| Date | Wed, 20 Oct 2021 17:10:33 +0100 | From | Mark Brown <> | Subject | Re: [PATCH v10 03/11] arm64: Make get_wchan() use arch_stack_walk() |
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On Thu, Oct 14, 2021 at 09:58:39PM -0500, madvenka@linux.microsoft.com wrote: > From: "Madhavan T. Venkataraman" <madvenka@linux.microsoft.com> > > Currently, get_wchan() in ARM64 code walks the stack using start_backtrace() > and unwind_frame(). Make it use arch_stack_walk() instead. This makes > maintenance easier.
This overlaps with some very similar updates that Peter Zijlstra is working on which addresses some existing problems with wchan:
https://lore.kernel.org/all/20211008111527.438276127@infradead.org/
It probably makes sense for you to coordinate with Peter here, some of that series is already merged up to his patch 6 which looks very similar to what you've got here. In that thread you'll see that Mark Rutland spotted an issue with the handling of __switch_to() on arm64 which probably also applies to your change. [unhandled content-type:application/pgp-signature] |