[openib-general] Re: Re: Re: [PATCH] change Mellanox SDP workaround toa moduleparameter

[Michael S. Tsirkin]

Quoting r. Sean Hefty <mshefty at ichips.intel.com>:
> Subject: Re: [openib-general] Re: Re: Re: [PATCH] change Mellanox SDP?workaround toa moduleparameter
> 
> Michael S. Tsirkin wrote:
> >Okay, but then we need to implement the REJ/retry sequence.
> >I think it affects at least CMA and maybe CM.
> 
> I believe that this sort of retry need to be initiated by the ULP.

Okay, but we still need the CM to generate the approriate REJ with code 26,
right?

> The CMA needs some additional work to permit re-using an rdma_cm_id after a 
> connection has been rejected, so that the user or CMA can modify the MTU 
> before trying to re-establish a connection.

Given that the issue only affects some hardware, it would be nice to somehow
hide this from ULPs, otherwise it seems unlikely that they will get it right.

-- 
Michael S. Tsirkin
Staff Engineer, Mellanox Technologies