[openib-general] Re: [PATCH] libmthca: fix wqe post

[Viswanath Krishnamurthy]

Thanks.. yes that was the problem...

The panic was happening when I was getting these errors and pressed Ctrl-C 
on
the server. This may be an error path issue. 

I am not seeing it now..

-Viswa


On 9/13/05, Roland Dreier <rolandd at cisco.com> wrote:
> 
> Viswanath> When I ran the cmpost program which I sent you, I
> Viswanath> started getting errors from the mthca library even for
> Viswanath> smaller number of connections (Earlier it was
> Viswanath> working).
> 
> Yeah, I found another problem with your cmpost program. I think
> you're setting the packet lifetime far too low. You have:
> 
> sa.packet_life_time = 2;
> 
> This ends up having the CM set an ACK timeout of something like 32
> microseconds, which is way too low. If you poll the send CQ, you'll
> probably see some "retries exceeded" errors. Setting the
> packet_life_time to something like 14 or 15 should work better.
> 
> Viswanath> Also it is now easier to create the panic when you kill
> Viswanath> the cmpost server program. The panic may be happening
> Viswanath> on an error path.
> 
> I still have never been able to reproduce this panic (and believe me,
> I've killed the cmpost program many time). Anyway, I'll take a look
> at the traceback and see if anything jumps out at me.
> 
> - R.
>
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