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Bug#615860: bnx2 adapter periodically dropping received packets (pause frames)



On 02/28/2011 03:21 PM, Joerg Morbitzer wrote:
> On 02/28/2011 03:14 PM, Ben Hutchings wrote:
>> On Mon, 2011-02-28 at 14:22 +0100, Joerg Morbitzer wrote:
>>> Package: bnx2
>>> Version: 2.6.32-5-amd64
>>> Severity: normal
>>>
>>>
>>> Hi all,
>>>
>>> on my two Debian 6.0 (Squeeze) servers from HP (ProLiant DL380 G7) I have
>>> issues with the on-board Broadcom NetXtreme II BCM5709 Gigabit 
>>> Ethernet adapters: they constantly drop received network packets, and the
>>> Cisco routing swtich 4948 is reporting pause frames coming from the
>>> network card during this time.
>>>
>>> I found the exact same bug report description including an upstream fix
>>> by David Miller here :
>>
>> I think that's a different bug.  And I don't see any fix by David Miller
>> there.
> 
> Hi Ben,
> 
> thanks for your replay. I thought there was an upstream fix due to this
> answer from Andy Gospodarek (Comment 30 in the Red Hat bug report).
> 
>>
>>> https://bugzilla.redhat.com/show_bug.cgi?id=640026
>>>
>>> They increased the ring buffer size as far as I understand. 
>> [...]
>>
>> They increased the maximum allowed RX descriptor ring size.  You should
>> first try changing the value to the current maximum yourself, with
>> ethtool -C.
> 
> Ok, thanks for the hint with "ethtool -G", I will try to increase the RX
> value from 255 to the maximum of 1020.

Just for info: increasing the RX descriptor ring size to 1020 probably
fixed this issue, they was no further incident so far.

Thanks for the hint,

kind regards, Joerg.








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