On 10/01/2023 15:43, Joao Martins wrote: > On 10/01/2023 12:37, David Woodhouse wrote: >> So for now we'll limit the >> back ends to mapping a single grant ref at a time. >> > Which is not a practical limitation right now.
Gah, no. xen-usb and 9p do use possibly-discontiguous grant maps :( > One grant ref is actually fine > for the everything else that is not the block shared-ring. Xen devices in > Qemu > seem to be using the legacy backend interface, and thus (un)mapping one grant > at > a time, or otherwise copying grefs. >
