Jeff Squyres wrote:
Roland and I chatted on the phone today; I think I now understand
Roland's counter-proposal (I clearly didn't before). Let me try to
summarize:
1. Add a new verb for "set this userspace flag to 1 if mr X ever
becomes invalid"
2. Add a new verb for "no longer tell me if mr X ever becomes invalid"
(i.e., remove the effects of #1)
3. Add run-time query indicating whether #1 works
4. Add [optional] memory registration caching to libibverbs
Prior to talking to Roland, I had envisioned *one* flag in userspace
that indicated whether any memory registrations had become invalid.
Roland's idea is that there is one flag *per registration* -- you can
instantly tell whether a specific registration is valid.
Given this, let's keep the discussion going here in email -- perhaps
the teleconference next Monday may become moot.
I think the new proposal is good (but I am not MPI expert)
If we implement it soon we will be able to enable it in OFED 1.5 too
I think the cache in libibverbs can be delayed since it can be added
after the API will the kernel is avilable
Tziporet
_______________________________________________
general mailing list
general@lists.openfabrics.org
http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general
To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
