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Resolve Issue #91: virtio-mem: minor clarification regarding read-access to unplugged blocks

Should the TC accept changes listed in the description to resolve issue 91, for inclusion in specification version(s) "virtio-v1.2-cs01", and future versions of the specification?

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 #91: virtio-mem: minor clarification regarding read-access to unplugged blocks
Let's clarify that we don't expect all DMA to work with unplugged blocks.
We really only give guarantees when reading from unplugged memory blocks
via the CPU, e.g., as done by Linux when creating a system dump via
kdump: the new kernel will copy the content of the old (crashed) kernel
via the CPU to user space, from where it will find its final destination
inside the dump file. Note that dumping via makedumpfile under Linux will
avoid reading unplugged blocks completely.

This is a preparation for device passthrough to VMs, whereby such
dedicated devices might not be able to read from unplugged memory blocks.

Proposed patch: https://lists.oasis-open.org/archives/virtio-comment/202011/msg00023.html

The TC accepts the following proposed changes to the specification:

The TC agrees to include the above change(s) in specification version(s) "virtio-v1.2-cs01", and future versions of the


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 [ ]  Yes
 [ ]  No
 [ ]  Abstain
Opening:   Monday, 7 December 2020 @ 08:15 am EST
Closing:   Monday, 14 December 2020 @ 08:15 am EST
Group:   OASIS Virtual I/O Device (VIRTIO) TC
Ballot has closed.

Referenced Items
Name Type Date Action

Voting Details

Voting Summary

Options with highest number of votes are bold

Option # Votes % of Total
Yes 5 100%
No 0 0%
Abstain 1
Eligible members who have voted: 5 of 8 63%
Eligible members who have abstained: 1 of 8 13%
Eligible members who have not voted: 2 of 8 25%

Voting Details

Voter Company VoteReference Document and/or Comment
Enrico Granata
Google Inc.
Halil Pasic
Matti Moell
OpenSynergy GmbH
Mihai Carabas
Michael S. Tsirkin
Red Hat
Stefan Hajnoczi
Red Hat
Cornelia Huck
Red Hat
Jan Kiszka
Siemens AG