[ofw] ib-diags: compatability issue with ibstat

[Hal Rosenstock]

On Fri, Sep 23, 2011 at 12:21 PM, Hefty, Sean <sean.hefty at intel.com> wrote:

> > > The only way to determine whether fdr10 is active or not is via the
> > > vendor proprietary MAD. That info may be reflected in some other API
> > > (and/or file) so that MAD does not need to be reissued. In a separate
> > > thread on linux-rdma, there was discussion on a couple of different
> > > ways to do that from verbs and in this thread that there's no sysfs
> > > equivalent in Windows. You've already stated that the Windows support
> > > is using libibverbs for libibumad support so it seems appropriate to
> > > me to do the same here (in Windows at least).
> >
> > The proper place for is_fdr10 is in libibumad (and then we wouldn't be
> > discussing libibverbs w/ibstat) but that was not done to avoid a
> > change to the umad port structure.
>
> ibstat determines is_fdr10 by reading a file.  That same data could just as
> easily be exported as a port attribute, which would make it belong to
> ibverbs, rather than umad.
>
> If the only point of exporting is_fdr10 from the kernel is for an ib
> management diag to display the value, then it's not a useful value for verbs
> applications.
>

fdr10 is in the same category as active_speed. What's the use for that other
than display ? Anyhow, display seems useful to me to know the local port
speed.

-- Hal
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