[OASIS Issue Tracker] Updated: (VIRTIO-11) Method to stop activity on a queue?

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     [ http://tools.oasis-open.org/issues/browse/VIRTIO-11?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rusty Russell updated VIRTIO-11:
--------------------------------

    Description: 
This has been requested for network devices before.

In particular, in Linux when a network device is closed we leave the buffers in the receive queue, since we can't remove them without resetting the device.

  was:This has been requested for network devices before.  Sometimes it would be useful to stop all queue activity; for example this would allow the driver to stop queue, process any pending interrupts, then pull buffers out of the queue.


This is now available in the draft for PCI.

CCW and MMIO could overload their vq configuration mechanisms to allow switching a vq on or off, but it's implied that's only allowed during device setup, and it may be better to extend them explicitly if we want this.

I'm not convinced of the general utility of this, however.

> Method to stop activity on a queue?
> -----------------------------------
>
>                 Key: VIRTIO-11
>                 URL: http://tools.oasis-open.org/issues/browse/VIRTIO-11
>             Project: OASIS Virtual I/O Device (VIRTIO) TC
>          Issue Type: Improvement
>            Reporter: Rusty Russell
>
> This has been requested for network devices before.
> In particular, in Linux when a network device is closed we leave the buffers in the receive queue, since we can't remove them without resetting the device.

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