On Thu, 2017-04-13 at 22:40 -0600, Logan Gunthorpe wrote: > > On 13/04/17 10:16 PM, Jason Gunthorpe wrote: > > I'd suggest just detecting if there is any translation in bus > > addresses anywhere and just hard disabling P2P on such systems. > > That's a fantastic suggestion. It simplifies things significantly. > Unless there are any significant objections I think I will plan on > doing > that.
I object. > > On modern hardware with 64 bit BARs there is very little reason to > > have translation, so I think this is a legacy feature. > > Yes, p2pmem users are likely to be designing systems around it (ie > JBOFs) and not trying to shoehorn it onto legacy architectures. > > At the very least, it makes sense to leave it out and if someone > comes > along who cares they can put in the effort to support the address > translation. > > Thanks, > > Logan
