Re: [PATCH v10 03/11] arm64: Make get_wchan() use arch_stack_walk()
From: Madhavan T. Venkataraman <hidden>
Date: 2021-10-21 12:30:45
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live-patching, lkml
I will take a look at what Peter has done and will coordinate with him. Thanks. Madhavan On 10/20/21 11:10 AM, Mark Brown wrote:
On Thu, Oct 14, 2021 at 09:58:39PM -0500, madvenka@linux.microsoft.com wrote:quoted
From: "Madhavan T. Venkataraman" <redacted> 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/ (local) 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. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
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