Re: APM support for IPoIB

[Bang Nguyen <bang.nguyen-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>]

  On 10/1/2012 4:53 PM, Jason Gunthorpe wrote:
> On Mon, Oct 01, 2012 at 03:23:38PM -0700, Bang Nguyen wrote:
>
>> Adding APM support for IPoIB seems like something worthwhile and
>> we're thinking about it..but are wondering why has hasn't been done
>> already..any comments/suggestions?
> I've been quite supportive of APM in the past, IMHO I think it is
> something unique to IB that should be exploited as often as possible.
>
> Improving the RDMA-CM to setup APM at all would be a great first step,
> but some SM work is also ultimately needed to get sufficiently
> independent/redundant paths.
Our version of OFED has full support of APM in RDMA-CM and it's being 
used by SDP and RDS..
IPoIB is using CM instead of RDMA CM so we can not leverage it..IPoIB 
APM will need to have its own implementation..
> I would like to see the full APM support eventually implemented - this
> would be fail over across adaptor ports, where each port is on a
> seperate subnet - so you get full redundancy of cabling, switching and
> management software.
>
> Jason

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