Messages in this thread | | | From | Linus Torvalds <> | Date | Fri, 23 Mar 2018 17:54:35 -0700 | Subject | Re: [PATCH 00/11] Use global pages with PTI |
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On Fri, Mar 23, 2018 at 5:46 PM, Linus Torvalds <torvalds@linux-foundation.org> wrote: > > It is, of course, possible that I misunderstood what you actually > benchmarked. But I assume the above benchmark numbers are with the > whole "don't even do global entries if you have PCID".
Oh, I went back and read your description, and realized that I _had_ misunderstood what you did.
I thought you didn't bother with global pages at all when you had PCID.
But that's not what you meant. You always do global for the actual user-mapped kernel pages, but when you don't have PCID you do *all* kernel test as global, whether shared or not.
So I entirely misread what the latest change was.
Linus
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