On Mon, Mar 11, 2013 at 01:17:19PM -0400, Michael R. Hines wrote: > On 03/11/2013 01:05 PM, Michael S. Tsirkin wrote: > >Well that's exactly the question. As far as I remember the RDMA > >memory model, you need to know a key and address to execute RDMA > >writes. Remote memory also needs to be locked, so you need some > >mechanism to lock chunks of memory, do RDMA write and unlock when > >done. > > Yes, memory is registered before the write occurs - that's is all > taken care of in rdma.c (patch #04/10) > > Same answer for the SEND messages: memory for each send must be > registered before you send. > > The pinning (mlock()) is already handled by libibverbs (by calling > the function ibv_reg_mr()) - standard infiniband protocol > initialization. > > - Michael
Yes but the document should describe when is the destination memory registered and how are keys/addresses passed back to source.
