[Xen-devel] xen + i40e: transmit queue timeout

["Andreas Kinzler" <hfp@xxxxxxxxx>]

I am currently researching a transmit queue timeout with Xen 4.8.2 and  
Intel X722 (i40e driver). The problem occurs with various linux versions  
(4.8.17, 4.13.16, SLES 15 port of i40e). The problem seems to be related  
to heavy forwarding/bridging as I am running a heavy network stress test  
in a domU (linux/pvm 4.13.16). It seems that if I run the same test  
without Xen, it works (not sure).
Any ideas?

Regards Andreas

[  441.823998] NETDEV WATCHDOG: eth0 (i40e): transmit queue 0 timed out
[  441.824033] ------------[ cut here ]------------
[  441.824046] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316  
dev_watchdog+0x218/0x220
[  441.824048] Modules linked in: i40e nf_conntrack_ipv4 nf_defrag_ipv4  
xt_conntrack nf_conntrack xt_physdev br_netfilter bridge stp llc xt_tcpudp  
iptable_filter ip_tables x_tables binfmt_misc tun mlx5_core
[  441.824074] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.13.16-ak2 #1
[  441.824077] Hardware name: Supermicro Super Server/X11SPi-TF, BIOS 2.0  
11/29/2017
[  441.824079] task: ffffffff81810480 task.stack: ffffffff81800000
[  441.824084] RIP: e030:dev_watchdog+0x218/0x220
[  441.824087] RSP: e02b:ffff88005d203e68 EFLAGS: 00010296
[  441.824091] RAX: 0000000000000038 RBX: 0000000000000000 RCX:  
000000000000003e
[  441.824093] RDX: 0000000000000000 RSI: ffff88005d203ce4 RDI:  
0000000000000004
[  441.824095] RBP: ffff88005d203e98 R08: ffff8800571ae200 R09:  
ffff880056c00248
[  441.824097] R10: 0000000000000082 R11: 0000000000000040 R12:  
ffff880052da9f40
[  441.824099] R13: 0000000000000000 R14: ffff880055d04800 R15:  
0000000000000080
[  441.824112] FS:  0000000000000000(0000) GS:ffff88005d200000(0000)  
knlGS:ffff88005d200000
[  441.824115] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[  441.824117] CR2: 00007f22b20ed3a0 CR3: 00000000518d1000 CR4:  
0000000000042660
[  441.824121] Call Trace:
[  441.824123]  <IRQ>
[  441.824130]  ? qdisc_rcu_free+0x40/0x40
[  441.824133]  ? qdisc_rcu_free+0x40/0x40
[  441.824140]  call_timer_fn.isra.5+0x1f/0x90
[  441.824144]  expire_timers+0x99/0xb0
[  441.824148]  run_timer_softirq+0x7b/0xc0
[  441.824155]  ? handle_percpu_irq+0x35/0x50
[  441.824159]  ? generic_handle_irq+0x1d/0x30
[  441.824166]  ? __evtchn_fifo_handle_events+0x142/0x160
[  441.824170]  __do_softirq+0xe5/0x200
[  441.824174]  irq_exit+0xb1/0xc0
[  441.824179]  xen_evtchn_do_upcall+0x2b/0x40
[  441.824186]  xen_do_hypervisor_callback+0x1e/0x30
[  441.824188]  </IRQ>
[  441.824193]  ? xen_hypercall_sched_op+0xa/0x20
[  441.824197]  ? xen_hypercall_sched_op+0xa/0x20
[  441.824204]  ? xen_safe_halt+0x10/0x20
[  441.824207]  ? default_idle+0x9/0x10
[  441.824210]  ? arch_cpu_idle+0xa/0x10
[  441.824213]  ? default_idle_call+0x1e/0x30
[  441.824218]  ? do_idle+0x183/0x1b0
[  441.824222]  ? cpu_startup_entry+0x18/0x20
[  441.824226]  ? rest_init+0xcb/0xd0
[  441.824232]  ? start_kernel+0x399/0x3a6
[  441.824238]  ? x86_64_start_reservations+0x2a/0x2c
[  441.824241]  ? xen_start_kernel+0x54f/0x55b
[  441.824244] Code: 63 8e a0 03 00 00 eb 93 4c 89 f7 c6 05 89 22 3a 00 01  
e8 7c fc fd ff 89 d9 48 89 c2 4c 89 f6 48 c7 c7 58 3e 76 81 e8 84 3a bf ff  
<0f> ff eb c3 0f 1f 40 00 48 c7 47 08 00 00 00 00 55 48 c7 07 00
[  441.824306] ---[ end trace ae5cd79c539b9f32 ]---
[  441.824323] i40e 0000:19:00.0 eth0: tx_timeout: VSI_seid: 390, Q 0,  
NTC: 0x73, HWB: 0x73, NTU: 0x5d, TAIL: 0x73, INT: 0x1
[  441.824330] i40e 0000:19:00.0 eth0: tx_timeout recovery level 1,  
hung_queue 0

Attachment: kconfig-4.13.zip
Description: Zip archive

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/xen-devel