Anywhere where you've patched for Meltdown. If PCID is not visible to the guest, there's a TLB flush on every syscall, even when it's not necessary.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1745247 Title: [Hyper-V] x86/hyperv: Stop suppressing X86_FEATURE_PCID To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1745247/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
