[openib-general] [PATCH 0/4] SA path record caching

[Sean Hefty]

Or Gerlitz wrote:
> I see. The CMA code (cma_resolve_ib_route) just calls ib_get_path_rec 
> and if the latter fails returns error to its consumer. Two questions 
> come into my mind here: a) is it the final version or you plan to extend 
> the CMA to directly query the SA in that case? b) the code of 
> ib_get_path_rec seems to just search the path in the index and return 
> -ENODATA if nothing is found, does it also trigger an SA lookup for this 
> path?

The CMA will eventually be extended to query the SA directly if the local 
look-up fails.  The intent is to keep these failures hidden from the end-user.

The SA cache does not use a failed lookup as a trigger to update its cache, but 
that could be added.  My initial reaction is that it makes sense to do this.

- Sean