[PATCH v3 0/7] arm64: ftrace: fix incorrect output from stack tracer
jungseoklee85 at gmail.com
Thu Oct 8 07:45:01 PDT 2015
On Oct 8, 2015, at 7:01 PM, AKASHI Takahiro wrote:
> This is the third patch series for fixing stack tracer on arm64.
> The original issue was reported by Jungseok, and then I found more
> (Steven, Jungseok, sorry for not replying to your comments directly.)
> I address here all the issues and implement fixes described in  except
> for interrupt-triggered problems, ie. II-3). Recent discussions about
> introducing a dedicated interrupt stack suggests that we may avoid walking
> through from an interrupt stack to a process stack.
> (So interrupt-stack patch is a prerequisite.)
> patch1 corresponds to the original issue.
> patch2 is a proactive improvement of function_graph tracer.
> patch3 corresponds to II-4(functions under function_graph tracer).
> patch4 corresponds to II-5(leaf function).
> patch5, 6 and 7 correspond to II-1(slurping stack) and II-2(differences
> between x86 and arm64).
> Each fix can be applied independently, but if patch5, 6 and 7 are
> acceptable, patch1 is not necessary because patch7 replaces a default
> stack tracer.
> I tested the code with v4.3-rc3 + Jungseok's patch v3.
>  http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/354126.html
>  http://lists.infradead.org/pipermail/linux-arm-kernel/2015-July/355920.html
>  http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/368003.html
>  http://lists.infradead.org/pipermail/linux-arm-kernel/2015-September/371451.html
The  is not a valid patch. I hope the test has been going with the following one.
I will leave comments after playing with this series on top of my IRQ stack tree.
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