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-rw-r--r--src/vnet/devices/virtio/node.c18
1 files changed, 13 insertions, 5 deletions
diff --git a/src/vnet/devices/virtio/node.c b/src/vnet/devices/virtio/node.c
index e0195139321..d7a0b3964b4 100644
--- a/src/vnet/devices/virtio/node.c
+++ b/src/vnet/devices/virtio/node.c
@@ -87,17 +87,23 @@ virtio_refill_vring (vlib_main_t * vm, virtio_vring_t * vring)
u16 sz = vring->size;
u16 mask = sz - 1;
+more:
used = vring->desc_in_use;
if (sz - used < sz / 8)
return;
- n_slots = sz - used;
+ /* deliver free buffers in chunks of 64 */
+ n_slots = clib_min (sz - used, 64);
+
next = vring->desc_next;
avail = vring->avail->idx;
n_slots = vlib_buffer_alloc_to_ring (vm, vring->buffers, next, vring->size,
n_slots);
+ if (n_slots == 0)
+ return;
+
while (n_slots)
{
struct vring_desc *d = &vring->desc[next];;
@@ -117,10 +123,8 @@ virtio_refill_vring (vlib_main_t * vm, virtio_vring_t * vring)
vring->desc_in_use = used;
if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0)
- {
- u64 b = 1;
- CLIB_UNUSED (int r) = write (vring->kick_fd, &b, sizeof (b));
- }
+ virtio_kick (vring);
+ goto more;
}
static_always_inline uword
@@ -140,6 +144,10 @@ virtio_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
u16 last = vring->last_used_idx;
u16 n_left = vring->used->idx - last;
+ if ((vring->used->flags & VIRTIO_RING_FLAG_MASK_INT) == 0 &&
+ vring->last_kick_avail_idx != vring->avail->idx)
+ virtio_kick (vring);
+
if (n_left == 0)
goto refill;