b4f68be6c5
virtio allows drivers to suppress callbacks (ie. interrupts) for efficiency (no locking, it's just an optimization). There's a similar mechanism for the host to suppress notifications coming from the guest: in that case, we ignore the suppression if the ring is completely full. It turns out that life is simpler if the host similarly ignores callback suppression when the ring is completely empty: the network driver wants to free up old packets in a timely manner, and otherwise has to use a timer to poll. We have to remove the code which ignores interrupts when the driver has disabled them (again, it had no locking and hence was unreliable anyway). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> |
||
|---|---|---|
| .. | ||
| config.c | ||
| Kconfig | ||
| Makefile | ||
| virtio.c | ||
| virtio_balloon.c | ||
| virtio_pci.c | ||
| virtio_ring.c | ||