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Subject: [OASIS Issue Tracker] Updated: (VIRTIO-28) Implement new balloon device (ID 13)
[ http://tools.oasis-open.org/issues/browse/VIRTIO-28?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Rusty Russell updated VIRTIO-28:
--------------------------------
Proposal:
https://lists.oasis-open.org/archives/virtio/201402/msg00193.html
If accepted, this removes issues VIRTIO-24 and VIRTIO-25, since the old balloon device is now legacy-only.
was:
https://lists.oasis-open.org/archives/virtio/201310/msg00003.html
With minor corrections.
If accepted, this removes issues VIRTIO-24 and VIRTIO-25, since the old balloon device is now legacy-only.
Minimal solution for now.
> Implement new balloon device (ID 13)
> ------------------------------------
>
> Key: VIRTIO-28
> URL: http://tools.oasis-open.org/issues/browse/VIRTIO-28
> Project: OASIS Virtual I/O Device (VIRTIO) TC
> Issue Type: New Feature
> Reporter: Rusty Russell
> Assignee: Rusty Russell
>
> The current virtio balloon device is bad enough that fixing it yields something completely incompatible:
> 1) The page size is 4096, always, rather than some configurable page size.
> 2) Page numbers are 32 bits.
> 3) The deflate queue is not actually used by any device implementation (see issue virtio-25).
> 4) The "actual" number is kind of useless, and (along with the deflate queue) requires the guest to track pages, rather than just faulting them in.
> 5) The config is little-endian by mistake (may not matter).
> We could just move the entire thing to legacy, and have a new balloon device, like:
> 1) An incoming queue for balloon size updates or stats request.
> 2) An outgoing queue for giving 64 bit address/length pairs to balloon, answering stats.
> 3) No config space, no features.
> Thoughts?
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