On Friday, 21 June 2024 at 01:47, Gary Buhrmaster wrote:
On Wed, Jun 19, 2024 at 8:39 AM Neal Gompa ngompa13@gmail.com wrote:
[...]
I will also note that since that -v1 desktop/laptop systems of the legacy architecture do not support EPT,
If you mean Extended Page Table here, then Wikipedia[1] says it was introduced in 2010 with the Westmere[2] micro-architecture.
[1] https://en.wikipedia.org/wiki/Second_Level_Address_Translation#EPT [2] https://en.wikipedia.org/wiki/Westmere_(microarchitecture)
I don't know any way to tell if my Cedar View Atom D2550 CPU from 2012 supports it or not. Not that I'd want to run QEMU on it.
even native architecture virtualization is extremely poor performance wise, which is why I don't care about qemu on -v1 systems (and don't have it installed on my -v1 system). If qemu is compiled as -v2+ only I would never notice the difference on that system as I don't even install it on that system (although I would, presumably, see the performance enhancements on my -v2+ desktop).
+1
- RPM now lets us "tell the truth" about what x86_64 sublevel we expect
And if compiling qemu with -v2 has a performance benefit, that seems to be a positive path forward.
+1. Just build it with --target x86_64_v2 and announce it widely. -1 to building all Fedora as v2.
Regards, Dominik