On Thu, Oct 17, 2024 at 10:58:29AM -0400, Peter Xu wrote: > My question was more torwards whether gmemfd could still expose the > possibility to be used in VA forms to other modules that may not support > fd+offsets yet. I keep hearing they don't want to support page pinning on a guestmemfd mapping, so VA based paths could not work. > I think as long as we can provide gmemfd VMAs like what this series > provides, it sounds possible to reuse the old VA interfaces before the CoCo > interfaces are ready, so that people can already start leveraging gmemfd > backing pages. And you definitely can't get the private pages out of the VA interface because all the VMA PTEs of private pages are non-present by definition. Hence, you must use the FD for a lot of use cases here. Jason
