Il ven 3 gen 2020, 16:08 Yang Zhong <yang.zh...@intel.com> ha scritto:
> I also tried virtio-blk device like below: > https://patchwork.kernel.org/cover/10873193/ > > The virtio-blk can work with this changes, but vhost-user-blk device > failed with this kernel patch. > > in vhost_virtqueue_start() function, below operation to check if the > desc addr set by guest kernel. This will ignore the extra vqs. > a = virtio_queue_get_desc_addr(vdev, idx); > if (a == 0) { > /* Queue might not be ready for start */ > return 0; > } > > If guest kernel add min(cpu,num_vqs), do we need add same check in > realize function of vhost-user-blk device? > No. If virtio-blk works, the bug is in vhost-user-blk; if virtio-blk needs no check in cpu count, vhost-user-blk also doesn't. You need to check first if the bug is in QEMU or the vhost-user-blk server. Paolo
