On Mon, 8 May 2017 14:07:54 -0700
"Paul E. McKenney" <paul...@linux.vnet.ibm.com> wrote:
 
> Except that, as Steven will quickly point out, this won't work at the
> very edges of the NMI, when NMI_MASK won't be set in preempt_count().

I believe those parts of the NMI has "notrace" because it can break
other parts of ftrace too.

-- Steve

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