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

Linus Torvalds
2010-07-15T23:45:06Z

On Thu, Jul 15, 2010 at 4:41 PM, H. Peter Anvin <hpa@zytor.com> 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