Date:   Thu, 4 Apr 2019 07:28:17 -0700
From:   VDR User <user.vdr@...il.com>
To:     Heiner Kallweit <hkallweit1@...il.com>
Cc:     Alexander Duyck <alexander.h.duyck@...ux.intel.com>,
        netdev@...r.kernel.org
Subject: Re: r8169 driver from kernel 5.0 crashing - napi_consume_skb

Hi,

Unfortunately I have to report that the crashing has resurfaced. I'm
currently using kernel 5.0 with Heiner's fix applied. In the last few
days I've had the crash occur 4 times now. I'm not sure how to further
investigate this but I'm guessing a patch that adds more debugging
output will be needed to track down where exactly things go bad and
hopefully what exactly is triggering it? In 2 cases there was
bi-directional traffic, in the other 2 cases there was only incoming
traffic. In all cases the nic became unresponsive, all connections to
the box died/timed out. After roughly 10 minutes the nic came back to
life on its own without my intervention. The odd thing I noticed was
the dmesg log showing the problem only shows up once in dmesg instead
of 4 times to coincide with the 4 crashes/freezes. I don't think the
box reboot itself, and if it did then dmesg should be clean.

Please let me know what you think and how we should proceed. Thanks!
Derek

[1126370.489823] ------------[ cut here ]------------
[1126370.489905] NETDEV WATCHDOG: enp4s0 (r8169): transmit queue 0 timed out
[1126370.489989] WARNING: CPU: 1 PID: 0 at net/sched/sch_generic.c:461
dev_watchdog+0x1bb/0x1e0
[1126370.490040] Modules linked in: snd_hda_codec_realtek
snd_hda_codec_generic snd_hda_codec_hdmi ohci_pci snd_hda_intel
snd_hda_codec snd_hwdep snd_hda_core ohci_hcd ehci_pci ehci_hcd
xhci_pci xhci_hcd snd_pcm usbcore snd_timer usb_common snd soundcore
nfsd auth_rpcgss oid_registry lockd grace sunrpc ip_tables x_tables
ipv6
[1126370.490118] CPU: 1 PID: 0 Comm: swapper/1 Not tainted 5.0.0-amd #3
[1126370.490152] Hardware name: ECS A75F-A/A75F-A, BIOS 4.6.5 09/14/2011
[1126370.490187] EIP: dev_watchdog+0x1bb/0x1e0
[1126370.490220] Code: 8b 50 3c 89 f8 e8 3d aa 0a 00 8b 7e f4 eb a4 89
f8 c6 05 e7 1c 6d c1 01 e8 72 4f fd ff 53 50 57 68 78 05 66 c1 e8 e5
ac ba ff <0f> 0b 83 c4 10 eb c9 eb 1c 8d b4 26 00 00 00 00 8d b4 26 00
00 00
[1126370.490271] EAX: 0000003b EBX: 00000000 ECX: 00000800 EDX: 00000103
[1126370.490305] ESI: f4cb8264 EDI: f4cb8000 EBP: f4c99f74 ESP: f4c99f4c
[1126370.490339] DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 EFLAGS: 00210296
[1126370.490374] CR0: 80050033 CR2: b719b10c CR3: 0d7a6000 CR4: 00000690
[1126370.490407] Call Trace:
[1126370.490439]  <SOFTIRQ>
[1126370.490473]  ? qdisc_put_unlocked+0x40/0x40
[1126370.490508]  call_timer_fn+0x19/0xa0
[1126370.490541]  run_timer_softirq+0x337/0x380
[1126370.490572]  ? qdisc_put_unlocked+0x40/0x40
[1126370.490601]  ? rcu_process_callbacks+0xcb/0x380
[1126370.490630]  ? net_rx_action+0x152/0x220
[1126370.490660]  __do_softirq+0xd6/0x21c
[1126370.490688]  ? __irqentry_text_end+0x18/0x18
[1126370.490718]  call_on_stack+0x10/0x60
[1126370.490746]  </SOFTIRQ>
[1126370.490774]  ? irq_exit+0x91/0xc0
[1126370.490802]  ? smp_apic_timer_interrupt+0x56/0xa0
[1126370.490831]  ? apic_timer_interrupt+0xd5/0xdc
[1126370.490863]  ? acpi_idle_enter_s2idle+0x60/0x60
[1126370.490893]  ? cpuidle_enter_state+0x122/0x360
[1126370.490922]  ? tick_nohz_idle_stop_tick+0x27b/0x2a0
[1126370.490952]  ? cpuidle_enter+0xf/0x20
[1126370.490981]  ? call_cpuidle+0x1c/0x40
[1126370.491011]  ? do_idle+0x1e6/0x220
[1126370.491039]  ? cpu_startup_entry+0x25/0x40
[1126370.491068]  ? start_secondary+0x1a5/0x220
[1126370.491097]  ? startup_32_smp+0x15f/0x164
[1126370.491126] ---[ end trace 8a26c9ba9d20b87b ]---

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