Does this mean that SW takes over the datapath during LM?
If so, is there any infrastructureÂto "gracefully" do a hand-off from HW mode (pci device is managing the rings) to SW mode, in that when switching from HW->SW, HW is stalled & quiesced, then the SW takes from where HW leftÂoff?
Rob Miller
(919)721-3339
On Tue, Apr 7, 2020 at 5:53 AM Eugenio Perez Martin <> wrote:
Hi!
So, from the previous mails, it seems that monitoring the used ring
(and the packed descriptors) is a good first step in that direction,
as DPDK did. This way, the device does not need to worry about the
dirty page tracking using a bitmap and the PCI writes limitation, and
we can evaluate later the proposed alternatives:
* Alternate used descriptors in packed.
* vDPA interface for vDPA devices in a convenient format.
Any thoughts? Do you think that we should start with another way?
Thanks!
