[ofa-general] message is received but sender report error.

[Tang, Changqing]

> -----Original Message-----
> From: Roland Dreier [mailto:rdreier at cisco.com] 
> Sent: Thursday, October 25, 2007 12:14 PM
> To: Tang, Changqing
> Cc: general at lists.openfabrics.org
> Subject: Re: [ofa-general] message is received but sender 
> report error.
> 
> 
>  > the receiver has successfully got an event, and  > 
> (compl.opcode&IBV_WC_RECV_RDMA_WITH_IMM) is true.
>  >
>  > However, the sender got an completion with 
> compl.status=12, which is  > retry count exceeded, how is 
> this possible ?
>  > One thing I can tell is that receiver destroy the QP after 
> receiving  > above message.
> 
> I guess maybe it's possible to destroy the QP before the ACK 
> is generated?  Maybe the first ACK is dropped for some reason 
> and the responder QP is gone before it can resend the ACK?

If this is the case, how would we fix the problem ? It's hard for us to
delay to destroy the QP, because we don't know how long to delay.
The other way is to do something from the driver, or firmware.

--CQ


> 
>  - R.
>