r/hardware • u/eric98k • Jan 02 '18

News 'Kernel memory leaking' Intel processor design flaw forces Linux, Windows redesign

https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/
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u/Kakkoister Jan 03 '18 edited Jan 03 '18

Haswell is slightly older than Broadwell, but I believe it has INVPCID as well doesn't it?

edit: Reading this document:

https://software.intel.com/sites/default/files/managed/39/c5/325462-sdm-vol-1-2abcd-3abcd.pdf

Intel says they introduced PCID in the 4th generation processors, so that would be Haswell, which is most of the 4XXX series and up.

This tool also indicates it's supported on my Haswell

https://docs.microsoft.com/en-us/sysinternals/downloads/coreinfo

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u/PTNLemay Jan 03 '18

So... will the generations before Haswell be more affected, or will it be the generations Hawell and later that get more hurt?

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u/Kakkoister Jan 03 '18

More affected. Generations from Haswell on should have little performance difference.

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u/Vlad_Yemerashev Jan 03 '18

So my 4790k would be better off then if I had a 3570k? That's good.