On Thu, Aug 27, 2020 at 04:13:44PM +0000, Derrick, Jonathan wrote: > On Thu, 2020-08-27 at 06:34 +0000, hch@xxxxxxxxxxxxx wrote: > > On Wed, Aug 26, 2020 at 09:43:27PM +0000, Derrick, Jonathan wrote: > > > Feel free to review my set to disable the MSI remapping which will > > > make > > > it perform as well as direct-attached: > > > > > > https://patchwork.kernel.org/project/linux-pci/list/?series=325681 > > > > So that then we have to deal with your schemes to make individual > > device direct assignment work in a convoluted way? > > That's not the intent of that patchset -at all-. It was to address the > performance bottlenecks with VMD that you constantly complain about. I know. But once we fix that bottleneck we fix the next issue, then to tackle the next. While at the same time VMD brings zero actual benefits. > > Please just give us > > a disable nob for VMD, which solves _all_ these problems without > > adding > > any. > > I don't see the purpose of this line of discussion. VMD has been in the > kernel for 5 years. We are constantly working on better support. Please just work with the platform people to allow the host to disable VMD. That is the only really useful value add here.
