The only way to get an RNR-NAK when doing an RDMA WRITE operation is if the RDMA WRITE includes immediate data. If Ira is not using immediate data, then the cause of the local error cannot be due to an excessive number of RNR-NAKs.
In any event though, Roland points out that the verbs can distinguish between an RNR-NAK counter expiration (IBV_WC_RNR_RETRY_EXC_ERR) and a retry counter expiration (IBV_WC_RETRY_EXC_ERR). So my question is moot. -Paul > -----Original Message----- > From: [email protected] [mailto:linux-rdma- > [email protected]] On Behalf Of Albert Strasheim > Sent: Friday, July 27, 2012 10:33 AM > To: Paul Grun > Cc: Roland Dreier; Ira Weiny; [email protected] > Subject: Re: Work completion error: "transport retry counter exceeded" > > Hello > > On Fri, Jul 27, 2012 at 6:50 PM, Paul Grun <[email protected]> > wrote: > > Ira, are you by any chance sending immediate data with your RDMA Write? > > Out of curiosity, what would be the significance if the answer to this > question was yes? > > Regards > > Albert > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" in > the body of a message to [email protected] More majordomo info at > http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
