[Bug 208205] re0 watchdog timeout

From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 29 Jan 2022 02:31:10 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208205

amvandemore@gmail.com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |amvandemore@gmail.com

--- Comment #38 from amvandemore@gmail.com ---
Still present on 13.0-STABLE #0 stable/13-n248872-2c7441c86ef:

re1@pci0:5:0:0: class=0x020000 rev=0x15 hdr=0x00 vendor=0x10ec device=0x8168
subvendor=0x17aa subdevice=0x5094
    vendor     = 'Realtek Semiconductor Co., Ltd.'
    device     = 'RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller'
    class      = network
    subclass   = ethernet
    bar   [10] = type I/O Port, range 32, base 0x2000, size 256, enabled
    bar   [18] = type Memory, range 64, base 0xfd504000, size 4096, enabled
    bar   [20] = type Memory, range 64, base 0xfd500000, size 16384, enabled
    cap 01[40] = powerspec 3  supports D0 D1 D2 D3  current D0
    cap 05[50] = MSI supports 1 message, 64 bit
    cap 10[70] = PCI-Express 2 endpoint MSI 1 max data 128(128) RO
                 max read 4096
                 link x1(x1) speed 2.5(2.5) ASPM disabled(L0s/L1) ClockPM
disabled
    cap 11[b0] = MSI-X supports 4 messages, enabled
                 Table in map 0x20[0x0], PBA in map 0x20[0x800]
    ecap 0001[100] = AER 2 0 fatal 0 non-fatal 1 corrected
    ecap 0002[140] = VC 1 max VC0
    ecap 0003[160] = Serial 1 01000000684ce000
    ecap 0018[170] = LTR 1
    ecap 001e[178] = L1 PM Substates 1

I was able to reset it into a good working state(when interface was doing a
watchdog up/down about every 2 minutes) via
ifconfig re1 down ; sleep 10 ; ifconfig re1 up

Not sure if related but for some period of time prior to watchdog times the NIC
performance degrades to roughly half.  This could be some disk or other
bottleneck I haven't identified yet.

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