Does Qubes 4.1 not use all the Main Processor Cores?

[catacombs]

I seem to recall seeing something to that effect, to prevent things like Row-hammer.

I guess I was not sure of the documentation in terms of Qubes 4.1 versus other possible configurations, so I thought I would ask. The note I recall was about interleaving of Core, which I guess also means interleaving of RAM. Also, what about, main processor having its own channels directly to RAM, rather than riding the Bus. Does Qubes 4.1 utilize this?

If I was purchasing a laptop, that offered several different Main Processor Cores, I would not want to purchase more than I could effectively use and be secure.

[adw]

You might be thinking of hyperthreading being disabled due to Meltdown and Sepctre.

[catacombs]

So, if I buy a Four Core computer, it will use all four cores in CPU, but not interleaving, which might make it like eight cores?

[ludovic]

Hi @catacombs,

all the answers are here :

Why does Qubes Disable Hyperthreading?

Question from a non tech savvy person. SMT = Hyperthreading? So Qubes disables hyperthreading? Why does Qubes do this? This essentially means that for Qubes there are only so called 4 “logical cores” if you got one CPU with 4 cores though it supports Hyperthreading, which would ammount to 8 logical cores. Thanks for all the answers. I am very interested in not only using it but understanding it as well. If you also got any good reads (books, blogs, wikis etc) on Intel-CPU, Xen, Virualisati…

[catacombs]

Thank you for the answers.

I was concerned with where Qubes 4.1 was headed in terms of possibly limiting hardware.

I think enabling SMP is used for multiple cores. I see SMT is a term for hyper threading. Never knew abbreviation SMT before.

I knew what documentation said of 4.0.4. Yes, there are lots of things I do not know.