Re: [PATCH] x86: Remove WARN_ON(in_nmi()) from vmalloc_fault

[Steven Rostedt]

On Wed, 16 Oct 2013 12:36:32 -0700
"Paul E. McKenney" <paulmck@xxxxxxxxxxxxxxxxxx> 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
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/