Re: [patch 1/2] x86_64 page fault NMI-safe

[Linus Torvalds]

On Thu, Jul 15, 2010 at 4:41 PM, H. Peter Anvin <hpa@xxxxxxxxx> wrote:
>
> No, the problem is that without IST it'll try to drop the NMI stack
> frame itself *on the user stack*.

Oh, because SS has already been cleared, but rsp still points to the
user stack? Ok, that does seem insurmountable.

             Linus
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