da78c67091
This feature is not particularly useful for storage. It forces us to read additional vq memory on each I/O completion and that's quite expensive. Quoting VIRTIO 1.0: ``` VIRTIO_F_NOTIFY_ON_EMPTY (24) If this feature has been negotiated by driver, the device MUST issue an interrupt if the device runs out of available descriptors on a virtqueue, even though interrupts are suppressed using the VIRTQ_AVAIL_F_NO_INTERRUPT flag or the used_event field. ``` Later on: ``` Note: An example of a driver using this feature is the legacy networking driver: it doesn’t need to know every time a packet is transmitted, but it does need to free the transmitted packets a finite time after they are transmitted. It can avoid using a timer if the device interrupts it when all the packets are transmitted. ``` Change-Id: I7f53293bf811a4cd5ae8e42e18f35042ea6f4ba8 Suggested-by: Pawel Wodkowski <pawelx.wodkowski@intel.com> Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com> Reviewed-on: https://review.gerrithub.io/398325 Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com> Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> |
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| .. | ||
| rte_vhost | ||
| Makefile | ||
| vhost_blk.c | ||
| vhost_internal.h | ||
| vhost_rpc.c | ||
| vhost_scsi.c | ||
| vhost.c | ||