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SubjectRe: [PATCH v2 5/7] x86/mm, tracing: Fix CR2 corruption
On Fri, Jul 5, 2019 at 5:03 AM Peter Zijlstra <> wrote:
> Despire the current efforts to read CR2 before tracing happens there
> still exist a number of possible holes:

So this whole series disturbs me for the simple reason that I thought
tracing was supposed to save/restore cr2 and make it unnecessary to
worry about this in non-tracing code.

That is very much what the NMI code explicitly does. Why shouldn't all
the other tracing code do the same thing in case they can take page

So I don't think the patches are wrong per se, but this seems to solve
it at the wrong level.


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