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

[Viswanath Krishnamurthy]

Just wanted to confirm kernel mthca also works fine..

Thanks Roland & Michael

-Viswa


On 9/13/05, Viswanath Krishnamurthy <viswa.krish at gmail.com> wrote:
> 
> 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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