[openib-general] Re: SA cache design

[Sean Hefty]

Michael S. Tsirkin wrote:
>>>To keep the design as flexible as possible, my plan is to implement the 
>>>cache in userspace.  The interface to the cache would be via MADs.  
>>>Clients would send their queries to the sa_cache instead of the SA 
>>>itself.  The format of the MADs would be essentially identical to those 
>>>used to query the SA itself.  Response MADs would contain any requested 
>>>information.  If the cache could not satisfy a request, the sa_cache 
>>>would query the SA, update its cache, then return a reply.
> 
> 
> Bouncing queries required for e.g. IPoIB or SDP
> to userspace seems like a deadlock scenario in case userspace
> is located e.g. on an NFS share.

The SA itself is implemented in userspace.  I don't see any issue here.

- Sean