> > > > > What happens if guest attempts to register all its memory? > > > > > > > Then we loose, is not different from bare metal, reg_mr will pin all the > > RAM. > > We need to find a way to communicate to guests about amount > of memory they can pin.
dev_caps.max_mr_size is the way device limits guest driver. This value is controlled by the command line argument dev-caps-max-mr-size so we should be fine (btw, default value is 1<<32). > > > However this is only one scenario, and hopefully not much used > > for RoCE. (I know IPoIB does that, but it doesn't make sense to use it with > > RoCE). > > SRP does it too AFAIK. >
