On Thu, Mar 23, 2023 at 08:04:24AM +0000, Tian, Kevin wrote: > > 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? That looks like it would make things more complicated as we'd have to be alot more careful with the group refcount to avoid bugs. Jason
