[openib-general] Re: How to debug QP INIT->RTR -22 error

[Michael S. Tsirkin]

Quoting r. Steve Wooding <steve_wooding at keysounds.co.uk>:
> Subject: How to debug QP INIT->RTR -22 error
> 
> Hi there,
> 
> I'm trying to make a QP connection using the CM, but the active side 
> cannot get to the RTR state. ibv_modify_qp returns errorno -22, invalid 
> argument.
> 
> What would the best way to find out exactly what the error is and help 
> me fix my app (just to say, it is only my app that's broken, nothing 
> else)? Would turning kernel debugging on be helpful at all?
> 
> Thanks everyone,
> 
> 
> Steve.

Yes, enabling debug messages in mthca is typically helpful.
The relevant code with tests is in mthca_qp.c, function mthca_modify_qp,
and in uverbs_cmd.c, ib_uverbs_modify_qp.

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MST