On Thu, Mar 21, 2013 at 11:57:32AM -0600, Jason Gunthorpe wrote: > On Thu, Mar 21, 2013 at 07:42:37PM +0200, Michael S. Tsirkin wrote: > > > It doesn't actually, and our app would sometimes write to these pages. > > It simply does not care which version does the remote get in this case > > since we track writes and resend later. > > Heh, somehow I thought you might say that :) > > A new flag seems like the only way then - maybe: > IBV_ACCESS_NON_COHERENT - The adaptor and the CPU do not share > a coherent view of registered memory. Memory writes from the CPU > after ibv_reg_mr completes may not be reflected in the memory > viewed by the adaptor. > > Can only be combined with read only access permissions. > > Jason
I kind of like _GIFT for name, gifts are nice :) But yes that's exactly the semantics we need. -- MST
