Re: [Xen-devel] WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316 dev_watchdog+0x217/0x220

[Steven Haigh <netwiz@xxxxxxxxx>]

Just wanted to give this a nudge to try and get some suggestions on
where to go / what to do about this.

On 28/05/17 09:44, Steven Haigh wrote:
> The last couple of days running on kernel 4.9.29 and 4.9.30 with Xen
> 4.9.0-rc6 I've had a number of ethernet lock ups that have taken my
> system off the network.
> 
> This is a new development - but I'm not sure if its kernel or xen related.
> 
> in dmesg, I see the following:
> WARNING: CPU: 0 PID: 0 at net/sched/sch_generic.c:316
> dev_watchdog+0x217/0x220
> NETDEV WATCHDOG: enp5s0 (r8169): transmit queue 0 timed out
> Modules linked in: bridge 8021q garp stp llc btrfs dm_mod
> crct10dif_pclmul ghash_clmulni_intel aesni_intel aes_x86_64 lrw gf128mul
> glue_helper ablk_helper cryptd raid456 async_raid6_recov async_memcpy
> async_pq ppdev iTCO_wdt async_xor xor iTCO_vendor_support async_tx
> raid6_pq pcspkr i2c_i801 i2c_smbus pl2303 usbserial sg lpc_ich mfd_core
> tpm_infineon parport_pc parport shpchp mei_me mei xenfs xen_privcmd
> ip_tables xfs libcrc32c raid1 sd_mod i915 i2c_algo_bit drm_kms_helper
> drm crc32c_intel serio_raw ahci libahci i2c_core r8169 mii sata_mv video
> xen_acpi_processor xen_pciback xen_netback xen_gntalloc xen_gntdev
> xen_evtchn ipv6 crc_ccitt autofs4
> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.30-1.el7xen.x86_64 #1
> Hardware name: Gigabyte Technology Co., Ltd. To be filled by
> O.E.M./Z68M-D2H, BIOS U1f 06/13/2012
> ffff880080203dd8 ffffffff81348dc5 ffff880080203e28 0000000000000000
> ffff880080203e18 ffffffff81081711 0000013c80203e10 0000000000000000
> ffff88000526a000 0000000000000001 0000000000000000 ffff88000526a000
> Call Trace:
> <IRQ>
> [<ffffffff81348dc5>] dump_stack+0x63/0x8e
> [<ffffffff81081711>] __warn+0xd1/0xf0
> [<ffffffff8108177f>] warn_slowpath_fmt+0x4f/0x60
> [<ffffffff81602e17>] dev_watchdog+0x217/0x220
> [<ffffffff81602c00>] ? dev_deactivate_queue.constprop.27+0x60/0x60
> [<ffffffff810e17ea>] call_timer_fn+0x3a/0x130
> [<ffffffff810e2c61>] run_timer_softirq+0x191/0x420
> [<ffffffff810d509a>] ? handle_percpu_irq+0x3a/0x50
> [<ffffffff810d07d2>] ? generic_handle_irq+0x22/0x30
> [<ffffffff816b0fe6>] __do_softirq+0xd6/0x287
> [<ffffffff81087705>] irq_exit+0xa5/0xb0
> [<ffffffff8141ab35>] xen_evtchn_do_upcall+0x35/0x50
> [<ffffffff816af50e>] xen_do_hypervisor_callback+0x1e/0x40
> <EOI>
> [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
> [<ffffffff810013aa>] ? xen_hypercall_sched_op+0xa/0x20
> [<ffffffff810f2239>] ? __tick_nohz_idle_enter+0x2c9/0x3c0
> [<ffffffff810230c0>] ? xen_safe_halt+0x10/0x20
> [<ffffffff816ada53>] ? default_idle+0x23/0xd0
> [<ffffffff810373bf>] ? arch_cpu_idle+0xf/0x20
> [<ffffffff816ade7c>] ? default_idle_call+0x2c/0x40
> [<ffffffff810bfc5a>] ? cpu_startup_entry+0x17a/0x210
> [<ffffffff816a1417>] ? rest_init+0x77/0x80
> [<ffffffff81d3f0e7>] ? start_kernel+0x435/0x442
> [<ffffffff81d3eaa0>] ? set_init_arg+0x55/0x55
> [<ffffffff81d3e5d6>] ? x86_64_start_reservations+0x2a/0x2c
> [<ffffffff81d4615c>] ? xen_start_kernel+0x547/0x553
> ---[ end trace 2f33c440640c78e5 ]---
> 
> All network activity out that ethernet port dies until either:
> 1) The ethernet cable is unplugged & replugged, or
> 2) I run: mii-tool -R enp5s0
> 
> Either causes the ethernet adapter to be reset.
> 
> Any suggestions if this is Xen or kernel related?
> 
> 
> 
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxx
> https://lists.xen.org/xen-devel
> 

-- 
Steven Haigh

Email: netwiz@xxxxxxxxx
Web: https://www.crc.id.au
Phone: (03) 9001 6090 - 0412 935 897

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