On Thu, Nov 20, 2014 at 3:39 PM, Tejun Heo <t...@kernel.org> wrote: > On Thu, Nov 20, 2014 at 03:08:03PM -0800, Andy Lutomirski wrote: >> > So, for now, all we need is adding nmi check in percpu accessors, >> > right? >> > >> >> What's the issue with nmi? Page faults are supposed to nest correctly >> inside nmi, right? > > Thought they couldn't. Looking at the trace that Frederic linked, it > looks like straight-out tracing function recursion due to an > unexpected fault while holding a lock. I don't think this can be > annotated from percpu accessor side. There's nothing special about > the context. :(
That doesn't appear to have anything to with nmi though, right? Wouldn't this issue be fixed by moving the vmalloc_fault check into do_page_fault before exception_enter? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
