On Mon, Feb 06, 2023 at 06:15:16PM +0000, Sean Christopherson wrote:
On Mon, Feb 06, 2023, Oliver Upton wrote:
+cc x86, riscv as they're also affected.
On Thu, Feb 02, 2023 at 09:01:36PM +0000, Mark Brown wrote:
The page_fault_test KVM selftest requires userfaultfd but the config fragment for the KVM selftests does not enable it, meaning that those tests are skipped in CI systems that rely on appropriate settings in the config fragments except on S/390 which happens to have it in defconfig. Enable the option in the config fragment so that the tests get run.
What do CI systems do for HugeTLB and THP? Those are the other config options I can think of where there are very interesting interactions from a KVM perspective, but where KVM doesn't have a strict dependency on the feature.
E.g. x86_64_defconfig selects CONFIG_HUGETLBFS=y, but I don't see anything for THP, and AFAICT TRANSPARENT_HUGEPAGE is default=n.
Looks like arm64 defconfig enables THP and hugetlb. Regardless, I think it would be valuable if our Kconfig fragment expressed the options that buy us additional code coverage.
-- Thanks, Oliver