[ofa-general] Re: Re: [PATCH] for-2.6.23 ib/umad: add partition support

[Michael S. Tsirkin]

> Quoting Sean Hefty <sean.hefty at intel.com>:
> Subject: RE: Re: [PATCH] for-2.6.23 ib/umad: add partition support
> 
> >This assumes an open file desriptor per-pkey, so the proposed API
> >extension umad_set_pkey would have to be changed to be per-port rather
> >than per-mad. But I think this is a better API, too: most apps
> >likely work within a single partition.
> 
> I don't think this is true for apps that use the userspace MAD interface (e.g.
> opensm).

SM (rather, SA) can just open file descriptor per pkey - it created them itself,
and there's a small number of partitions.

> Beyond that, this approach doesn't work for receiving MADs on different PKeys.

Yes, it does: we just filter out the MADs where pkey does not match.

I think that most other apps (besides SA) should really treat
each partition as a separate network. So getting MADs for a specific
pkey, rather than all pkeys, makes total sense to me.

-- 
MST