[ofa-general] Re: [RFC] [PATCH 0/3] 2.6.22 or 23 ib: add pathrecord cache

[Sean Hefty]

>We could solve this by implementing a process running on the same node as the
>SA.
>And it's probably not too hard to add a way for opensm to spit out
>the table into an external file when it gets a signal or something.

I agree that there are ways to solve this, but those solutions won't work with
existing SAs and define a new SA interface.  If we're willing to break
compatibility or add extensions, we could also extend the SA to provide better
support for caching.  For example, add a new 'path updated' trap.

IMO, I don't think that there's a huge issue initially populating the cache.
The problems all seem to fall into keeping it updated.  I originally thought
this would have been a bigger deal, but given that ipoib doesn't update its
cache, it doesn't seem to be an issue in practice.

- Sean