Hi all: The code used to busy poll for cvq command which turns out to have several side effects: 1) infinite poll for buggy devices 2) bad interaction with scheduler So this series tries to use sleep + timeout instead of busy polling. Please review. Thanks Changes since RFC: - switch to use BAD_RING in virtio_break_device() - check virtqueue_is_broken() after being woken up - use more_used() instead of virtqueue_get_buf() to allow caller to get buffers afterwards - break the virtio-net device when timeout - get buffer manually since the virtio core check more_used() instead Jason Wang (4): virtio-net: convert rx mode setting to use workqueue virtio_ring: switch to use BAD_RING() virtio_ring: introduce a per virtqueue waitqueue virtio-net: sleep instead of busy waiting for cvq command drivers/net/virtio_net.c | 90 +++++++++++++++++++++++++++++++----- drivers/virtio/virtio_ring.c | 37 +++++++++++++-- include/linux/virtio.h | 3 ++ 3 files changed, 115 insertions(+), 15 deletions(-) -- 2.25.1 _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
