ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39

ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39

[Scott Harrison]

Hi,

I was asked to raise this issue here.

https://bugzilla.kernel.org/show_bug.cgi?id=86591

lspci ->

03:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
03:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)

With the fibre 10Gbs SFP occasionally on reboot we get

[   15.104726] ixgbe 0000:03:00.0 eth0: detected SFP+: 5                        
[   19.735155] ixgbe 0000:03:00.0 eth0: setup link failed with code -14  

Probably about 1 in 10 boots.  With the 1Gbs Copper SFP it works fine.  
kernel 3.14.8 worked fine, but on upgrading to 3.16.1 it fails in this way.  
I have narrowed it down to the commit

https://git.kernel.org/cgit/linux/kernel/git/stable/linux-stable.git/commit/?id=ee98b577e7711d5890ded2c7b05578a29512bd39

I don't know enough about the hardware to understand why the change 
sometimes causes the failure, and was hoping someone else would.  Reverting 
this commit on 3.16.1 fixes the issue.

If you need any more information please ask.

Scott.

-- 
Software Engineer

Cisco.com - http://www.cisco.com

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RE: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39

[Tantilov, Emil S]

>-----Original Message-----
>From: netdev-owner@vger.kernel.org [mailto:netdev-
>owner@vger.kernel.org] On Behalf Of Scott Harrison
>Sent: Thursday, October 23, 2014 7:06 AM
>To: netdev@vger.kernel.org
>Subject: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39
>
>Hi,
>
>I was asked to raise this issue here.
>
>https://bugzilla.kernel.org/show_bug.cgi?id=86591
>
>lspci ->
>
>03:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
>03:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
>
>With the fibre 10Gbs SFP occasionally on reboot we get
>
>[   15.104726] ixgbe 0000:03:00.0 eth0: detected SFP+: 5
>[   19.735155] ixgbe 0000:03:00.0 eth0: setup link failed with code -14

The error message is from an ethtool command. Where you trying to set the speed to a certain value?

Thanks,
Emil

Re: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39

[Scott Harrison]

Emil,

Sorry, I should have looked harder it happens as part of ifup eth0, we have 
"/sbin/ethtool -s eth0 autoneg on" in the interfaces file.

HTH.

Scott.

On Thu, Oct 23, 2014 at 07:48:32PM +0000, Tantilov, Emil S wrote:
>>-----Original Message-----
>>From: netdev-owner@vger.kernel.org [mailto:netdev-
>>owner@vger.kernel.org] On Behalf Of Scott Harrison
>>Sent: Thursday, October 23, 2014 7:06 AM
>>To: netdev@vger.kernel.org
>>Subject: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39
>>
>>Hi,
>>
>>I was asked to raise this issue here.
>>
>>https://bugzilla.kernel.org/show_bug.cgi?id=86591
>>
>>lspci ->
>>
>>03:00.0 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
>>03:00.1 Ethernet controller: Intel Corporation 82599EB 10-Gigabit SFI/SFP+ Network Connection (rev 01)
>>
>>With the fibre 10Gbs SFP occasionally on reboot we get
>>
>>[   15.104726] ixgbe 0000:03:00.0 eth0: detected SFP+: 5
>>[   19.735155] ixgbe 0000:03:00.0 eth0: setup link failed with code -14
>
>The error message is from an ethtool command. Where you trying to set the speed to a certain value?
>
>Thanks,
>Emil
>

-- 
Software Engineer

Cisco.com - http://www.cisco.com

This email may contain confidential and privileged material for the sole use of 
the intended recipient. Any review, use, distribution or disclosure by others 
is strictly prohibited. If you are not the intended recipient (or authorised to 
receive for the recipient), please contact the sender by reply email and delete 
all copies of this message.

For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/index.html

RE: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39

[Tantilov, Emil S]

>-----Original Message-----
>From: Scott Harrison [mailto:scoharr2@cisco.com]
>Sent: Friday, October 24, 2014 2:18 AM
>To: Tantilov, Emil S
>Cc: netdev@vger.kernel.org
>Subject: Re: ixgbe driver fails occasionally since ee98b577e7711d5890ded2c7b05578a29512bd39
>
>Emil,
>
>Sorry, I should have looked harder it happens as part of ifup eth0, we have
>"/sbin/ethtool -s eth0 autoneg on" in the interfaces file.

Well you can avoid this issue by removing this command since it is not needed for anything.
The interface will auto-negotiate by default.

We were able to reproduce this issue and will work on a fix.

Thanks a lot for reporting it.

Emil

>
>HTH.
>
>Scott.