[openib-general] libmthca error codes question

[Kyle Schochenmaier]

I have come across some error codes which are not entirely documented 
(or at least very well hidden)..
They are generated when I try to send via rdma using uverbs interface on 
mthca drivers.

When polling for work completions, I get the following behavior, and 
have not been able to figure out if they are related, and/or what they 
actually mean.

( I'm polling using ibv_poll_cq() inside a loop)
 I receive these two error values/codes for the ibv_wc.status variable:

IBV_WC_LOC_PROT_ERR
IBV_WC_WR_FLUSH_ERR  (after the first one, all of the status fields are 
this)

Is the LOC_PROT_ERR being generated due to some wrong access flags for 
the queue pair upon initialization?
I can send/recv fine on the same queue pair when not using rdma, so I'm 
somewhat confused about why I'd not get this error elsewhere.

what causes the two error codes? 


thanks,

- Kyle

-- 
Kyle Schochenmaier
kschoche at scl.ameslab.gov
Research Assistant, Dr. Brett Bode
AmesLab - US Dept.Energy
Scalable Computing Laboratory