On Wed, Jun 14, 2023, Luiz Capitulino wrote: > > > On 2023-06-13 19:21, Sean Christopherson wrote: > > > > > > > > > On Thu, 01 Jun 2023 17:58:59 -0700, Sean Christopherson wrote: > > > Add a "never" option to the nx_huge_pages module param to allow userspace > > > to do a one-way hard disabling of the mitigation, and don't create the > > > per-VM recovery threads when the mitigation is hard disabled. Letting > > > userspace pinky swear that userspace doesn't want to enable NX mitigation > > > (without reloading KVM) allows certain use cases to avoid the latency > > > problems associated with spawning a kthread for each VM. > > > > > > [...] > > > > Applied to kvm-x86 mmu. I kept the default as "auto" for now, as that can go on > > top and I don't want to introduce that change this late in the cycle. If no one > > beats me to the punch (hint, hint ;-) ), I'll post a patch to make "never" the > > default for unaffected hosts so that we can discuss/consider that change for 6.6. > > Thanks Sean, I agree with the plan. I could give a try on the patch if you'd like. Yes please, thanks!
