em broken on current amd64
Mark R V Murray
markm at FreeBSD.org
Sat Sep 12 20:45:08 UTC 2015
> On 8 Sep 2015, at 19:02, Mark R V Murray <markm at FreeBSD.org> wrote:
>
>
>> On 8 Sep 2015, at 17:22, Sean Bruno <sbruno at freebsd.org> wrote:
>>
>>
>>>>>
>>>>> I’m also seeing breakage with the em0 device; this isn’t a kernel
>>>>> hang, it is a failure to move data after about 10-15 minutes. The
>>>>> symptom is that my WAN ethernet no longer moves traffic, no pings,
>>>>> nothing. Booting looks normal:
>>>>>
>>>>> em0: <Intel(R) PRO/1000 Network Connection 7.4.2> port
>>>>> 0x30c0-0x30df mem 0x50300000-0x5031ffff,0x50324000-0x50324fff irq
>>>>> 20 at device 25.0 on pci0 em0: Using an MSI interrupt em0: Ethernet
>>>>> address: 00:16:76:d3:e1:5b em0: netmap queues/slots: TX 1/1024, RX
>>>>> 1/1024
>>>>>
>>>>> Fixing it is as easy as …
>>>>>
>>>>> # ifconfig em0 down ; service ipfw restart ; ifconfig em0 up
>>>>>
>>>>> :-)
>>>>>
>>>>> I’m running CURRENT, r287538. This last worked of me a month or so
>>>>> ago at my previous build.
>>>>>
>>>>> M
>>>>>
>>>>
>>>>
>>>> Just so I'm clear, the original problem reported was a failure to
>>>> attach (you were among several folks reporting breakage). Is that fixed
>>>> ?
>>>
>>> I did not report the failure to attach, and I am not seeing it as I don’t
>>> think I built a kernel that had that particular failure. I am having the
>>> “failure after 10-15 minutes” problem; this is on an em0 device.
>>>
>>> M
>>>
>>
>>
>> Hrm, that's odd. That sounds like a hole where interrupts aren't being
>> reset for "reasons" that I cannot fathom.
>>
>> What hardware (pciconf -lv) does your system actually have? The em(4)
>> driver doesn't identify components which is frustrating.
>
> pciconf -lv output below:
>
> hostb0 at pci0:0:0:0: class=0x060000 card=0x514d8086 chip=0x29a08086 rev=0x02 hdr=0x00
> vendor = 'Intel Corporation'
> device = '82P965/G965 Memory Controller Hub'
> class = bridge
> subclass = HOST-PCI
I just caught this, on today’s build:
em0: Watchdog timeout Queue[0]-- resetting
Interface is RUNNING and ACTIVE
em0: TX Queue 0 ------
em0: hw tdh = 127, hw tdt = 139
em0: Tx Queue Status = -2147483648
em0: TX descriptors avail = 1012
em0: Tx Descriptors avail failure = 0
em0: RX Queue 0 ------
em0: hw rdh = 0, hw rdt = 1023
em0: RX discarded packets = 0
em0: RX Next to Check = 0
em0: RX Next to Refresh = 1023
[graveyard] /usr/ports 09:42 pm # uname -a
FreeBSD graveyard.grondar.org 11.0-CURRENT FreeBSD 11.0-CURRENT #0 r287705: Sat Sep 12 15:07:54 BST 2015 root at graveyard.grondar.org:/b/obj/usr/src/sys/G_AMD64_GATE amd64
M
--
Mark R V Murray
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