[CentOS-devel] Broken hyperthreading on Intel Skylake and Kaby Lake processors

Laurentiu Pancescu

lpancescu at gmail.com
Tue Jun 27 09:08:20 UTC 2017


Hi there,

I stumbled upon a thread on debian-devel, regarding hyperthreading 
problems on Intel Skylake and Kaby Lake processors (discovered in Q2 
2016 by the OCaml developers, fixed by Intel in microcode updates in May 
2017 - for some, but not all processors [1]).  The "safe" solution is to 
disable hyperthreading in the BIOS, but there's a Perl script telling 
you if you CPU is affected, or affected and patched in microcode. [2]

Considering that (probably) not all processors are fixed, would this 
warrant notifying our users via the centos-announce mailing list?

Best regards,
Laurențiu

[1] https://lists.debian.org/debian-devel/2017/06/msg00308.html
[2] https://lists.debian.org/debian-user/2017/06/msg01011.html



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