search for: virtqueue_add_first

...cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); This is something I didn't previously notice. As you always keep a single buffer in flight, you do not really need indirect at all. Just add all descriptors in the ring directly, then kick. E.g. virtqueue_add_first virtqueue_add_next virtqueue_add_last ? You also want a flag to avoid allocations but there's no need to do it per descriptor, set it on vq. -- MST

...cpu_relax(); > + else > + wait_event(vb->acked, virtqueue_get_buf(vq, &len)); This is something I didn't previously notice. As you always keep a single buffer in flight, you do not really need indirect at all. Just add all descriptors in the ring directly, then kick. E.g. virtqueue_add_first virtqueue_add_next virtqueue_add_last ? You also want a flag to avoid allocations but there's no need to do it per descriptor, set it on vq. -- MST

...39;t previously notice. >>>>> As you always keep a single buffer in flight, you do not >>>>> really need indirect at all. Just add all descriptors >>>>> in the ring directly, then kick. >>>>> >>>>> E.g. >>>>> virtqueue_add_first >>>>> virtqueue_add_next >>>>> virtqueue_add_last >>>>> >>>>> ? >>>>> >>>>> You also want a flag to avoid allocations but there's no need to do it >>>>> per descriptor, set it on vq. >&...

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks, instead of one by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages. Liang Li

This patch series enhances the existing virtio-balloon with the following new features: 1) fast ballooning: transfer ballooned pages between the guest and host in chunks, instead of one by one; and 2) cmdq: a new virtqueue to send commands between the device and driver. Currently, it supports commands to report memory stats (replace the old statq mechanism) and report guest unused pages. Liang Li