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    SubjectRe: [RFC PATCH v3 4/4] arm64: Handle funtion graph tracer better in the unwinder
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    On 5/6/21 9:43 AM, Mark Brown wrote:
    > On Mon, May 03, 2021 at 12:36:15PM -0500, madvenka@linux.microsoft.com wrote:
    >> From: "Madhavan T. Venkataraman" <madvenka@linux.microsoft.com>
    >>
    >> The Function Graph Tracer modifies the return address of a traced function
    >> to a return trampoline (return_to_handler()) to gather tracing data on
    >> function return. When the unwinder encounters return_to_handler(), it calls
    >> ftrace_graph_get_ret_stack() to lookup the original return address in the
    >> return address stack.
    >
    > This makes sense to me, I'll need to re-review properly with the changes
    > earlier on in the series but should be fine.
    >

    I will make changes based on the comments I have received so far and send
    out version 4 so everything is current for the next round of review.

    Thanks!

    Madhavan

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