You are not logged in.
OpenBSD disables Hyper-Threading:
https://www.heise.de/security/meldung/S … 87035.html
Are there plans to follow this in Arch too ?
Thanks very much.
Edit:
topic from the link translated into English:
"To reduce the risk of Specter vulnerability attacks, the OpenBSD operating system now disables Multi-Threading on Intel processors."
Last edited by ua4000 (2018-06-23 07:40:01)
Offline
I assume the usual general answer applies: Arch Linux will use the default configuration of the (mostly) unpatched software that is released by the official developers. In other words, if Linus decides to disable hyper-threading by default in Linux, then Arch Linux will too.
(I DO NOT REPRESENT ARCH LINUX IN ANY WAY.)
Last edited by drcouzelis (2018-06-20 17:50:07)
Offline
Arch uses linux kernel (hence the name), not OpenBSD kernel, so this has nothing to do with Arch linux.
If linux kernel developers decided to disable SMT for everybody, that would be another story.
Offline
Thanks for the insight!
Offline
If you want to disable smt on your own machines, then you can use the kernel paramater nosmt.
https://www.kernel.org/doc/html/v4.17/a … eters.html
| alias CUTF='LANG=en_XX.UTF-8@POSIX ' |
Offline
Thanks for the very useful link - I bookmarked it :-)
For now I disabled Hyper-Threading in BIOS to test what the "feeled" system degradation could be.
Offline
OpenBSD are proven correct in predicting more variants https://git.kernel.org/pub/scm/linux/ke … 9c1e17aa2d
Offline