> > And on that note I see that upstream just released 4.14.11 containing > what is widely speculated as a fix for an Intel CPU security > vulnerability. I noticed that it doesn't disable the > performance-impacting setting on AMD CPUs. Though, right now only AMD > could say whether this is necessary (their lkml post suggests it is > not). This is an upstream release - I don't know when Gentoo plans to > release it. I'm sure it will be making the rounds in the various news > sites any day. >
https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ "The effects are still being benchmarked, however we're looking at a ballpark figure of five to 30 per cent slow down, depending on the task and the processor model. More recent Intel chips have features – specifically, PCID <http://forum.osdev.org/viewtopic.php?f=1&t=29935> – to reduce the performance hit." AMD coder's patch to disable the new code (to avoid the performance hit) where he states the issue doesnt exist on AMD processors; https://lkml.org/lkml/2017/12/27/2
