Hi, Ian. Thank You for tips. On Mon, Jul 13, 2015 at 12:04 PM, Ian Campbell <ian.campb...@citrix.com> wrote: > There is an additional quirk for a 1:1 mapped dom0 which is that we > don't actually decrease reservation when ballooning, but keep the 1:1 > mfn in anticipation of ballooning it back in later. Currently we have this quirk enabled in DomD (driver domain)
> If you can't arrange to use already ballooned buffers for your DMA > buffer then you will need to manually balloon it out before and balloon > it back in later. I've tried this and all is working (I can map and then unmap memory in both directions DomU -> DomD, DomD -> DomU) > You may also want to extend the dom0 1:1 quirk described above to your > 1:1 mapped domD. Currently this quirk is enabled in DomD. In this case I can map memory from DomU to DomD (as it done in all PV drivers). But is this quirk is enabled in DomU, I can also map memory from DomD to DomU. _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
