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    SubjectRe: kernel 4.18.5 Realtek 8111G network adapter stops responding under high system load
    Date
    Hi,

    Today I had the network adapter problems again. So the patch doesn't seem to change anything regarding this problem. This week my time is unfortunately very limited, but I will try to find some time next weekend to look a bit more into the issue.

    Thanks in advance,
    David Arendt


    Maciej S. Szmigiero – Sun, 16. September 2018 2:12
    > [ I've added Realtek Linux NIC and netdev mailing lists to CC ]
    >
    > Hi David,
    >
    > On 15.09.2018 23:23, David Arendt wrote:
    > > Hi,
    > >
    > > just a follow up:
    > >
    > > In kernel 4.18.8 the behaviour is different.
    > >
    > > The network is not reachable a number of times, but restarting to be
    > > reachable by itself before it finally is no longer reachable at all.
    > >
    > > Here the logging output:
    > >
    > > Sep 15 17:44:43 server kernel: NETDEV WATCHDOG: enp3s0 (r8169): transmit
    > > queue 0 timed out
    > > Sep 15 17:44:43 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:10:26 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:12:24 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:13:19 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:14:48 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:20:24 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:34:19 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:43:43 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 18:46:26 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > > Sep 15 19:00:24 server kernel: r8169 0000:03:00.0 enp3s0: link up
    > >
    > > From 17:44 ro 18:46 the network is recovering automatically. After the
    > > up from 19:00, the network is no longer reachable without any additional
    > > message.
    > >
    > > If looking at ifconfig, the counter for TX packets is incrementing, the
    > > counter for RX packets not.
    > >
    > > Here again the driver from 4.17.14 is working flawlessly.
    >
    > Could you please try this patch on top of 4.18.8:
    > git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/
    >
    > In my case the problem fixed by the above commit was only limited to
    > bad TX performance but my r8169 NIC models were different from what
    > you have.
    >
    > If this does not help then try bisecting the issue
    > (maybe limited to drivers/net/ethernet/realtek/r8169.c to save time).
    > If the NIC dies after a heavy load it might be possible to generate
    > such load quickly by in-kernel pktgen.
    >
    > If that's not possible then at please least compare NIC register
    > values displayed by "ethtool -d enp3s0" between working and
    > non-working kernels.
    >
    > > Thanks in advance,
    > > David Arendt
    >
    > Maciej
    >
    > >
    > >
    > > On 9/4/18 8:19 AM, David Arendt wrote:
    > >> Hi,
    > >>
    > >> When using kernel 4.18.5 the Realtek 8111G network adapter stops
    > >> responding under high system load.
    > >>
    > >> Dmesg is showing no errors.
    > >>
    > >> Sometimes an ifconfig enp3s0 down followed by an ifconfig enp3s0 up is
    > >> enough for the network adapter to restart responding. Sometimes a reboot
    > >> is necessary.
    > >>
    > >> When copying r8169.c from 4.17.14 to the 4.18.5 kernel, networking works
    > >> perfectly stable on 4.18.5 so the problem seems r8169.c related.
    > >>
    > >> Here the output from lshw:
    > >>
    > >> *-pci:2
    > >> description: PCI bridge
    > >> product: 8 Series/C220 Series Chipset Family PCI Express
    > >> Root Port #3
    > >> vendor: Intel Corporation
    > >> physical id: 1c.2
    > >> bus info: pci@0000:00:1c.2
    > >> version: d5
    > >> width: 32 bits
    > >> clock: 33MHz
    > >> capabilities: pci pciexpress msi pm normal_decode
    > >> bus_master cap_list
    > >> configuration: driver=pcieport
    > >> resources: irq:18 ioport:d000(size=4096)
    > >> memory:f7300000-f73fffff ioport:f2100000(size=1048576)
    > >> *-network
    > >> description: Ethernet interface
    > >> product: RTL8111/8168/8411 PCI Express Gigabit Ethernet
    > >> Controller
    > >> vendor: Realtek Semiconductor Co., Ltd.
    > >> physical id: 0
    > >> bus info: pci@0000:03:00.0
    > >> logical name: enp3s0
    > >> version: 0c
    > >> serial: <hidden>
    > >> size: 1Gbit/s
    > >> capacity: 1Gbit/s
    > >> width: 64 bits
    > >> clock: 33MHz
    > >> capabilities: pm msi pciexpress msix vpd bus_master
    > >> cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt
    > >> 1000bt-fd autonegotiation
    > >> configuration: autonegotiation=on broadcast=yes
    > >> driver=r8169 driverversion=2.3LK-NAPI duplex=full
    > >> firmware=rtl8168g-2_0.0.1 02/06/13 latency=0 link=yes multicast=yes
    > >> port=MII speed=1Gbit/s
    > >> resources: irq:18 ioport:d000(size=256)
    > >> memory:f7300000-f7300fff memory:f2100000-f2103fff
    > >>
    > >> Thanks in advance for looking into this,
    > >>
    > >> David Arendt
    > >>
    > >>
    > >

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