Document:
03177: Resolve Issue #3: add packed ring layout support

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Submitted By Mr. Michael S. Tsirkin on 2018-03-16 8:31 pm UTC

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OASIS Virtual I/O Device (VIRTIO) TC / System Ballot Results

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Description

Please vote Yes if you agree with all of the following. If you disagree, please vote No. If you don't have an opinion, please vote Abstain. I move that: The TC agrees to resolve the following specification issue: Issue #3: add packed ring layout support -------------------------------------- This is a proposal to implement an alternative ring layout. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. This is more efficient and easier for devices to implement than the 1.0 layout. Additionally, a new feature flag is proposed that makes devices promise to process descriptors in-order. With this feature drivers can also be made simpler and more efficient. Discussion and performance analysis of this is in Michael Tsirkin's kvm forum 2016 and 2017 presentations. -------------------------------------- The TC accepts the following proposed changes to the specification: -------------------------------------- Proposal: https://lists.oasis-open.org/archives/virtio/201803/msg00041.html Note: should this proposal be accepted and approved, one or more claims disclosed to the TC admin and listed on the Virtio TC IPR page https://github.com/oasis-tcs/virtio-admin/blob/master/IPR.md might become Essential Claims. -------------------------------------- The TC agrees to include the above change(s) in specification version(s) "virtio-v1.1-cs01", and future versions of the specification. -------------------------------------- Reminder: A Voting Member must be active in a TC to maintain voting rights. As the Virtio TC has adopted a standing rule to conduct business only by electronic ballot, without Meetings, a Voting Member who fails to cast a ballot in two consecutive Work Product Ballots loses his or her voting rights at the close of the second ballot missed. --------------------------------------