[Users] IB Virtual Lanes

[Hal Rosenstock]

SLs are mapped to VLs so it's exposed based on that mapping. SL is part of
the PathRecor, /MultiPathRecord, and MCMemberRecord SA queries.

There is documentation in IBA volume 1 in terms of both SLs and VLs as well
as QoS Annex as well as those SA records.

OpenSM supports both basic QoS as well as support for QoS Annex which
allows for SL to be configured for path record queries which is basic
mechanism by which application/ULP obtains the needed info (along with rate
& MTU). There is OpenSM documentation on this doc/qos-config.txt (basic)
and doc/QoS_management_in_OpenSM.txt (QoS Annex support).

IPoIB kernel ULP supports SL per partition (via child interface).

-- Hal

On Mon, May 11, 2015 at 1:05 PM, Amir Shehata <
amir.shehata.whamcloud at gmail.com> wrote:

> Hello,
>
> I have been looking for documentation on how to use IB Virtual Lanes, but
> I could only find general explanation of how virtual lanes work.
>
> how do virtual lanes get exposed to the application, and how does the
> application make use of them?
>
> Can virtual lanes be used from kernel space?
>
> Any pointers to docs or explanation, would be very helpful.
>
> thanks
> amir
>
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