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Re: [Xen-users] Xen bridging issue

To: xen-users@xxxxxxxxxxxxx, Viktor Dukhovni <viktor1xen@xxxxxxxxxxxx>
From: johnny Strom <johnny.strom@xxxxxxxxxxxxxxxxx>
Date: Mon, 21 Sep 2015 13:33:08 +0300
Delivery-date: Mon, 21 Sep 2015 10:33:50 +0000
List-id: Xen user discussion <xen-users.lists.xen.org>

On 09/18/2015 05:28 PM, Viktor Dukhovni wrote:

On Mon, Sep 14, 2015 at 06:09:08PM +0000, Viktor Dukhovni wrote:

Commit id

4c82ac3c37363e8c4ded6a5fe1ec5fa756b34df3
32a844056fd43dda647e1c3c6b9983bdfa04d17d

These don't fix the bug that I fixed in xen-netfront.c.  Specifically,
in talk_to_netback() num_queues needs to be updated after return
from xennet_create_queues(), because the latter might create fewer
queues than requested:

     +  num_queues = info->netdev->real_num_tx_queues;

A related question was whether further improvements are needed to
make it more likely that xennet_create_queues() does not (in typical
use) create fewer queues than requested.  This might mean making
more "grant refs" available to the front end.

Any feedback on the above?  I am not sure the fix is complete.
Should the netfront code run out of "grant refs" on guests with
many CPUs, and just deal with that (as above), or should something
else also be change so that the above action rarely needs to be
taken (becomes a noop under "normal" conditions).

Will someone review the patch and forward upstream?


Hello

I have patched xen-netfront.c and compiled the debian kernel 3.16.7kernel in domU.

Now it works ok with just one network card bridged but not with two seebelow.



[    0.391216] i8042: PNP: No PS/2 controller found. Probing ports directly.
[    1.393940] i8042: No controller found
[    1.394077] mousedev: PS/2 mouse device common for all mice
[    1.453760] rtc_cmos rtc_cmos: rtc core: registered rtc_cmos as rtc0
[    1.453810] rtc_cmos: probe of rtc_cmos failed with error -38
[    1.453854] ledtrig-cpu: registered to indicate activity on CPUs
[    1.453868] AMD IOMMUv2 driver by Joerg Roedel <joerg.roedel@xxxxxxx>
[    1.453871] AMD IOMMUv2 functionality not available on this system
[    1.453962] TCP: cubic registered
[    1.454184] random: nonblocking pool is initialized
[    1.454549] NET: Registered protocol family 10
[    1.455205] mip6: Mobile IPv6
[    1.455214] NET: Registered protocol family 17
[    1.455224] mpls_gso: MPLS GSO support
[    1.455230] mce: Unable to init device /dev/mcelog (rc: -5)
[    1.455431] registered taskstats version 1

[ 1.455480] xenbus_probe_frontend: Device with no driver:device/vbd/51713[ 1.455484] xenbus_probe_frontend: Device with no driver:device/vbd/51714

[    1.455487] xenbus_probe_frontend: Device with no driver: device/vif/0
[    1.455638] rtc_hctosys: unable to open rtc device (rtc0)

[ 1.456501] Freeing unused kernel memory: 1208K (ffffffff818fc000 -ffffffff81a2a000)

[    1.456508] Write protecting the kernel read-only data: 8192k

[ 1.459205] Freeing unused kernel memory: 852K (ffff88000152b000 -ffff880001600000)[ 1.459422] Freeing unused kernel memory: 232K (ffff8800017c6000 -ffff880001800000)

Loading, please wait...
[    1.483559] systemd-udevd[252]: starting version 215
[    1.503353] xen_netfront: Initialising Xen virtual ethernet driver
[    1.510752] xen_netfront: can't alloc rx grant refs
[    1.510762] net eth0: only created 31 of 40 queues

[ 1.548952] blkfront: xvda1: flush diskcache: enabled; persistentgrants: enabled; indirect descriptors: disabled;[ 1.550316] blkfront: xvda2: flush diskcache: enabled; persistentgrants: enabled; indirect descriptors: disabled;

[    1.550813] Setting capacity to 2097152
[    1.550824] xvda2: detected capacity change from 0 to 1073741824
Begin: Loading essential drivers ... done.
Begin: Running /scripts/init-premount ... done.

Then I bridge two network cards with the patch applied that dose notwork yet.


So there is still issues with more than one card bridged.
I still have the machine offline so I can do more testing if needed.


[    1.424701] mce: Unable to init device /dev/mcelog (rc: -5)
[    1.424879] registered taskstats version 1

[ 1.424926] xenbus_probe_frontend: Device with no driver:device/vbd/51713[ 1.424930] xenbus_probe_frontend: Device with no driver:device/vbd/51714

[    1.424933] xenbus_probe_frontend: Device with no driver: device/vif/0
[    1.424936] xenbus_probe_frontend: Device with no driver: device/vif/1
[    1.425058] rtc_hctosys: unable to open rtc device (rtc0)

[ 1.425855] Freeing unused kernel memory: 1208K (ffffffff818fc000 -ffffffff81a2a000)

[    1.425862] Write protecting the kernel read-only data: 8192k

[ 1.428554] Freeing unused kernel memory: 852K (ffff88000152b000 -ffff880001600000)[ 1.428759] Freeing unused kernel memory: 232K (ffff8800017c6000 -ffff880001800000)

Loading, please wait...
[    1.452443] systemd-udevd[254]: starting version 215
[    1.470456] xen_netfront: Initialising Xen virtual ethernet driver
[    1.475466] xen_netfront: can't alloc rx grant refs
[    1.475479] net eth0: only created 31 of 40 queues

[ 1.549562] blkfront: xvda1: flush diskcache: enabled; persistentgrants: enabled; indirect descriptors: disabled;[ 1.551021] blkfront: xvda2: flush diskcache: enabled; persistentgrants: enabled; indirect descriptors: disabled;

[    1.551623] Setting capacity to 2097152
[    1.551636] xvda2: detected capacity change from 0 to 1073741824
[    1.558154] xen_netfront: can't alloc rx grant refs
[    1.558162] net eth1: only created 0 of 40 queues
[    1.558166] net eth1: no queues

[ 6.644043] xenbus_probe_frontend: Waiting for devices to initialise:25s...20s...15s...10s...[ 22.572003] INFO: rcu_sched detected stalls on CPUs/tasks: { 3}(detected by 23, t=5252 jiffies, g=-276, c=-277, q=91)

[   22.572003] sending NMI to all CPUs:
[    1.561758] NMI backtrace for cpu 3
[    1.561758] CPU: 3 PID: 209 Comm: xenwatch Not tainted 3.16.7-ckt11 #2

[ 1.561758] task: ffff8800f8851370 ti: ffff8800f8854000 task.ti:ffff8800f8854000[ 1.561758] RIP: e030:[<ffffffff81362813>] [<ffffffff81362813>]gnttab_free_grant_references+0x63/0xc0

[    1.561758] RSP: e02b:ffff8800f8857da8  EFLAGS: 00000046

[ 1.561758] RAX: 0000000000000200 RBX: 0000000000000000 RCX:ffff8800f8832000[ 1.561758] RDX: 0000000000000000 RSI: 0000000000000085 RDI:ffffffff81aea108[ 1.561758] RBP: 0000000000000000 R08: 00000000e35ba33e R09:ffff8800f8ff6b40[ 1.561758] R10: 0000000000000000 R11: ffff88000531a000 R12:ffff880002c01540[ 1.561758] R13: 0000160000000000 R14: ffff880002c00000 R15:0000000000000400[ 1.561758] FS: 0000000000000000(0000) GS:ffff8800faa60000(0000)knlGS:0000000000000000

[    1.561758] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 1.561758] CR2: 0000000000000000 CR3: 0000000001812000 CR4:0000000000042660

[    1.561758] Stack:

[ 1.561758] ffffffff8106d2ae ffff87ffffffffff ffffffffa0067f5affff8800f8857dc8[ 1.561758] ffff880000000010 0000000000000000 0000000000131a00ffff8800047ef8e0[ 1.561758] ffff8800047ef8c0 0000000000000000 0000000000000000ffff8800f8968c00

[    1.561758] Call Trace:
[    1.561758]  [<ffffffff8106d2ae>] ? __local_bh_enable_ip+0x1e/0xa0

[ 1.561758] [<ffffffffa0067f5a>] ?xennet_disconnect_backend.isra.22+0x29a/0x390 [xen_netfront][ 1.561758] [<ffffffffa006aa7c>] ? netback_changed+0x83c/0xe70[xen_netfront]

[    1.561758]  [<ffffffff8136837b>] ? xenbus_read_driver_state+0x2b/0x40
[    1.561758]  [<ffffffff8136a230>] ? unregister_xenbus_watch+0x220/0x220
[    1.561758]  [<ffffffff8136a2c8>] ? xenwatch_thread+0x98/0x140
[    1.561758]  [<ffffffff810aa2c0>] ? prepare_to_wait_event+0xf0/0xf0
[    1.561758]  [<ffffffff81089d7f>] ? kthread+0xcf/0xf0
[    1.561758]  [<ffffffff81089cb0>] ? kthread_create_on_node+0x180/0x180
[    1.561758]  [<ffffffff81523098>] ? ret_from_fork+0x58/0x90
[    1.561758]  [<ffffffff81089cb0>] ? kthread_create_on_node+0x180/0x180

[ 1.561758] Code: 00 00 00 49 8b 14 d1 48 8d 0c 8a 8b 11 83 fa ff 7424 66 0f 1f 44 00 00 89 d1 81 e2 ff 03 00 00 41 83 c0 01 c1 e9 0a 49 8b0c c9 <48> 8d 0c 91 8b 11 83 fa ff 75 e2 8b 15 e8 78 78 00 44 01 05 e5

[   22.552064] NMI backtrace for cpu 9
[   22.552064] CPU: 9 PID: 0 Comm: swapper/9 Not tainted 3.16.7-ckt11 #2

[ 22.552064] task: ffff8800f9fe7430 ti: ffff8800f9ff0000 task.ti:ffff8800f9ff0000[ 22.552064] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.552064] RSP: e02b:ffff8800f9ff3ec8  EFLAGS: 00000246

[ 22.552064] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.552064] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.552064] RBP: 0000000000000009 R08: 0000000000000000 R09:0000000000000000[ 22.552064] R10: 00000097f8089626 R11: 0000000000000246 R12:ffff8800f9ff0000[ 22.552064] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9ff3fd8[ 22.552064] FS: 0000000000000000(0000) GS:ffff8800fab20000(0000)knlGS:ffff8800fab20000

[   22.552064] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.552064] CR2: 000000000220b040 CR3: 0000000001812000 CR4:0000000000042660

[   22.552064] Stack:

[ 22.552064] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.552064] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9ff0000[ 22.552064] ffff8800f9ff0000 ffff8800f9ff3fd8 0000000000000001c7bd2e775a7b14e7

[   22.552064] Call Trace:
[   22.552064]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.552064]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.552064]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.552064] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.552079] NMI backtrace for cpu 12
[   22.552079] CPU: 12 PID: 0 Comm: swapper/12 Not tainted 3.16.7-ckt11 #2

[ 22.552079] task: ffff8800f9801470 ti: ffff8800f9804000 task.ti:ffff8800f9804000[ 22.552079] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.552079] RSP: e02b:ffff8800f9807ec8  EFLAGS: 00000246

[ 22.552079] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.552079] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.552079] RBP: 000000000000000c R08: 0000000000000000 R09:0000000000000000[ 22.552079] R10: 00000097f8bfb126 R11: 0000000000000246 R12:ffff8800f9804000[ 22.552079] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9807fd8[ 22.552079] FS: 0000000000000000(0000) GS:ffff8800fab80000(0000)knlGS:ffff881ffed60000

[   22.552079] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.552079] CR2: 00007f1e24e1b095 CR3: 0000000001812000 CR4:0000000000042660

[   22.552079] Stack:

[ 22.552079] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.552079] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9804000[ 22.552079] ffff8800f9804000 ffff8800f9807fd8 000000000000000170136a0fec9af024

[   22.552079] Call Trace:
[   22.552079]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.552079]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.552079]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.552079] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.572003] NMI backtrace for cpu 23

[ 22.572003] CPU: 23 PID: 256 Comm: systemd-udevd Not tainted3.16.7-ckt11 #2[ 22.572003] task: ffff8800045dd3f0 ti: ffff8800045e0000 task.ti:ffff8800045e0000[ 22.572003] RIP: e030:[<ffffffff8100130a>] [<ffffffff8100130a>]xen_hypercall_vcpu_op+0xa/0x20

[   22.572003] RSP: e02b:ffff8800face3cb8  EFLAGS: 00000046

[ 22.572003] RAX: 0000000000000000 RBX: 0000000000000017 RCX:ffffffff8100130a[ 22.572003] RDX: 0000000000000000 RSI: 0000000000000017 RDI:000000000000000b[ 22.572003] RBP: ffffffff818efc40 R08: ffffffff818ef6c0 R09:0000000000000000[ 22.572003] R10: 001dcd6500000000 R11: 0000000000000246 R12:ffffffff818ef6c0[ 22.572003] R13: 0000000000000005 R14: 000000000000005b R15:ffffffff81856b80[ 22.572003] FS: 00007fc0dd943880(0000) GS:ffff8800face0000(0000)knlGS:ffff8800fae40000

[   22.572003] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033

[ 22.572003] CR2: 00007fc0dd94a000 CR3: 00000000f95d7000 CR4:0000000000042660

[   22.572003] Stack:

[ 22.572003] ffff88000531a000 0000000000000017 ffffffff81366adfffffffff8100f55a[ 22.572003] ffff8800faced880 ffffffff81856a00 0000000000000017ffffffff818efc80[ 22.572003] ffffffff8104746e ffff8800faced880 ffffffff810c7f650000000000000001

[   22.572003] Call Trace:
[   22.572003]  <IRQ>
[   22.572003]  [<ffffffff81366adf>] ? xen_send_IPI_one+0x3f/0x60
[   22.572003]  [<ffffffff8100f55a>] ? __xen_send_IPI_mask+0x2a/0x50

[ 22.572003] [<ffffffff8104746e>] ?arch_trigger_all_cpu_backtrace+0x12e/0x140

[   22.572003]  [<ffffffff810c7f65>] ? rcu_check_callbacks+0x615/0x640
[   22.572003]  [<ffffffff810d2980>] ? tick_sched_handle.isra.16+0x60/0x60
[   22.572003]  [<ffffffff81075f40>] ? update_process_times+0x40/0x70
[   22.572003]  [<ffffffff810d2940>] ? tick_sched_handle.isra.16+0x20/0x60
[   22.572003]  [<ffffffff810d29bc>] ? tick_sched_timer+0x3c/0x60
[   22.572003]  [<ffffffff8108cef7>] ? __run_hrtimer+0x67/0x1c0
[   22.572003]  [<ffffffff8108d2b9>] ? hrtimer_interrupt+0xf9/0x230
[   22.572003]  [<ffffffff81009f6a>] ? xen_timer_interrupt+0x2a/0x150
[   22.572003]  [<ffffffff8139ecae>] ? add_interrupt_randomness+0x3e/0x200
[   22.572003]  [<ffffffff810bd67c>] ? handle_irq_event_percpu+0x6c/0x190
[   22.572003]  [<ffffffff810c0bae>] ? handle_percpu_irq+0x3e/0x60
[   22.572003]  [<ffffffff810bcc17>] ? generic_handle_irq+0x27/0x40
[   22.572003]  [<ffffffff81367d3f>] ? evtchn_fifo_handle_events+0x15f/0x170
[   22.572003]  [<ffffffff81364c0f>] ? __xen_evtchn_do_upcall+0x3f/0x80
[   22.572003]  [<ffffffff8105e4f0>] ? flush_tlb_func+0xa0/0xa0
[   22.572003]  [<ffffffff81366b2f>] ? xen_evtchn_do_upcall+0x2f/0x40
[   22.572003]  [<ffffffff81524dde>] ? xen_do_hypervisor_callback+0x1e/0x30
[   22.572003]  <EOI>
[   22.572003]  [<ffffffff8105e4f0>] ? flush_tlb_func+0xa0/0xa0
[   22.572003]  [<ffffffff810d8026>] ? smp_call_function_many+0x216/0x270
[   22.572003]  [<ffffffff810d7ff3>] ? smp_call_function_many+0x1e3/0x270
[   22.572003]  [<ffffffff8105e4f0>] ? flush_tlb_func+0xa0/0xa0
[   22.572003]  [<ffffffff810d81e8>] ? on_each_cpu+0x28/0x50
[   22.572003]  [<ffffffff8105e836>] ? flush_tlb_kernel_range+0x46/0x80
[   22.572003]  [<ffffffff81075109>] ? try_to_del_timer_sync+0x49/0x60
[   22.572003]  [<ffffffff8117bf22>] ? __purge_vmap_area_lazy+0x3c2/0x430
[   22.572003]  [<ffffffff8117c0fc>] ? vm_unmap_aliases+0x16c/0x180
[   22.572003]  [<ffffffff8105ac13>] ? change_page_attr_set_clr+0xe3/0x470
[   22.572003]  [<ffffffff815215ce>] ? mutex_lock+0xe/0x30
[   22.572003]  [<ffffffff8105b1a4>] ? set_memory_x+0x44/0x50
[   22.572003]  [<ffffffff810d97b0>] ? unset_module_init_ro_nx+0x70/0x80
[   22.572003]  [<ffffffff810ddf43>] ? load_module+0x22d3/0x26b0
[   22.572003]  [<ffffffff810d9880>] ? store_uevent+0x40/0x40
[   22.572003]  [<ffffffff810de48d>] ? SyS_finit_module+0x7d/0xa0

[ 22.572003] [<ffffffff8152314d>] ?system_call_fast_compare_end+0x10/0x15[ 22.572003] Code: cc 51 41 53 50 b8 17 00 00 00 0f 05 cc cc cc cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 18 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.572032] NMI backtrace for cpu 5
[   22.572032] CPU: 5 PID: 0 Comm: swapper/5 Not tainted 3.16.7-ckt11 #2

[ 22.572032] task: ffff8800f9fcc110 ti: ffff8800f9fd8000 task.ti:ffff8800f9fd8000[ 22.572032] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.572032] RSP: e02b:ffff8800f9fdbec8  EFLAGS: 00000246

[ 22.572032] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.572032] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.572032] RBP: 0000000000000005 R08: 0000000000000000 R09:0000000000000000[ 22.572032] R10: 000000988c176b26 R11: 0000000000000246 R12:ffff8800f9fd8000[ 22.572032] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9fdbfd8[ 22.572032] FS: 0000000000000000(0000) GS:ffff8800faaa0000(0000)knlGS:0000000000000000

[   22.572032] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.572032] CR2: 0000000000000000 CR3: 0000000001812000 CR4:0000000000042660

[   22.572032] Stack:

[ 22.572032] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.572032] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9fd8000[ 22.572032] ffff8800f9fd8000 ffff8800f9fdbfd8 00000000000000016bc6de14cc15d71d

[   22.572032] Call Trace:
[   22.572032]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.572032]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.572032]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.572032] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.560059] NMI backtrace for cpu 14
[   22.560059] CPU: 14 PID: 0 Comm: swapper/14 Not tainted 3.16.7-ckt11 #2

[ 22.560059] task: ffff8800f98001d0 ti: ffff8800f9810000 task.ti:ffff8800f9810000[ 22.560059] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.560059] RSP: e02b:ffff8800f9813ec8  EFLAGS: 00000246

[ 22.560059] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.560059] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.560059] RBP: 000000000000000e R08: 0000000000000000 R09:0000000000000000[ 22.560059] R10: 0000009855f87026 R11: 0000000000000246 R12:ffff8800f9810000[ 22.560059] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9813fd8[ 22.560059] FS: 0000000000000000(0000) GS:ffff8800fabc0000(0000)knlGS:ffff8800fabc0000

[   22.560059] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.560059] CR2: 00007fc0de81f018 CR3: 00000000f9593000 CR4:0000000000042660

[   22.560059] Stack:

[ 22.560059] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.560059] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9810000[ 22.560059] ffff8800f9810000 ffff8800f9813fd8 0000000000000001f278a4f63a568a9f

[   22.560059] Call Trace:
[   22.560059]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.560059]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.560059]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.560059] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.552131] NMI backtrace for cpu 22
[   22.552131] CPU: 22 PID: 0 Comm: swapper/22 Not tainted 3.16.7-ckt11 #2

[ 22.552131] task: ffff8800f9832be0 ti: ffff8800f9840000 task.ti:ffff8800f9840000[ 22.552131] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.552131] RSP: e02b:ffff8800f9843ec8  EFLAGS: 00000246

[ 22.552131] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.552131] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.552131] RBP: 0000000000000016 R08: 0000000000000000 R09:0000000000000000[ 22.552131] R10: 0000009856ec9426 R11: 0000000000000246 R12:ffff8800f9840000[ 22.552131] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9843fd8[ 22.552131] FS: 0000000000000000(0000) GS:ffff8800facc0000(0000)knlGS:ffff8800faea0000

[   22.552131] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.552131] CR2: 00007fc0dd94a000 CR3: 0000000004611000 CR4:0000000000042660

[   22.552131] Stack:

[ 22.552131] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.552131] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9840000[ 22.552131] ffff8800f9840000 ffff8800f9843fd8 00000000000000012aa03fc8b22f5a61

[   22.552131] Call Trace:
[   22.552131]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.552131]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.552131]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.552131] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.552049] NMI backtrace for cpu 2
[   22.552049] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 3.16.7-ckt11 #2

[ 22.552049] task: ffff8800f9f7a0d0 ti: ffff8800f9fc8000 task.ti:ffff8800f9fc8000[ 22.552049] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.552049] RSP: e02b:ffff8800f9fcbec8  EFLAGS: 00000246

[ 22.552049] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.552049] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.552049] RBP: 0000000000000002 R08: 0000000000000000 R09:0000000000000000[ 22.552049] R10: 000000985f44cf26 R11: 0000000000000246 R12:ffff8800f9fc8000[ 22.552049] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9fcbfd8[ 22.552049] FS: 0000000000000000(0000) GS:ffff8800faa40000(0000)knlGS:0000000000000000

[   22.552049] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.552049] CR2: 0000000000000000 CR3: 0000000001812000 CR4:0000000000042660

[   22.552049] Stack:

[ 22.552049] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.552049] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9fc8000[ 22.552049] ffff8800f9fc8000 ffff8800f9fcbfd8 00000000000000015a145ce4c0a041a1

[   22.552049] Call Trace:
[   22.552049]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.552049]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.552049]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.552049] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.552059] NMI backtrace for cpu 7
[   22.552059] CPU: 7 PID: 0 Comm: swapper/7 Not tainted 3.16.7-ckt11 #2

[ 22.552059] task: ffff8800f9fdeaa0 ti: ffff8800f9fe8000 task.ti:ffff8800f9fe8000[ 22.552059] RIP: e030:[<ffffffff810013aa>] [<ffffffff810013aa>]xen_hypercall_sched_op+0xa/0x20

[   22.552059] RSP: e02b:ffff8800f9febec8  EFLAGS: 00000246

[ 22.552059] RAX: 0000000000000000 RBX: ffffffff818efc40 RCX:ffffffff810013aa[ 22.552059] RDX: 0000000000000001 RSI: 0000000000000000 RDI:0000000000000001[ 22.552059] RBP: 0000000000000007 R08: 0000000000000000 R09:0000000000000000[ 22.552059] R10: 00000097f78e8426 R11: 0000000000000246 R12:ffff8800f9fe8000[ 22.552059] R13: 0000000000000000 R14: 00000000ffffffed R15:ffff8800f9febfd8[ 22.552059] FS: 0000000000000000(0000) GS:ffff8800faae0000(0000)knlGS:ffff8800faae0000

[   22.552059] CS:  e033 DS: 002b ES: 002b CR0: 0000000080050033

[ 22.552059] CR2: 000000000220b040 CR3: 0000000001812000 CR4:0000000000042660

[   22.552059] Stack:

[ 22.552059] 000000000000001d ffffffff818584a0 ffffffff81009d7cffffffff8101cfd9[ 22.552059] ffffffff818efc40 0000000000000000 ffffffff810aa88fffff8800f9fe8000[ 22.552059] ffff8800f9fe8000 ffff8800f9febfd8 000000000000000130854ba408763edd

[   22.552059] Call Trace:
[   22.552059]  [<ffffffff81009d7c>] ? xen_safe_halt+0xc/0x20
[   22.552059]  [<ffffffff8101cfd9>] ? default_idle+0x19/0xb0
[   22.552059]  [<ffffffff810aa88f>] ? cpu_startup_entry+0x38f/0x460

[ 22.552059] Code: cc 51 41 53 b8 1c 00 00 00 0f 05 41 5b 59 c3 cc cccc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc 51 41 53 b8 1d 00 00 000f 05 <41> 5b 59 c3 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

[   22.560052] NMI backtrace for cpu 0


Regards Johnny





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References:
- Re: [Xen-users] Xen bridging issue
  - From: Viktor Dukhovni
- Re: [Xen-users] Xen bridging issue
  - From: johnny Strom
- Re: [Xen-users] Xen bridging issue
  - From: Wei Liu
- Re: [Xen-users] Xen bridging issue
  - From: Viktor Dukhovni
- Re: [Xen-users] Xen bridging issue
  - From: Viktor Dukhovni

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