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[Xen-users] Create VM fails with multiple VIF bridge on Intel I350-T4 with igb-5.3.4.4



Dear,

Environment:
Linux 4.1.18 with Xen 4.6.1
Network card hardware: 2x Intel 4-port I350
Dom0: LACP bond on eth3,eth4,eth7,eth8 with eth3 and eth4 on the first I350 card, eth7 and eth8 from the second I350 card. Bond in bridge. Dom0: eth1 and eth2 from first I350 card and eth5 and eth6 from second card, each in a bridge

root@cenbernod003:/etc/xen# brctl show
bridge name     bridge id               STP enabled     interfaces
xen_bond0               8000.a0369f18704e       no bond0
                                                        vif62.0
                                                        vif63.0
                                                        vif64.0
                                                        vif66.0
                                                        vif71.0
                                                        vif71.0-emu
xen_eth1                8000.a0369f18704c       no              eth1
                                                        vif66.1
xen_eth2                8000.a0369f18704d       no              eth2
                                                        vif66.2
xen_eth5                8000.a0369f187074       no              eth5
                                                        vif66.3
xen_eth6                8000.a0369f187075       no              eth6
                                                        vif66.4
root@cenbernod003:/etc/xen#

When booting a Linux domU with kernel 4.1.18 and igb driver 5.3.4.4, booting works when we boot with:
1. only LACP bond: vif        = [ 'bridge=xen_bond0' ]
2. eth1 bridge: vif         = [ 'bridge=xen_eth1' ]
3. eth1+eth2+eth5+eth6 bridge: vif = [ 'bridge=xen_eth1','bridge=xen_eth2','bridge=xen_eth5','bridge=xen_eth6' ] But as soon as we put the bond together with one of the other bridges (eg: vif = [ 'bridge=xen_bond0','bridge=xen_eth1' ]) we cannot get the domU to start and get the traces below. Booting the same machine with kernel 3.2.20 and igb driver 4.1.2 has been working fine on XEN 4.1.2 and still works on XEN 4.6.1 if we use it to boot the domU. So not sure if it is XEN, kernel, config or IGB driver related. Also our Windows HVM guests do not have a problem with it either and boot just fine on both the bond and the other bridges. Please advice. Many thanks in advance.

Traces:
root@cenbernod002:/etc/xen# xl create phpbersmbprd002 -c
Parsing config from phpbersmbprd002
[    0.000000] PAT configuration [0-7]: WB  WT  UC- UC  WC  WP  UC UC
[    0.000000] Initializing cgroup subsys cpuset
[    0.000000] Initializing cgroup subsys cpu
[    0.000000] Initializing cgroup subsys cpuacct
[ 0.000000] Linux version 4.1.18 (root@cenbernod003) (gcc version 4.9.2 (Debian 4.9.2-10) ) #1 SMP Sun Mar 27 11:10:10 CEST 2016
[    0.000000] Command line: root=/dev/xvda1 ro console=hvc0
[    0.000000] ACPI in unprivileged domain disabled
[    0.000000] Released 0 page(s)
[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] Xen: [mem 0x0000000000000000-0x000000000009ffff] usable
[    0.000000] Xen: [mem 0x00000000000a0000-0x00000000000fffff] reserved
[    0.000000] Xen: [mem 0x0000000000100000-0x00000000bfffffff] usable
[    0.000000] NX (Execute Disable) protection: active
[    0.000000] DMI not present or invalid.
[    0.000000] Hypervisor detected: Xen
[    0.000000] AGP: No AGP bridge found
[    0.000000] e820: last_pfn = 0xc0000 max_arch_pfn = 0x400000000
[    0.000000] init_memory_mapping: [mem 0x00000000-0x000fffff]
[    0.000000] init_memory_mapping: [mem 0xbfe00000-0xbfffffff]
[    0.000000] init_memory_mapping: [mem 0xa0000000-0xbfdfffff]
[    0.000000] init_memory_mapping: [mem 0x00100000-0x9fffffff]
[    0.000000] RAMDISK: [mem 0x01e8d000-0x0441cfff]
[    0.000000] NUMA turned off
[    0.000000] Faking a node at [mem 0x0000000000000000-0x00000000bfffffff]
[    0.000000] NODE_DATA(0) allocated [mem 0xbfa04000-0xbfa29fff]
[    0.000000] Zone ranges:
[    0.000000]   DMA      [mem 0x0000000000001000-0x0000000000ffffff]
[    0.000000]   DMA32    [mem 0x0000000001000000-0x00000000bfffffff]
[    0.000000]   Normal   empty
[    0.000000] Movable zone start for each node
[    0.000000] Early memory node ranges
[    0.000000]   node   0: [mem 0x0000000000001000-0x000000000009ffff]
[    0.000000]   node   0: [mem 0x0000000000100000-0x00000000bfffffff]
[ 0.000000] Initmem setup node 0 [mem 0x0000000000001000-0x00000000bfffffff]
[    0.000000] p2m virtual area at ffffc90000000000, size is 600000
[    0.000000] Remapped 0 page(s)
[ 0.000000] SFI: Simple Firmware Interface v0.81 http://simplefirmware.org
[    0.000000] smpboot: Allowing 8 CPUs, 0 hotplug CPUs
[    0.000000] e820: [mem 0xc0000000-0xffffffff] available for PCI devices
[    0.000000] Booting paravirtualized kernel on Xen
[    0.000000] Xen version: 4.6.1 (preserve-AD)
[ 0.000000] clocksource refined-jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645519600211568 ns [ 0.000000] setup_percpu: NR_CPUS:8192 nr_cpumask_bits:8 nr_cpu_ids:8 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 33 pages/cpu @ffff8800bbe00000 s95000 r8192 d31976 u262144 [ 0.000000] Built 1 zonelists in Node order, mobility grouping on. Total pages: 774026
[    0.000000] Policy zone: DMA32
[    0.000000] Kernel command line: root=/dev/xvda1 ro console=hvc0
[    0.000000] PID hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.000000] xsave: enabled xstate_bv 0x7, cntxt size 0x340 using standard form
[    0.000000] AGP: Checking aperture...
[    0.000000] AGP: No AGP bridge found
[ 0.000000] Memory: 3029064K/3145340K available (5725K kernel code, 1276K rwdata, 2508K rodata, 1588K init, 1616K bss, 116276K reserved, 0K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=8, Nodes=1
[    0.000000] Hierarchical RCU implementation.
[    0.000000]  Additional per-CPU info printed with stalls.
[    0.000000]  RCU restricting CPUs from NR_CPUS=8192 to nr_cpu_ids=8.
[    0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=16, nr_cpu_ids=8
[    0.000000] NR_IRQS:524544 nr_irqs:144 16
[    0.000000] xen:events: Using FIFO-based ABI
[    0.000000] Console: colour dummy device 80x25
[    0.000000] console [tty0] enabled
[    0.000000] console [hvc0] enabled
[ 0.000000] clocksource xen: mask: 0xffffffffffffffff max_cycles: 0x1cd42e4dffb, max_idle_ns: 881590591483 ns
[    0.000000] installing Xen timer for CPU 0
[    0.000000] tsc: Detected 3600.116 MHz processor
[ 0.004000] Calibrating delay loop (skipped), value calculated using timer frequency.. 7200.23 BogoMIPS (lpj=14400464)
[    0.004000] pid_max: default: 32768 minimum: 301
[    0.004000] Security Framework initialized
[    0.004000] SELinux:  Disabled at boot.
[    0.004000] AppArmor: AppArmor disabled by boot time parameter
[ 0.004000] Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes) [ 0.004000] Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
[    0.004000] Mount-cache hash table entries: 8192 (order: 4, 65536 bytes)
[ 0.004000] Mountpoint-cache hash table entries: 8192 (order: 4, 65536 bytes)
[    0.004000] Initializing cgroup subsys devices
[    0.004000] Initializing cgroup subsys freezer
[    0.004000] Initializing cgroup subsys net_cls
[    0.004000] CPU: Physical Processor ID: 0
[    0.004000] CPU: Processor Core ID: 0
[    0.004000] Last level iTLB entries: 4KB 512, 2MB 8, 4MB 8
[    0.004000] Last level dTLB entries: 4KB 512, 2MB 32, 4MB 32, 1GB 0
[ 0.012159] Performance Events: unsupported p6 CPU model 45 no PMU driver, software events only.
[    0.012371] SMP alternatives: switching to SMP code
[    0.021942] installing Xen timer for CPU 1
[    0.022093] installing Xen timer for CPU 2
[    0.022217] installing Xen timer for CPU 3
[    0.022363] installing Xen timer for CPU 4
[    0.022491] installing Xen timer for CPU 5
[    0.022611] installing Xen timer for CPU 6
[    0.022733] installing Xen timer for CPU 7
[    0.022813] x86: Booted up 1 node, 8 CPUs
[    0.022883] devtmpfs: initialized
[ 0.022883] clocksource jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 7645041785100000 ns
[    0.022883] xor: automatically using best checksumming function:
[    0.060002]    avx       : 36820.000 MB/sec
[    0.060011] pinctrl core: initialized pinctrl subsystem
[    0.060146] NET: Registered protocol family 16
[    0.060159] xen:grant_table: Grant tables using version 1 layout
[    0.060169] Grant table initialized
[    0.060331] PCI: setting up Xen PCI frontend stub
[    0.137827] raid6: sse2x1   gen()  9977 MB/s
[    0.206016] raid6: sse2x1   xor()  7597 MB/s
[    0.274175] raid6: sse2x2   gen() 12663 MB/s
[    0.342332] raid6: sse2x2   xor()  8954 MB/s
[    0.410505] raid6: sse2x4   gen() 14833 MB/s
[    0.478673] raid6: sse2x4   xor() 10924 MB/s
[    0.478677] raid6: using algorithm sse2x4 gen() 14833 MB/s
[    0.478680] raid6: .... xor() 10924 MB/s, rmw enabled
[    0.478684] raid6: using ssse3x2 recovery algorithm
[    0.478720] ACPI: Interpreter disabled.
[    0.478733] xen:balloon: Initialising balloon driver
[    0.496023] xen_balloon: Initialising balloon driver
[    0.496037] vgaarb: loaded
[    0.496063] PCI: System does not support PCI
[    0.496063] PCI: System does not support PCI
[    0.496153] Switched to clocksource xen
[    0.499438] FS-Cache: Loaded
[    0.499476] pnp: PnP ACPI: disabled
[    0.501172] NET: Registered protocol family 2
[ 0.501321] TCP established hash table entries: 32768 (order: 6, 262144 bytes)
[    0.501407] TCP bind hash table entries: 32768 (order: 7, 524288 bytes)
[    0.501459] TCP: Hash tables configured (established 32768 bind 32768)
[    0.501486] UDP hash table entries: 2048 (order: 4, 65536 bytes)
[    0.501504] UDP-Lite hash table entries: 2048 (order: 4, 65536 bytes)
[    0.501549] NET: Registered protocol family 1
[    0.501625] RPC: Registered named UNIX socket transport module.
[    0.501630] RPC: Registered udp transport module.
[    0.501633] RPC: Registered tcp transport module.
[    0.501636] RPC: Registered tcp NFSv4.1 backchannel transport module.
[    0.501672] Unpacking initramfs...
[ 0.525917] Freeing initrd memory: 38464K (ffff880001e8d000 - ffff88000441d000)
[    0.525967] kvm: no hardware support
[    0.525972] has_svm: not amd
[    0.525974] kvm: no hardware support
[ 0.526015] platform rtc_cmos: registered platform RTC device (no PNP device found) [ 0.526041] RAPL PMU detected, API unit is 2^-32 Joules, 3 fixed counters 163840 ms ovfl timer
[    0.526047] hw unit of domain pp0-core 2^-16 Joules
[    0.526051] hw unit of domain package 2^-16 Joules
[    0.526054] hw unit of domain dram 2^-16 Joules
[    0.527126] AVX version of gcm_enc/dec engaged.
[    0.527130] AES CTR mode by8 optimization enabled
[    0.527730] futex hash table entries: 2048 (order: 5, 131072 bytes)
[    0.527758] audit: initializing netlink subsys (disabled)
[    0.527772] audit: type=2000 audit(1459186809.758:1): initialized
[    0.528123] HugeTLB registered 2 MB page size, pre-allocated 0 pages
[    0.529363] VFS: Disk quotas dquot_6.6.0
[ 0.529394] VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
[    0.529687] FS-Cache: Netfs 'nfs' registered for caching
[    0.529802] NFS: Registering the id_resolver key type
[    0.529811] Key type id_resolver registered
[    0.529814] Key type id_legacy registered
[    0.529819] Installing knfsd (copyright (C) 1996 okir@xxxxxxxxxxxx).
[    0.529951] FS-Cache: Netfs 'cifs' registered for caching
[    0.530001] Key type cifs.spnego registered
[    0.530578] async_tx: api initialized (async)
[    0.530597] bounce: pool size: 64 pages
[ 0.530623] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 252)
[    0.530631] io scheduler noop registered (default)
[    0.530635] io scheduler deadline registered
[    0.530674] io scheduler cfq registered
[    0.530711] pci_hotplug: PCI Hot Plug PCI Core version: 0.5
[    0.530726] pciehp: PCI Express Hot Plug Controller Driver version: 0.4
[    0.530804] xen:xen_evtchn: Event-channel device installed
[    0.531066] Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
[    0.531285] Linux agpgart interface v0.103
[    0.533250] Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011)
[    0.533651] tun: Universal TUN/TAP device driver, 1.6
[    0.533655] tun: (C) 1999-2004 Max Krasnyansky <maxk@xxxxxxxxxxxx>
[    0.533699] VMware vmxnet3 virtual NIC driver - version 1.3.5.0-k-NAPI
[    0.533711] xen_netfront: Initialising Xen virtual ethernet driver
[ 0.546357] blkfront: xvda1: flush diskcache: enabled; persistent grants: enabled; indirect descriptors: enabled;
[    0.546364] i8042: PNP: No PS/2 controller found. Probing ports directly.
[    0.582937] xen_netfront: can't alloc rx grant refs
[    0.582946] net eth3: only created 7 queues
[    0.593106] xen_netfront: can't alloc rx grant refs
[    0.593115] net eth4: only created 0 queues
[    0.593118] net eth4: no queues
[    1.546674] i8042: No controller found
[ 1.546734] clocksource tsc: mask: 0xffffffffffffffff max_cycles: 0x33e4c0c6605, max_idle_ns: 440795332340 ns
[    1.546849] mousedev: PS/2 mouse device common for all mice
[    1.566853] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    1.566979] rtc_cmos: probe of rtc_cmos failed with error -38
[    1.567004] md: raid1 personality registered for level 1
[    1.567087] md: raid6 personality registered for level 6
[    1.567094] md: raid5 personality registered for level 5
[    1.567099] md: raid4 personality registered for level 4
[    1.567105] md: multipath personality registered for level -4
[    1.567111] md: faulty personality registered for level -5
[    1.567171] device-mapper: uevent: version 1.0.3
[ 1.567247] device-mapper: ioctl: 4.31.0-ioctl (2015-3-12) initialised: dm-devel@xxxxxxxxxx
[    1.567415] NET: Registered protocol family 10
[    1.567730] mip6: Mobile IPv6
[    1.567738] NET: Registered protocol family 17
[    1.567764] Key type dns_resolver registered
[    1.567772] mce: Unable to init device /dev/mcelog (rc: -5)
[    1.567970] registered taskstats version 1
[ 6.620017] xenbus_probe_frontend: Waiting for devices to initialise: 25s...
[    7.880024] random: nonblocking pool is initialized
[   11.624019] 20s...15s...10s...5s...0s...
[   36.644022] 235s...230s...225s...220s...215s...
[   61.556006] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 61.556033] 3: (7 GPs behind) idle=897/140000000000000/0 softirq=2/109 fqs=14950
[   61.556041]  (detected by 4, t=15002 jiffies, g=-291, c=-292, q=8)
[   61.556049] Task dump for CPU 3:
[ 61.556054] xenwatch R running task 0 42 2 0x00000008 [ 61.556062] ffff880003d1f468 000000000000000d ffffffff81418877 ffff8800bb830400 [ 61.556073] ffffffff00000003 4554535953425553 45440074656e3d4d 00386e3d45434956 [ 61.556094] 0000003520787220 0000000000000027 ffffffff81ae0840 ffffffff810dbbd8
[   61.556103] Call Trace:
[   61.556113]  [<ffffffff81418877>] ? dev_vprintk_emit+0x1a1/0x1b3
[   61.556122]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[   61.556128]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[   61.556136]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[   61.556143]  [<ffffffff810dbafd>] ? up+0xb/0x33
[   61.556148]  [<ffffffff810dbbd0>] ? arch_local_irq_restore+0x7/0x8
[   61.556155]  [<ffffffff81591484>] ? _raw_spin_unlock_irqrestore+0xc/0xd
[   61.556173]  [<ffffffff810dfe9a>] ? console_unlock+0x311/0x34c
[   61.556180]  [<ffffffff814188c2>] ? dev_printk_emit+0x39/0x3e
[   61.556187]  [<ffffffff810e0231>] ? vprintk+0xa/0x14
[   61.556193]  [<ffffffff814188f6>] ? __dev_printk+0x2f/0x6a
[   61.556199]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[   61.556205]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[   61.556211]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[ 61.556230] [<ffffffff813cd0ec>] ? gnttab_free_grant_references+0x26/0x5e
[   61.556238]  [<ffffffff81451f5c>] ? xennet_disconnect_backend+0x24b/0x2c0
[   61.556245]  [<ffffffff81452a33>] ? netback_changed+0xa23/0xb89
[   61.556252]  [<ffffffff813d2bc6>] ? xenbus_gather+0x131/0x131
[   61.556259]  [<ffffffff813d2c8a>] ? xenwatch_thread+0xc4/0xee
[   61.556265]  [<ffffffff810d8bdb>] ? finish_wait+0x5d/0x5d
[   61.556272]  [<ffffffff810c542a>] ? kthread+0xab/0xb3
[   61.556278]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[   61.556295]  [<ffffffff81591c22>] ? ret_from_fork+0x42/0x70
[   61.556301]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[ 61.644024] 210s...205s...200s...195s...190s...185s...180s...175s...170s...165s...160s...155s...150s...145s...140s...135s...130s...125s...120s...115s...110s...105s...100s...95s...90s...85s...80s...75s...70s...65s...60s...55s...50s...45s...40s...35s...
[  241.576017] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 241.576027] 3: (7 GPs behind) idle=897/140000000000000/0 softirq=2/109 fqs=55265
[  241.576032]  (detected by 4, t=60007 jiffies, g=-291, c=-292, q=8)
[  241.576037] Task dump for CPU 3:
[ 241.576040] xenwatch R running task 0 42 2 0x00000008 [ 241.576046] ffff880003d1f468 000000000000000d ffffffff81418877 ffff8800bb830400 [ 241.576053] ffffffff00000003 4554535953425553 45440074656e3d4d 00386e3d45434956 [ 241.576059] 0000003520787220 0000000000000027 ffffffff81ae0840 ffffffff810dbbd8
[  241.576065] Call Trace:
[  241.576073]  [<ffffffff81418877>] ? dev_vprintk_emit+0x1a1/0x1b3
[  241.576079]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  241.576084]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  241.576089]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[  241.576092]  [<ffffffff810dbafd>] ? up+0xb/0x33
[  241.576096]  [<ffffffff810dbbd0>] ? arch_local_irq_restore+0x7/0x8
[  241.576100]  [<ffffffff81591484>] ? _raw_spin_unlock_irqrestore+0xc/0xd
[  241.576105]  [<ffffffff810dfe9a>] ? console_unlock+0x311/0x34c
[  241.576109]  [<ffffffff814188c2>] ? dev_printk_emit+0x39/0x3e
[  241.576113]  [<ffffffff810e0231>] ? vprintk+0xa/0x14
[  241.576117]  [<ffffffff814188f6>] ? __dev_printk+0x2f/0x6a
[  241.576121]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  241.576124]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  241.576128]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[ 241.576134] [<ffffffff813cd0ec>] ? gnttab_free_grant_references+0x26/0x5e
[  241.576139]  [<ffffffff81451f5c>] ? xennet_disconnect_backend+0x24b/0x2c0
[  241.576143]  [<ffffffff81452a33>] ? netback_changed+0xa23/0xb89
[  241.576148]  [<ffffffff813d2bc6>] ? xenbus_gather+0x131/0x131
[  241.576152]  [<ffffffff813d2c8a>] ? xenwatch_thread+0xc4/0xee
[  241.576157]  [<ffffffff810d8bdb>] ? finish_wait+0x5d/0x5d
[  241.576161]  [<ffffffff810c542a>] ? kthread+0xab/0xb3
[  241.576165]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[  241.576169]  [<ffffffff81591c22>] ? ret_from_fork+0x42/0x70
[  241.576173]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[  241.644014] 30s...25s...20s...15s...10s...5s...0s...
[  271.644025]
[ 271.644155] xenbus_probe_frontend: Timeout connecting to device: device/vif/4 (local state 1, remote state 2)
[  271.644353] hctosys: unable to open rtc device (rtc0)
[  421.596013] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 421.596025] 3: (7 GPs behind) idle=897/140000000000000/0 softirq=2/109 fqs=96139
[  421.596030]  (detected by 5, t=105012 jiffies, g=-291, c=-292, q=9)
[  421.596035] Task dump for CPU 3:
[ 421.596038] xenwatch R running task 0 42 2 0x00000008 [ 421.596043] ffff880003d1f468 000000000000000d ffffffff81418877 ffff8800bb830400 [ 421.596050] ffffffff00000003 4554535953425553 45440074656e3d4d 00386e3d45434956 [ 421.596056] 0000003520787220 0000000000000027 ffffffff81ae0840 ffffffff810dbbd8
[  421.596062] Call Trace:
[  421.596070]  [<ffffffff81418877>] ? dev_vprintk_emit+0x1a1/0x1b3
[  421.596075]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  421.596080]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  421.596085]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[  421.596089]  [<ffffffff810dbafd>] ? up+0xb/0x33
[  421.596092]  [<ffffffff810dbbd0>] ? arch_local_irq_restore+0x7/0x8
[  421.596096]  [<ffffffff81591484>] ? _raw_spin_unlock_irqrestore+0xc/0xd
[  421.596101]  [<ffffffff810dfe9a>] ? console_unlock+0x311/0x34c
[  421.596105]  [<ffffffff814188c2>] ? dev_printk_emit+0x39/0x3e
[  421.596109]  [<ffffffff810e0231>] ? vprintk+0xa/0x14
[  421.596113]  [<ffffffff814188f6>] ? __dev_printk+0x2f/0x6a
[  421.596119]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  421.596126]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  421.596131]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[ 421.596138] [<ffffffff813cd0ec>] ? gnttab_free_grant_references+0x26/0x5e
[  421.596145]  [<ffffffff81451f5c>] ? xennet_disconnect_backend+0x24b/0x2c0
[  421.596152]  [<ffffffff81452a33>] ? netback_changed+0xa23/0xb89
[  421.596159]  [<ffffffff813d2bc6>] ? xenbus_gather+0x131/0x131
[  421.596165]  [<ffffffff813d2c8a>] ? xenwatch_thread+0xc4/0xee
[  421.596172]  [<ffffffff810d8bdb>] ? finish_wait+0x5d/0x5d
[  421.596179]  [<ffffffff810c542a>] ? kthread+0xab/0xb3
[  421.596183]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[  421.596190]  [<ffffffff81591c22>] ? ret_from_fork+0x42/0x70
[  421.596197]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[  601.616008] INFO: rcu_sched detected stalls on CPUs/tasks:
[ 601.616022] 3: (7 GPs behind) idle=897/140000000000000/0 softirq=2/109 fqs=137747
[  601.616029]  (detected by 4, t=150017 jiffies, g=-291, c=-292, q=9)
[  601.616035] Task dump for CPU 3:
[ 601.616039] xenwatch R running task 0 42 2 0x00000008 [ 601.616047] ffff880003d1f468 000000000000000d ffffffff81418877 ffff8800bb830400 [ 601.616056] ffffffff00000003 4554535953425553 45440074656e3d4d 00386e3d45434956 [ 601.616065] 0000003520787220 0000000000000027 ffffffff81ae0840 ffffffff810dbbd8
[  601.616075] Call Trace:
[  601.616085]  [<ffffffff81418877>] ? dev_vprintk_emit+0x1a1/0x1b3
[  601.616093]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  601.616100]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  601.616107]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[  601.616113]  [<ffffffff810dbafd>] ? up+0xb/0x33
[  601.616119]  [<ffffffff810dbbd0>] ? arch_local_irq_restore+0x7/0x8
[  601.616125]  [<ffffffff81591484>] ? _raw_spin_unlock_irqrestore+0xc/0xd
[  601.616132]  [<ffffffff810dfe9a>] ? console_unlock+0x311/0x34c
[  601.616138]  [<ffffffff814188c2>] ? dev_printk_emit+0x39/0x3e
[  601.616144]  [<ffffffff810e0231>] ? vprintk+0xa/0x14
[  601.616150]  [<ffffffff814188f6>] ? __dev_printk+0x2f/0x6a
[  601.616156]  [<ffffffff810dbbd8>] ? arch_local_irq_disable+0x7/0x8
[  601.616162]  [<ffffffff810dbbea>] ? arch_local_irq_save+0x11/0x17
[  601.616168]  [<ffffffff81591547>] ? _raw_spin_lock_irqsave+0x9/0x35
[ 601.616175] [<ffffffff813cd0ec>] ? gnttab_free_grant_references+0x26/0x5e
[  601.616184]  [<ffffffff81451f5c>] ? xennet_disconnect_backend+0x24b/0x2c0
[  601.616190]  [<ffffffff81452a33>] ? netback_changed+0xa23/0xb89
[  601.616198]  [<ffffffff813d2bc6>] ? xenbus_gather+0x131/0x131
[  601.616204]  [<ffffffff813d2c8a>] ? xenwatch_thread+0xc4/0xee
[  601.616211]  [<ffffffff810d8bdb>] ? finish_wait+0x5d/0x5d
[  601.616218]  [<ffffffff810c542a>] ? kthread+0xab/0xb3
[  601.616223]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d
[  601.616230]  [<ffffffff81591c22>] ? ret_from_fork+0x42/0x70
[  601.616235]  [<ffffffff810c537f>] ? __kthread_parkme+0x5d/0x5d

kr,

Willem


--
Willem Verbruggen                           ANAGKY BVBA
Zaakvoerder                                 Thaliastraat 71
+32 (0)497 54 96 36                         2600 Antwerpen
willem.verbruggen@xxxxxxxxx                 BE 0894.681.775



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