.127196] audit: type=2000 audit(1452265722.038:1): initialized
[ Â Â0.128047] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[ Â Â0.128087] zbud: loaded
[ Â Â0.128295] VFS: Disk quotas dquot_6.5.2
[ Â Â0.128314] Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[ Â Â0.128403] msgmni has been set to 227
[ Â Â0.128778] alg: No test for stdrng (krng)
[ Â Â0.128809] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[ Â Â0.128867] io scheduler noop registered (default)
[ Â Â0.128875] io scheduler deadline registered
[ Â Â0.128912] io scheduler cfq registered
[ Â Â0.128995] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[ Â Â0.129021] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[ Â Â0.129062] intel_idle: does not run on family 6 model 58
[ Â Â0.129466] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[ Â Â0.129819] Linux agpgart interface v0.103
[ Â Â0.129918] i8042: PNP: No PS/2 controller found. Probing ports directly.
[ Â Â1.373182] i8042: No controller found
[ Â Â1.373401] mousedev: PS/2 mouse device common for all mice
[ Â Â1.460855] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[ Â Â1.460918] rtc_cmos: probe of rtc_cmos failed with error -38
[ Â Â1.460953] ledtrig-cpu: registered to indicate activity on CPUs
[ Â Â1.460973] AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel at amd.com>
[ Â Â1.460977] AMD IOMMUv2 functionality not available on this system
[ Â Â1.461076] TCP: cubic registered
[ Â Â1.461097] NET: Registered protocol family 10
[ Â Â1.461286] mip6: Mobile IPv6
[ Â Â1.461295] NET: Registered protocol family 17
[ Â Â1.461303] mpls_gso: MPLS GSO support
[ Â Â1.461310] mce: Unable to init device /dev/mcelog (rc: -5)
[ Â Â1.461463] registered taskstats version 1
[ Â Â1.461516] xenbus_probe_frontend: Device with no driver: device/vbd/51714
[ Â Â1.461521] xenbus_probe_frontend: Device with no driver: device/vbd/51713
[ Â Â1.461524] xenbus_probe_frontend: Device with no driver: device/vif/0
[ Â Â1.461527] xenbus_probe_frontend: Device with no driver: device/pci/0
[ Â Â1.461569] rtc_hctosys: unable to open rtc device (rtc0)
[ Â Â1.461620] PM: Hibernation image not present or could not be loaded.
[ Â Â1.462130] Freeing unused kernel memory: 1204K (ffffffff818ee000 - ffffffff81a1b000)
[ Â Â1.462137] Write protecting the kernel read-only data: 8192k
[ Â Â1.464662] Freeing unused kernel memory: 912K (ffff88000151c000 - ffff880001600000)
[ Â Â1.464765] Freeing unused kernel memory: 212K (ffff8800017cb000 - ffff880001800000)
[ Â Â1.484305] systemd-udevd[58]: starting version 215
[ Â Â1.484846] random: systemd-udevd urandom read with 4 bits of entropy available
[ Â Â1.508462] xen_netfront: Initialising Xen virtual ethernet driver
[ Â Â1.565647] blkfront: xvda2: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enab
[ Â Â1.568041] blkfront: xvda1: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enab
[ Â Â9.699548] EXT4-fs (xvda2): mounted filesystem with ordered data mode. Opts: (null)
[ Â 10.030680] random: nonblocking pool is initialized
[ Â 11.587594] systemd[1]: systemd 215 running in system mode. (+PAM +AUDIT +SELINUX +IMA +SYSVINIT +LIBCRYPTSET
[ Â 11.587689] systemd[1]: Detected virtualization 'xen'.
[ Â 11.587704] systemd[1]: Detected architecture 'x86-64'.
[ Â 12.754742] systemd[1]: Inserted module 'autofs4'
[ Â 12.791362] systemd[1]: Set hostname to <bug>.
[ Â 16.336333] systemd[1]: Cannot add dependency job for unit dbus.socket, ignoring: Unit dbus.socket failed to
[ Â 16.336369] systemd[1]: Cannot add dependency job for unit display-manager.service, ignoring: Unit display-ma
[ Â 16.336879] systemd[1]: Starting Forward Password Requests to Wall Directory Watch.
[ Â 16.337039] systemd[1]: Started Forward Password Requests to Wall Directory Watch.
[ Â 16.337067] systemd[1]: Expecting device dev-hvc0.device...
[ Â 16.337241] systemd[1]: Starting Remote File Systems (Pre).
[ Â 16.337329] systemd[1]: Reached target Remote File Systems (Pre).
[ Â 16.337384] systemd[1]: Starting Arbitrary Executable File Formats File System Automount Point.
[ Â 16.337608] systemd[1]: Set up automount Arbitrary Executable File Formats File System Automount Point.
[ Â 16.337649] systemd[1]: Starting Dispatch Password Requests to Console Directory Watch.
[ Â 16.337733] systemd[1]: Started Dispatch Password Requests to Console Directory Watch.
[ Â 16.337755] systemd[1]: Starting Paths.
[ Â 16.337842] systemd[1]: Reached target Paths.
[ Â 16.337866] systemd[1]: Starting Encrypted Volumes.
[ Â 16.337947] systemd[1]: Reached target Encrypted Volumes.
[ Â 16.337970] systemd[1]: Expecting device dev-xvda1.device...
[ Â 16.338059] systemd[1]: Starting Root Slice.
[ Â 16.338166] systemd[1]: Created slice Root Slice.
[ Â 16.338191] systemd[1]: Starting User and Session Slice.
[ Â 16.338322] systemd[1]: Created slice User and Session Slice.
[ Â 16.338346] systemd[1]: Starting Delayed Shutdown Socket.
[ Â 16.338812] systemd[1]: Listening on Delayed Shutdown Socket.
[ Â 16.338840] systemd[1]: Starting /dev/initctl Compatibility Named Pipe.
[ Â 16.338979] systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
[ Â 16.339002] systemd[1]: Starting Journal Socket (/dev/log).
[ Â 16.339141] systemd[1]: Listening on Journal Socket (/dev/log).
[ Â 16.339175] systemd[1]: Starting udev Kernel Socket.
[ Â 16.339280] systemd[1]: Listening on udev Kernel Socket.
[ Â 16.339311] systemd[1]: Starting udev Control Socket.
[ Â 16.339425] systemd[1]: Listening on udev Control Socket.
[ Â 16.339454] systemd[1]: Starting Journal Socket.
[ Â 16.339594] systemd[1]: Listening on Journal Socket.
[ Â 16.339632] systemd[1]: Starting System Slice.
[ Â 16.339776] systemd[1]: Created slice System Slice.
[ Â 16.339819] systemd[1]: Starting File System Check on Root Device...
[ Â 16.341351] systemd[1]: Starting system-getty.slice.
[ Â 16.341580] systemd[1]: Created slice system-getty.slice.
[ Â 16.341606] systemd[1]: Starting system-serial\x2dgetty.slice.
[ Â 16.341751] systemd[1]: Created slice system-serial\x2dgetty.slice.
[ Â 16.341832] systemd[1]: Starting Increase datagram queue length...
[ Â 16.343890] systemd[1]: Mounting POSIX Message Queue File System...
[ Â 16.349573] systemd[1]: Mounting Debug File System...
[ Â 16.386487] systemd[1]: Started Set Up Additional Binary Formats.
[ Â 16.386567] systemd[1]: Mounting Huge Pages File System...
[ Â 16.388234] systemd[1]: Starting Create list of required static device nodes for the current kernel...
[ Â 16.420891] systemd[1]: Starting Load Kernel Modules...
[ Â 16.422455] systemd[1]: Starting udev Coldplug all Devices...
[ Â 16.423981] systemd[1]: Starting Slices.
[ Â 16.424152] systemd[1]: Reached target Slices.
[ Â 16.526927] systemd[1]: Mounted Huge Pages File System.
[ Â 16.527472] systemd[1]: Mounted POSIX Message Queue File System.
[ Â 16.528053] systemd[1]: Mounted Debug File System.
[ Â 16.539437] systemd[1]: Started Increase datagram queue length.
[ Â 16.539776] systemd[1]: Starting Syslog Socket.
[ Â 16.539873] systemd[1]: Listening on Syslog Socket.
[ Â 16.539901] systemd[1]: Starting Sockets.
[ Â 16.539940] systemd[1]: Reached target Sockets.
[ Â 16.539963] systemd[1]: Starting Journal Service...
[ Â 16.541579] systemd[1]: Started Journal Service.
[ Â 20.334341] systemd-udevd[138]: starting version 215
[ Â 20.905312] EXT4-fs (xvda2): re-mounted. Opts: errors=remount-ro
[ Â 21.199307] pcifront pci-0: Installing PCI frontend
[ Â 21.199334] xen:swiotlb_xen: Warning: only able to allocate 4 MB for software IO TLB
[ Â 21.202593] software IO TLB [mem 0x05800000-0x05c00000] (4MB) mapped at [ffff880005800000-ffff880005bfffff]
[ Â 21.211902] pcifront pci-0: Creating PCI Frontend Bus 0000:00
[ Â 21.211974] pcifront pci-0: PCI host bridge to bus 0000:00
[ Â 21.211982] pci_bus 0000:00: root bus resource [io Â0x0000-0xffff]
[ Â 21.211988] pci_bus 0000:00: root bus resource [mem 0x00000000-0xfffffffff]
[ Â 21.211994] pci_bus 0000:00: root bus resource [bus 00-ff]
[ Â 21.214065] pci 0000:00:01.0: [1912:0014] type 00 class 0x0c0330
[ Â 21.214505] pci 0000:00:01.0: reg 0x10: [mem 0xfbff0000-0xfbff1fff 64bit]
[ Â 21.218500] alg: No test for crc32 (crc32-pclmul)
[ Â 21.234075] pci 0000:00:00.1: [14e4:165f] type 00 class 0x020000
[ Â 21.234630] pci 0000:00:00.1: reg 0x10: [mem 0xfabc0000-0xfabcffff 64bit pref]
[ Â 21.234914] pci 0000:00:00.1: reg 0x18: [mem 0xfabb0000-0xfabbffff 64bit pref]
[ Â 21.235179] pci 0000:00:00.1: reg 0x20: [mem 0xfaba0000-0xfabaffff 64bit pref]
[ Â 21.242805] pcifront pci-0: New device on 0000:00:00.1 found.
[ Â 21.261341] pcifront pci-0: claiming resource 0000:00:01.0/0
[ Â 21.261355] pcifront pci-0: claiming resource 0000:00:00.1/0
[ Â 21.261360] pcifront pci-0: claiming resource 0000:00:00.1/2
[ Â 21.261365] pcifront pci-0: claiming resource 0000:00:00.1/4
[ Â 21.261545] pci 0000:00:01.0: Xen PCI mapped GSI18 to IRQ29
[ Â 21.364943] systemd-journald[124]: Received request to flush runtime journal from PID 1
[ Â 21.584884] input: PC Speaker as /devices/platform/pcspkr/input/input0
[ Â 21.635516] intel_rapl: Found RAPL domain package
[ Â 21.635530] intel_rapl: Found RAPL domain core
[ Â 21.936105] pps_core: LinuxPPS API ver. 1 registered
[ Â 21.936119] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti at linux.it>
[ Â 21.961610] PTP clock support registered
[ Â 22.109201] tg3.c:v3.137 (May 11, 2014)
[ Â 22.109445] tg3 0000:00:00.1: Xen PCI mapped GSI17 to IRQ30
[ Â 22.131432] tg3 0000:00:00.1 eth1: Tigon3 [partno(N/A) rev 5720000] (PCI Express) MAC address 34:64:a9:9a:a8:
[ Â 22.131450] tg3 0000:00:00.1 eth1: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
[ Â 22.131459] tg3 0000:00:00.1 eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
[ Â 22.131466] tg3 0000:00:00.1 eth1: dma_rwctrl[00000001] dma_mask[64-bit]
[ Â 22.154753] usbcore: registered new interface driver usbfs
[ Â 22.155023] usbcore: registered new interface driver hub
[ Â 22.157566] usbcore: registered new device driver usb
[ Â 22.293477] xen:events: xen_bind_pirq_gsi_to_irq: returning irq 29 for gsi 18
[ Â 22.293493] xhci_hcd 0000:00:01.0: Xen PCI mapped GSI18 to IRQ29
[ Â 22.293632] xhci_hcd 0000:00:01.0: xHCI Host Controller
[ Â 22.293645] xhci_hcd 0000:00:01.0: new USB bus registered, assigned bus number 1
[ Â 22.302041] xen:events: Failed to obtain physical IRQ 31
[ Â 22.302064] xen:events: Failed to obtain physical IRQ 32
[ Â 22.302159] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002
[ Â 22.302166] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ Â 22.302172] usb usb1: Product: xHCI Host Controller
[ Â 22.302176] usb usb1: Manufacturer: Linux 3.16.0-4-amd64 xhci_hcd
[ Â 22.302181] usb usb1: SerialNumber: 0000:00:01.0
[ Â 22.302529] hub 1-0:1.0: USB hub found
[ Â 22.302551] hub 1-0:1.0: 2 ports detected
[ Â 22.302686] xhci_hcd 0000:00:01.0: xHCI Host Controller
[ Â 22.302696] xhci_hcd 0000:00:01.0: new USB bus registered, assigned bus number 2
[ Â 22.302750] usb usb2: We don't know the algorithms for LPM for this host, disabling LPM.
[ Â 22.302780] usb usb2: New USB device found, idVendor=1d6b, idProduct=0003
[ Â 22.302786] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
[ Â 22.302792] usb usb2: Product: xHCI Host Controller
[ Â 22.302796] usb usb2: Manufacturer: Linux 3.16.0-4-amd64 xhci_hcd
[ Â 22.302801] usb usb2: SerialNumber: 0000:00:01.0
[ Â 22.303057] hub 2-0:1.0: USB hub found
[ Â 22.303075] hub 2-0:1.0: 2 ports detected
[  22.808901] Adding 262140k swap on /dev/xvda1. Priority:-1 extents:1 across:262140k SSFS
[ Â188.358732] xen:events: Failed to obtain physical IRQ 33
[ Â188.487712] IPv6: ADDRCONF(NETDEV_UP): eth1: link is not ready

The last "xen:events: Failed to obtain physical IRQ 33" is from when I
did a "ifconfig eth1 up" where eth1 is the tg3 NIC.


I also have another domU (referred to as "working" below) with a
passthroughed USB PCI host controller (not USB3), and it works fine.

domU "working" "lspci -vn":
00:00.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 05) (prog-if 20 [EHCI])
ÂÂÂÂÂÂÂ Subsystem: Hewlett-Packard Company Device [103c:330d]
ÂÂÂÂÂÂÂ Flags: bus master, medium devsel, latency 0, IRQ 31
ÂÂÂÂÂÂÂ Memory at facf0000 (32-bit, non-prefetchable) [size=1K]
ÂÂÂÂÂÂÂ Capabilities: [50] Power Management version 2
ÂÂÂÂÂÂÂ Capabilities: [58] Debug port: BAR=1 offset=00a0
ÂÂÂÂÂÂÂ Capabilities: [98] PCI Advanced Features
ÂÂÂÂÂÂÂ Kernel driver in use: ehci-pci


domU "working" "cat /proc/interrupts":
ÂÂÂÂÂÂÂÂÂÂ CPU0ÂÂÂÂÂÂ
Â16:Â 192795228Â xen-percpu-virqÂÂÂÂÂ timer0
Â17:ÂÂÂÂÂÂÂÂÂ 0Â xen-percpu-ipiÂÂÂÂÂÂ resched0
Â18:ÂÂÂÂÂÂÂÂÂ 0Â xen-percpu-ipiÂÂÂÂÂÂ callfunc0
Â19:ÂÂÂÂÂÂÂÂÂ 0Â xen-percpu-virqÂÂÂÂÂ debug0
Â20:ÂÂÂÂÂÂÂÂÂ 0Â xen-percpu-ipiÂÂÂÂÂÂ callfuncsingle0
Â21:ÂÂÂÂ 189700Â xen-percpu-ipiÂÂÂÂÂÂ irqwork0
Â22:ÂÂÂÂÂÂÂ 519ÂÂ xen-dyn-eventÂÂÂÂ xenbus
Â23:ÂÂÂÂ 286767ÂÂ xen-dyn-eventÂÂÂÂ hvc_console
Â24:ÂÂÂ 1028151ÂÂ xen-dyn-eventÂÂÂÂ blkif
Â25:ÂÂÂÂÂÂÂ 361ÂÂ xen-dyn-eventÂÂÂÂ blkif
Â26:ÂÂ 47422278ÂÂ xen-dyn-eventÂÂÂÂ eth0-q0-tx
Â27:ÂÂ 47133612ÂÂ xen-dyn-eventÂÂÂÂ eth0-q0-rx
Â28:ÂÂÂ 3054706ÂÂ xen-dyn-eventÂÂÂÂ eth1-q0-tx
Â29:ÂÂÂ 3436561ÂÂ xen-dyn-eventÂÂÂÂ eth1-q0-rx
Â30:ÂÂÂÂÂÂÂÂ 27ÂÂ xen-dyn-eventÂÂÂÂ pcifront
Â31: 297065876 xen-pirq-pcifront ehci_hcd:usb1
NMI:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Non-maskable interrupts
LOC:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Local timer interrupts
SPU:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Spurious interrupts
PMI:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Performance monitoring interrupts
IWI:ÂÂÂÂ 189700ÂÂ IRQ work interrupts
RTR:ÂÂÂÂÂÂÂÂÂ 0ÂÂ APIC ICR read retries
RES:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Rescheduling interrupts
CAL:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Function call interrupts
TLB:ÂÂÂÂÂÂÂÂÂ 0ÂÂ TLB shootdowns
TRM:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Thermal event interrupts
THR:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Threshold APIC interrupts
MCE:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Machine check exceptions
MCP:ÂÂÂÂÂÂÂÂÂ 0ÂÂ Machine check polls
HYP:Â 582543792ÂÂ Hypervisor callback interrupts
ERR:ÂÂÂÂÂÂÂÂÂ 0
MIS:ÂÂÂÂÂÂÂÂÂ 0



Some other info:

dom0 "grep -vE '^#|^$' /etc/xen/bug.cfg":
bootloader = '/usr/lib/xen-4.4/bin/pygrub'
vcpus    = '1'
memory   Â= '128'
root    Â= '/dev/xvda2 ro'
disk    Â= [
         'phy:/dev/vg_xen/bug-disk,xvda2,w',
         'phy:/dev/vg_xen/bug-swap,xvda1,w',
       ]
name    Â= 'bug'
dhcp    Â= 'dhcp'
vif     = [ 'mac=00:16:3E:99:92:03,bridge=br_home' ]
pci     = [ '03:00.1,permissive=1', '04:00.0,permissive=1' ]
>on_reboot  = 'restart'
on_crash  Â= 'restart'


dom0 "lspci -vnn" for the two failing (03:00.1, 04:00.0) and
the one working (00:1a.0) devices mentioned above:

00:1a.0 USB controller [0c03]: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 [8086:1c2d] (rev 05) (prog-if 20 [EHCI])
ÂÂÂÂÂÂÂ Subsystem: Hewlett-Packard Company Device [103c:330d]
ÂÂÂÂÂÂÂ Flags: bus master, medium devsel, latency 0, IRQ 21
ÂÂÂÂÂÂÂ Memory at facf0000 (32-bit, non-prefetchable) [size=1K]
ÂÂÂÂÂÂÂ Capabilities: [50] Power Management version 2
ÂÂÂÂÂÂÂ Capabilities: [58] Debug port: BAR=1 offset=00a0
ÂÂÂÂÂÂÂ Capabilities: [98] PCI Advanced Features
ÂÂÂÂÂÂÂ Kernel driver in use: pciback

03:00.1 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM5720 Gigabit Ethernet PCIe [14e4:165f]
ÂÂÂÂÂÂÂ Subsystem: Hewlett-Packard Company Device [103c:2133]
ÂÂÂÂÂÂÂ Flags: bus master, fast devsel, latency 0, IRQ 17
ÂÂÂÂÂÂÂ Memory at fabc0000 (64-bit, prefetchable) [size=64K]
ÂÂÂÂÂÂÂ Memory at fabb0000 (64-bit, prefetchable) [size=64K]
ÂÂÂÂÂÂÂ Memory at faba0000 (64-bit, prefetchable) [size=64K]
ÂÂÂÂÂÂÂ Expansion ROM at f8020000 [disabled] [size=128K]
ÂÂÂÂÂÂÂ Capabilities: [48] Power Management version 3
ÂÂÂÂÂÂÂ Capabilities: [50] Vital Product Data
ÂÂÂÂÂÂÂ Capabilities: [58] MSI: Enable- Count=1/8 Maskable- 64bit+
ÂÂÂÂÂÂÂ Capabilities: [a0] MSI-X: Enable- Count=17 Masked-
ÂÂÂÂÂÂÂ Capabilities: [ac] Express Endpoint, MSI 00
ÂÂÂÂÂÂÂ Capabilities: [100] Advanced Error Reporting
ÂÂÂÂÂÂÂ Capabilities: [13c] Device Serial Number 00-00-34-64-a9-9a-a8-b1
ÂÂÂÂÂÂÂ Capabilities: [150] Power Budgeting <?>
ÂÂÂÂÂÂÂ Capabilities: [160] Virtual Channel
ÂÂÂÂÂÂÂ Kernel driver in use: pciback

04:00.0 USB controller [0c03]: Renesas Technology Corp. uPD720201 USB 3.0 Host Controller [1912:0014] (rev 03) (prog-if 30 [XHCI])
ÂÂÂÂÂÂÂ Subsystem: Hewlett-Packard Company Device [103c:1996]
ÂÂÂÂÂÂÂ Flags: bus master, fast devsel, latency 0, IRQ 18
ÂÂÂÂÂÂÂ Memory at fbff0000 (64-bit, non-prefetchable) [size=8K]
ÂÂÂÂÂÂÂ Capabilities: [50] Power Management version 3
ÂÂÂÂÂÂÂ Capabilities: [70] MSI: Enable- Count=1/8 Maskable- 64bit+
ÂÂÂÂÂÂÂ Capabilities: [90] MSI-X: Enable+ Count=8 Masked-
ÂÂÂÂÂÂÂ Capabilities: [a0] Express Endpoint, MSI 00
ÂÂÂÂÂÂÂ Capabilities: [100] Advanced Error Reporting
ÂÂÂÂÂÂÂ Capabilities: [150] Latency Tolerance Reporting
ÂÂÂÂÂÂÂ Kernel driver in use: pciback


dom0 "xl pci-list bug":
Vdev Device
00.0 0000:03:00.1
00.0 0000:04:00.0

dom0 "xl pci-list working"
Vdev Device
00.0 0000:00:1a.0


dom0 "xl dmesg":
(XEN) Xen version 4.4.1 (Debian 4.4.1-9+deb8u3) (ultrotter@xxxxxxxxxx) (gcc (Debian 4.9.2-10) 4.9.2) debug=n Wed Nov 25 15:46:22 EET 2015
(XEN) Bootloader: GRUB 2.02~beta2-22+deb8u1
(XEN) Command line: placeholder dom0_mem=1024M,max:1024M
(XEN) Video information:
(XEN)Â VGA is text mode 80x25, font 8x16
(XEN)Â VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN)Â EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN)Â Found 4 MBR signatures
(XEN)Â Found 2 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN)Â 0000000000000000 - 0000000000099800 (usable)
(XEN)Â 0000000000099800 - 0000000000099c00 (reserved)
(XEN)Â 000000000009e000 - 00000000000a0000 (reserved)
(XEN)Â 00000000000f0000 - 0000000000100000 (reserved)
(XEN)Â 0000000000100000 - 00000000f1de4000 (usable)
(XEN)Â 00000000f1de4000 - 00000000f1dee000 (ACPI data)
(XEN)Â 00000000f1dee000 - 00000000f8000000 (reserved)
(XEN)Â 00000000fec00000 - 00000000fee10000 (reserved)
(XEN)Â 00000000ff800000 - 0000000100000000 (reserved)
(XEN)Â 0000000100000000 - 000000028bfff000 (usable)
(XEN) ACPI: RSDP 000F4F00, 0024 (r2 HPÂÂÂ )
(XEN) ACPI: XSDT F1DE6400, 00B4 (r1 HP ProLiant 2 ï 162E)
(XEN) ACPI: FACP F1DE6540, 00F4 (r3 HP ProLiant 2 ï 162E)
(XEN) ACPI: DSDT F1DE6640, 1C1A (r1 HPÂÂÂÂÂÂÂÂ DSDTÂÂÂÂÂÂÂ 1 INTL 20030228)
(XEN) ACPI: FACS F1DE4140, 0040
(XEN) ACPI: SPCR F1DE4180, 0050 (r1 HP SPCRRBSU 1 ï 162E)
(XEN) ACPI: MCFG F1DE4200, 003C (r1 HPÂÂÂÂ ProLiantÂÂÂÂÂÂÂ 1ÂÂÂÂÂÂÂÂÂÂÂÂ 0)
(XEN) ACPI: HPET F1DE4240, 0038 (r1 HP ProLiant 2 ï 162E)
(XEN) ACPI: FFFF F1DE4280, 0064 (r2 HP ProLiant 2 ï 162E)
(XEN) ACPI: SPMI F1DE4300, 0040 (r5 HP ProLiant 1 ï 162E)
(XEN) ACPI: ERST F1DE4340, 0230 (r1 HP ProLiant 1 ï 162E)
(XEN) ACPI: APIC F1DE4580, 0252 (r1 HPÂÂÂÂ ProLiantÂÂÂÂÂÂÂ 2ÂÂÂÂÂÂÂÂÂÂÂÂ 0)
(XEN) ACPI: FFFF F1DE4800, 0176 (r1 HP ProLiant 1 ï 162E)
(XEN) ACPI: BERT F1DE4980, 0030 (r1 HP ProLiant 1 ï 162E)
(XEN) ACPI: HEST F1DE49C0, 00BC (r1 HP ProLiant 1 ï 162E)
(XEN) ACPI: FFFF F1DE4A80, 1914 (r1 HP ProLiant 1 ï 162E)
(XEN) ACPI: FFFF F1DE63C0, 002D (r1 HPÂÂÂÂ ProLiantÂÂÂÂÂÂÂ 1ÂÂÂÂÂÂÂÂÂÂÂÂ 0)
(XEN) ACPI: SSDT F1DE8280, 0137 (r3ÂÂÂÂ HPÂ CRSPCI0ÂÂÂÂÂÂÂ 2ÂÂ HPÂÂÂÂÂÂÂ 1)
(XEN) ACPI: SSDT F1DE83C0, 0177 (r3ÂÂÂÂ HPÂÂ riser0ÂÂÂÂÂÂÂ 2 INTL 20030228)
(XEN) ACPI: SSDT F1DE8540, 01E1 (r1ÂÂÂÂ HPÂÂÂÂÂ pccÂÂÂÂÂÂÂ 1 INTL 20090625)
(XEN) ACPI: SSDT F1DE8740, 0377 (r1ÂÂÂÂ HPÂÂÂÂ pmabÂÂÂÂÂÂÂ 1 INTL 20090625)
(XEN) ACPI: SSDT F1DE8AC0, 0504 (r1 INTELÂ PPM RCMÂ 80000001 INTL 20061109)
(XEN) System RAM: 10205MB (10450416kB)
(XEN) Domain heap initialised
(XEN) Processor #0 7:10 APIC version 21
(XEN) Processor #2 7:10 APIC version 21
(XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Detected 2294.838 MHz processor.
(XEN) Initing memory sharing.
(XEN) xstate_init: using cntxt_size: 0x240 and states: 0x3
(XEN) I/O virtualisation disabled
(XEN) Enabled directed EOI with ioapic_ack_old on!
(XEN) ENABLING IO-APIC IRQs
(XEN)Â -> Using old ACK method
(XEN) Platform timer is 14.318MHz HPET
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN)Â - APIC MMIO access virtualisation
(XEN)Â - APIC TPR shadow
(XEN)Â - Extended Page Tables (EPT)
(XEN)Â - Virtual-Processor Identifiers (VPID)
(XEN)Â - Virtual NMI
(XEN)Â - MSR direct-access bitmap
(XEN)Â - Unrestricted Guest
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB
(XEN) Brought up 2 CPUs
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen kernel: 64-bit, lsb, compat32
(XEN)Â Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x1f18000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN)Â Dom0 alloc.:ÂÂ 000000023c000000->0000000240000000 (241836 pages to be allocated)
(XEN)Â Init. ramdisk: 000000028aeac000->000000028bdff8e4
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN)Â Loaded kernel: ffffffff81000000->ffffffff81f18000
(XEN)Â Init. ramdisk: ffffffff81f18000->ffffffff82e6b8e4
(XEN)Â Phys-Mach map: ffffffff82e6c000->ffffffff8306c000
(XEN)Â Start info:ÂÂÂ ffffffff8306c000->ffffffff8306c4b4
(XEN)Â Page tables:ÂÂ ffffffff8306d000->ffffffff8308a000
(XEN)Â Boot stack:ÂÂÂ ffffffff8308a000->ffffffff8308b000
(XEN)Â TOTAL:ÂÂÂÂÂÂÂÂ ffffffff80000000->ffffffff83400000
(XEN)Â ENTRY ADDRESS: ffffffff819021f0
(XEN) Dom0 has maximum 2 VCPUs
(XEN) Scrubbing Free RAM: ..........................................................................................done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(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 284kB init memory.
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d0: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d13: Forcing read-only access to MFN faba0
(XEN) mm.c:812: d0: Forcing read-only access to MFN faba0
(XEN) mm.c:812: d14: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d14: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d14: Forcing read-only access to MFN fbff1
(XEN) mm.c:812: d0: Forcing read-only access to MFN fbff1

dom0 "uname -a":
Linux dom0 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u2 (2016-01-02) x86_64 GNU/Linux

domU "bug" "uname -a":
Linux bug 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u2 (2016-01-02) x86_64 GNU/Linux

domU "working" "uname -a":
Linux working 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt20-1+deb8u2 (2016-01-02) x86_64 GNU/Linux


Br,
Tommi Airikka
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