Re: [PATCH V2 6/6] virtio-pci: implement dirty page tracking

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Nov 06, 2023 at 04:34:44AM +0000, Parav Pandit wrote:
> > Do you know there are locked transaction and atomic operations in PCI???
> Can you explain how PCI does RMW locked transaction?
> Is it one TLP or multiple?

Parav what are you asking about here? pcie supports CAS and Swap which
likely can work for this use-case - these are non posted writes. It's in
the pcie spec. Zhu Lingshan if your proposal relies on this then you should
include
- explanation on how it's supposed to be implemented using AtomicOp
- some data on how common support is or is likely to be in the field

-- 
MST