On 10/13/2017 09:38 PM, Michael S. Tsirkin wrote:
On Thu, Oct 12, 2017 at 11:54:56AM +0800, Wei Wang wrote:
But I think flushing is very fragile. You will easily run into races
if one of the actors gets out of sync and keeps adding data.
I think adding an ID in the free vq stream is a more robust
approach.
Adding ID to the free vq would need the device to distinguish whether it
receives an ID or a free page hint,
Not really. It's pretty simple: a 64 bit buffer is an ID. A 4K and bigger one
is a page.
I think we can also use the previous method, free page via in_buf, and
id via out_buf.
Best,
Wei
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