Messages in this thread | | | Date | Fri, 8 Jan 2016 15:42:32 -0800 | Subject | Re: [RFC 00/13] x86/mm: PCID and INVPCID | From | Linus Torvalds <> |
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On Fri, Jan 8, 2016 at 3:36 PM, Andy Lutomirski <luto@amacapital.net> wrote: >> >> Either things have changed (newer hardware with more pcids perhaps?) >> or you did a better job at it. > > On my Skylake laptop, all of the PCID bits appear to have at least > some effect. Whether this means it gets hashed or whether this means > that all of the bits are real, I don't know.
They have always gotten hashed, and no the bits aren't real - hardware doesn't actually have as many bits in the pcid as there are in cr3.
Linus
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