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Some devices benefit from ability to find out the number of available
descriptors in the ring: for efficiency or as a debugging aid.
To help with these optimizations, add a new feature:
VIRTIO_F_NOTIFICATION_DATA. When negotiated, driver notifications to the
device include this extra information.
Fixes: https://github.com/oasis-tcs/virtio-spec/issues/26
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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This reverts commit 396b1957817e0bd14697e28d9fe61bfc80f1350f.
Was pushed by mistake.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Some devices benefit from ability to find out the number of available
descriptors in the ring: for efficiency or as a debugging aid.
To help with these optimizations, add a new feature:
VIRTIO_F_NOTIFICATION_DATA. When negotiated, driver notifications to the
device include this extra information.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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