Thanks for sharing On Mon, Jan 8, 2018 at 7:11 AM Nux! <n...@li.nux.ro> wrote:
> Hello, > > Just stumbled upon this > https://twitter.com/berrange/status/950209752486817792 > > "ensure KVM guest CPU model you choose has the "pcid" feature, otherwise > guests will suffer terrible performance from the Meltdown fixes. This means > using a named Haswell, Broadwell or Skylake based model or host passthrough" > > > This means whoever is running with the KVM default CPU (like I do) as > opposed to specific ones or host passthrough needs to change this in order > to avoid bad performance once the new mitigating kernel is installed. > > > Bad news is older Xeons do not support this, check if "invpcid" flag shows > up in /proc/cpuinfo (you might see "pcid", that one is not enough). > > > > > > -- > Sent from the Delta quadrant using Borg technology! > > Nux! > www.nux.ro >
