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Date:   Mon, 16 Apr 2018 08:32:46 -0700
From:   Linus Torvalds <>
To:     Joerg Roedel <>
Cc:     Thomas Gleixner <>,
        Ingo Molnar <>,
        "H . Peter Anvin" <>,
        "the arch/x86 maintainers" <>,
        Linux Kernel Mailing List <>,
        linux-mm <>, Andy Lutomirski <>,
        Dave Hansen <>,
        Josh Poimboeuf <>,
        Juergen Gross <>,
        Peter Zijlstra <>,
        Borislav Petkov <>, Jiri Kosina <>,
        Boris Ostrovsky <>,
        Brian Gerst <>,
        David Laight <>,
        Denys Vlasenko <>,
        Eduardo Valentin <>,
        Greg KH <>,
        Will Deacon <>,
        "Liguori, Anthony" <>,
        Daniel Gruss <>,
        Hugh Dickins <>,
        Kees Cook <>,
        Andrea Arcangeli <>,
        Waiman Long <>, Pavel Machek <>,
        "David H . Gutteridge" <>,
        Joerg Roedel <>
Subject: Re: [PATCH 00/35 v5] PTI support for x32

On Mon, Apr 16, 2018 at 8:24 AM, Joerg Roedel <> wrote:
> I tested this version again with my load-test of running
> perf-top/various x86-selftests/kernel-compile in a loop for
> a couple of hours. This showed no issues. I also briefly
> tested a 64bit kernel and this also worked as expected.

Andy, can you send your extra x86 self-tests to Joerg too?

Also, it would be nice to have performance numbers, and check that the
global page issues are at least fixed on 32-bit too, since we screwed
that up on x86-64 initially.

On x86-32, the global pages are likely a bigger deal since there's no PCID.


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