Messages in this thread | | | From | Alvaro Karsz <> | Date | Thu, 22 Dec 2022 08:44:12 +0200 | Subject | Re: [RFC PATCH 4/4] virtio-net: sleep instead of busy waiting for cvq command |
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Hi Jason,
Adding timeout to the cvq is a great idea IMO.
> - /* Spin for a response, the kick causes an ioport write, trapping > - * into the hypervisor, so the request should be handled immediately. > - */ > - while (!virtqueue_get_buf(vi->cvq, &tmp) && > - !virtqueue_is_broken(vi->cvq)) > - cpu_relax(); > + virtqueue_wait_for_used(vi->cvq, &tmp);
Do you think that we should continue like nothing happened in case of a timeout? Shouldn't we reset the device? What happens if a device completes the control command after timeout?
Thanks
Alvaro
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