On Thu, Jun 05, 2025 at 03:35:50PM -0700, Ackerley Tng wrote: > Yan Zhao <yan.y.zhao@xxxxxxxxx> writes: > > > On Wed, Jun 04, 2025 at 01:02:54PM -0700, Ackerley Tng wrote: > >> Hi Yan, > >> > >> While working on the 1G (aka HugeTLB) page support for guest_memfd > >> series [1], we took into account conversion failures too. The steps are > >> in kvm_gmem_convert_range(). (It might be easier to pull the entire > >> series from GitHub [2] because the steps for conversion changed in two > >> separate patches.) > > ... > >> [2] https://github.com/googleprodkernel/linux-cc/tree/gmem-1g-page-support-rfc-v2 > > > > Hi Ackerley, > > Thanks for providing this branch. > > Here's the WIP branch [1], which I initially wasn't intending to make > super public since it's not even RFC standard yet and I didn't want to > add to the many guest_memfd in-flight series, but since you referred to > it, [2] is a v2 of the WIP branch :) > > [1] https://github.com/googleprodkernel/linux-cc/commits/wip-tdx-gmem-conversions-hugetlb-2mept > [2] https://github.com/googleprodkernel/linux-cc/commits/wip-tdx-gmem-conversions-hugetlb-2mept-v2 Hi Ackerley, I'm working on preparing TDX huge page v2 based on [2] from you. The current decision is that the code base of TDX huge page v2 needs to include DPAMT and VM shutdown optimization as well. So, we think kvm-x86/next is a good candidate for us. (It is in repo https://github.com/kvm-x86/linux.git commit 87198fb0208a (tag: kvm-x86-next-2025.07.15, kvm-x86/next) Merge branch 'vmx', which already includes code for VM shutdown optimization). I still need to port DPAMT + gmem 1G + TDX huge page v2 on top it. Therefore, I'm wondering if the rebase of [2] onto kvm-x86/next can be done from your side. A straightforward rebase is sufficient, with no need for any code modification. And it's better to be completed by the end of next week. We thought it might be easier for you to do that (but depending on your bandwidth), allowing me to work on the DPAMT part for TDX huge page v2 in parallel. However, if it's difficult for you, please feel free to let us know. Thanks Yan
