[openib-general] [PATCH] agent: Add IB ping server agent

[Roland Dreier]

    Roland> One other thought just occurred to me -- what advantages
    Roland> does this vendor-specific ping MAD have over a LID-routed
    Roland> NodeDescription get query?

    Hal> No MKey issue is the first thing that comes to mind.

Hmm... is someone running their fabric with an M_Key protection level
above 1 going to want a backdoor query class without access control?
Especially if it's unconditionally enabled and reveals information
like hostname?

    Hal> Also, the ability to support various options such as: length
    Hal> based query/response

Given that MAD packets are always exactly 256 bytes long, is this useful?

 - R.