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Date:   Fri, 31 Aug 2018 09:57:59 -0700
From:   Linus Torvalds <>
To:     Tony Luck <>
Cc:     Thomas Gleixner <>,
        Ingo Molnar <>, Peter Anvin <>,
        Borislav Petkov <>,
        linux-edac <>,
        Linux Kernel Mailing List <>,
        "the arch/x86 maintainers" <>,
        Dan Williams <>,
        Dave Jiang <>
Subject: Re: [PATCH V2] x86/mce: Fix set_mce_nospec() to avoid #GP fault

Ack. This looks good with the big comment and explanation.


On Fri, Aug 31, 2018 at 9:55 AM Luck, Tony <> wrote:
> The trick with flipping bit 63 to avoid loading the address of the
> 1:1 mapping of the poisoned page while we update the 1:1 map used
> to work when we wanted to unmap the page. But it falls down horribly
> when we try to directly set the page as uncacheable.
> [ ... ]

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