On Fri, 5 Apr 2019, Josh Poimboeuf wrote:
> On Fri, Apr 05, 2019 at 05:07:18PM +0200, Thomas Gleixner wrote:
> > The current implementation of in_exception_stack() iterates over the
> > exception stacks array. Most of the time this is an useless exercise, but
> > even for the actual use cases
On Fri, Apr 05, 2019 at 05:07:18PM +0200, Thomas Gleixner wrote:
> The current implementation of in_exception_stack() iterates over the
> exception stacks array. Most of the time this is an useless exercise, but
> even for the actual use cases (perf and ftrace) it takes at least 2
> iterations to
The current implementation of in_exception_stack() iterates over the
exception stacks array. Most of the time this is an useless exercise, but
even for the actual use cases (perf and ftrace) it takes at least 2
iterations to get to the NMI stack.
As the exception stacks and the guard pages are
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