On Wed, 16 Oct 2013 12:36:32 -0700
"Paul E. McKenney" <paul...@linux.vnet.ibm.com> wrote:


> > Ah but we have an in_interrupt() check in context_tracking_user_enter() 
> > that protects
> > us against that.
> 
> Here you are relying on the exception being treated as an interrupt,
> correct?

I don't think so. It's relying on nmi_enter() also makes in_interrupt()
return true.

Like I said before. An NMI interrupting userspace should be no
different than an interrupt interrupting userspace. They both can
trigger vmalloc faults, and we should be able to deal with it.

-- Steve
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