[openib-general] Re: SA cache design

[Michael S. Tsirkin]

Quoting Sean Hefty <mshefty at ichips.intel.com>:
> > 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.

-- 
MST