> "the meltdown patch in the kernel thats disabled by default"
I'm not sure to what you are referring to here.
I was one of the people who worked on the Linux PTI implementation that mitigated Meltdown. My memory is not perfect, but I honestly don't know what you're referring to.
> The whole IBRS_ALL feature to me very clearly says "Intel is not serious about this, we'll have a ugly hack that will be so expensive that we don't want to enable it by default, because that would look bad in benchmarks".
