[Devel] atl1 (Attansic L1 Gigabit Ethernet) driver & TCP weirdness

[Vasily Averin]

just FYI: I've found this hardware locally, node is free for investigation.
I'm reinstalling Centos to this node right now and then I will try to reproduce 
reported issue.

thank you,
	Vasily Averin

On 01/30/2011 11:28 AM, Solar Designer wrote:
>> On 01/30/2011 11:08 AM, Vasily Averin wrote:
>>> could you please check 2.1.3 driver version?
>>> ftp://ftp.hogchain.net/pub/linux/attansic/atl1/centos5.2/
>
> For certain reasons, this is a bit time-consuming for me to test, but
> I'll leave your message flagged as needing further work in case I find
> time for it.
>
> On Sun, Jan 30, 2011 at 11:18:15AM +0300, Vasily Averin wrote:
>> btw. could you please try to decrease MTU to 1492?
>
> I've already tried lowering the MTU (1400, etc.) - this did not help.
>
>> 5. If you see this message (or lots of them) in your system log:
>>
>> atl1 0000:02:00.0: hw csum wrong, pkt_flag:1600, err_flag:80
>
> No, I am not seeing any messages like this.  No complaints from the
> driver at all.
>
> I think I need to emphasize that things work just fine from OpenVZ
> containers on the same system!  No problems at all.  The problem only
> shows up when transferring something from the "host system" (CT0).
> So it looks OpenVZ-related, not just driver-related.
>
> Thanks,
>
> Alexander
>