On 27/06/17 10:08, Laurentiu Pancescu wrote: > 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 I have a potentially affected system. I've filed a bug with Red Hat to request microcode_ctl be updated to include the latest microcode: https://bugzilla.redhat.com/show_bug.cgi?id=1465631 I can confirm the issue is not fixed in the current RHEL7.4beta microcode_ctl package. In the meantime I've manually applied the microcode update on my affected system. phil