Re: This igb change makes my igb not working anymore - Re: regression in igb/clang?

From: alan somers <asomers_at_gmail.com>
Date: Thu, 31 Dec 2015 10:15:06 -0700
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=205759

On Thu, Dec 24, 2015 at 9:46 AM, Sean Bruno <sbruno_at_freebsd.org> wrote:
> <top posting for maximal annoyance>
>
> Please create/update/point-me-at a bugzilla issue with all this information.
>
> sean
>
> On 12/22/15 08:37, Alan Somers wrote:
>> I'm experiencing the same problem, and I can confirm that Alexander's
>> workaround fixes it.  Here is some more information:
>>
>> * I see the exact same problem on two different systems, both with
>> S5520HC motherboards.
>> * Both systems have two igb ports, and igb1 works on both.  Only igb0 is broken.
>> * Disabling tso, lro, rxcsum, and txcsum has no effect.
>> * tcpdump reveals that igb0 transmits successfully, but fails to receive
>> * Curiously, "netstat -I igb0" shows nonzero values for Ipkts, even
>> though "tcpdump  -i igb0" shows no inbound packets at all.
>> * I can't really tell if IPv4 or IPv6 are working, because even ARP
>> doesn't work.
>> * SVN revisions 291495 and 292570 are both bad.  I don't know any
>> recent good revision.
>>
>> -Alan
>>
>> On Thu, Nov 19, 2015 at 11:21 PM, Alexander Leidinger
>> <Alexander_at_leidinger.net> wrote:
>>> Dual stack.
>>> Ping was on ipv4, no answer. Without the line I get the answer.
>>> I have not tried a ping6.
>>> --
>>> Send from a mobile device, please forgive brevity and misspelling.
>>>
>>>
>>> Gesendet mit AquaMail für Android
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>>>
>>> Am 20. November 2015 02:07:11 schrieb Eric Joyner <ricera10_at_gmail.com>:
>>>
>>>> Are you using IPv6?
>>>>
>>>> On Thu, Nov 19, 2015 at 12:42 PM Alexander Leidinger <
>>>> Alexander_at_leidinger.net> wrote:
>>>>
>>>>> On Wed, 11 Nov 2015 11:45:32 +0100
>>>>> Alexander Leidinger <Alexander_at_Leidinger.net> wrote:
>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I' updated a system with -current as of r287323 (end August) to
>>>>>> r290633 (yesterday).
>>>>>>
>>>>>> Result: no network connection (not even ping) on igb.
>>>>>> Ping internally (local addresses) works, anything outgoing/incoming
>>>>>> doesn't.
>>>>>
>>>>> And this is the function which causes it:
>>>>> e1000_rx_fifo_flush_82575(&adapter->hw);
>>>>>
>>>>> If I comment it out in if_igb.c, the network card works again.
>>>>>
>>>>> Full quote below for the PCI ID of my card in case it helps for fixing
>>>>> the issue.
>>>>>
>>>>> Bye,
>>>>> Alexander.
>>>>>
>>>>>> I disabled HW support (tso4, lro, rxcsum, txcsum): doesn't help.
>>>>>>
>>>>>> Did I miss some known defect/workaround?
>>>>>>
>>>>>> Anything I should test/provide besides what is below?
>>>>>>
>>>>>> The igb device is a:
>>>>>> ---snip---
>>>>>> igb0_at_pci0:1:0:0: class=0x020000 card=0x34e28086 chip=0x10a78086
>>>>>> rev=0x02 hdr=0x00 ---snip---
>>>>>>
>>>>>> My src.conf:
>>>>>> ---snip---
>>>>>> WITH_IDEA=yes
>>>>>> WITHOUT_PROFILE=yes
>>>>>> CFLAGS+=-DFTP_COMBINE_CWDS
>>>>>> MALLOC_PRODUCTION=yes
>>>>>> LOADER_FIREWIRE_SUPPORT=yes
>>>>>> #WITH_FAST_DEPEND=yes
>>>>>> ---snip---
>>>>>>
>>>>>> My buildworld related config in make.conf:
>>>>>> ---snip---
>>>>>> CFLAGS+= -O2 -pipe
>>>>>> COPTFLAGS= -O2 -pipe
>>>>>> #CPUTYPE?=core2
>>>>>> #WITH_CCACHE_BUILD=yes
>>>>>> #.if (!empty(.CURDIR:M/usr/src*)
>>>>>> || !empty(.CURDIR:M/usr/obj*)|| !empty(.CURDIR:M/space/system/usr_obj*))
>>>>>> #.if !defined(NOCCACHE) && exists(/usr/local/libexec/ccache/world/cc)
>>>>>> #CC:=${CC:C,^cc,/usr/local/libexec/ccache/world/cc,1}
>>>>>> #CXX:=${CXX:C,^c\+\+,/usr/local/libexec/ccache/world/c++,1} #.endif
>>>>>> #.endif
>>>>>> ---snip---
>>>>>>
>>>>>> The commented out parts were active initially, but then I commented
>>>>>> them out, cleaned out /usr/obj (rm -r) and rebuild/reinstall to make
>>>>>> sure it's not due to them (CPUTYPE commented out due to the fact that
>>>>>> there's a new compiler, and I use zsh and there was a commit talking
>>>>>> about zsh and CPUTYPE workaround).
>>>>>>
>>>>>> Bye,
>>>>>> Alexander.
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> http://www.Leidinger.net Alexander_at_Leidinger.net: PGP 0xC773696B3BAC17DC
>>>>> http://www.FreeBSD.org    netchild_at_FreeBSD.org  : PGP 0xC773696B3BAC17DC
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Received on Thu Dec 31 2015 - 16:15:08 UTC

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