> From: Jason Gunthorpe <jgg@xxxxxxxxxx> > Sent: Wednesday, March 22, 2023 3:15 AM > > The implementation is complicated because we have to introduce some > per-iommu_group memory in iommufd and redo how we think about multi- > device > groups to be more explicit. This solves all the locking problems in the > prior attempts. > By tracking groups explicitly should we also move DMA ownership claim to be per group?