Messages in this thread | | | Date | Fri, 18 Oct 2013 04:54:51 -0700 | From | "Paul E. McKenney" <> | Subject | Re: [PATCH] x86: Remove WARN_ON(in_nmi()) from vmalloc_fault |
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On Wed, Oct 16, 2013 at 03:57:30PM -0400, Steven Rostedt wrote: > On Wed, 16 Oct 2013 12:36:32 -0700 > "Paul E. McKenney" <paulmck@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.
Got it, never mind!
Thanx, Paul
> 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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