On Thu 11-10-18 11:03:07, Dan Williams wrote: > On Thu, Oct 11, 2018 at 4:56 AM Michal Hocko <mhocko@xxxxxxxxxx> wrote: [...] > > In any case, I believe the change itself is not controversial as long it > > is opt-in (potentially autotuned based on specific HW) > > Do you mean disable shuffling on systems that don't have a > memory-side-cache unless / until we can devise a security benefit > curve relative to shuffle-order? The former I can do, the latter, I'm > at a loss. Yes, enable when the HW requires that for whatever reason and make add a global knob to enable it for those that might find it useful for security reasons with a clear cost/benefit description. Not "this is tha security thingy enable and feel safe(r)" -- Michal Hocko SUSE Labs
