[ofa-general] Re: [PATCH v3] libibmad: Handle MAD redirection

[Hal Rosenstock]

On Wed, Jul 1, 2009 at 12:20 PM, Joachim Fenkes<FENKES at de.ibm.com> wrote:
> Hal Rosenstock <hal.rosenstock at gmail.com> wrote on 01.07.2009 17:54:41:
>
>> It does say that the LID might not be valid even though non-zero.
>
> Can you elaborate on that? I can't seem to find that in the spec.
> What I do find, though, is this:
>
> "If this value is non-zero, it is the DLID a requester _shall_ use to
> access the
> class services." -- v1.2, p736, line 7

Yes, that's same as v1.2.1 p.743 line 14.

>
> Which sounds to me like: If it's non-zero, it's valid and you must use it.

v1.2.1 p.743 line 17 goes on to say:
"The RedirectGID, the RedirectQP and RedirectP_Key from this redirect
response are all valid, but the RedirectSL, RedirectFL, RedirectTC, and
RedirectLID will in general not be valid; they must be replaced using a Path-
Record obtained from the SA."
Doesn't look like that was a change from v1.2 as there are no change bars.

-- Hal

>> I'm
>> thinking of the more general case (future) rather than just IBM eHCA
>> usage.
>
> I stopped thinking "eHCA only" two patches ago, don't worry ;)
>
> BTW, I'm going to be out of the office starting now and returning next
> Tuesday,
> so let's continue this discussion next week ;)
>
> Cheers,
>  Joachim
>